Can somebody pls answer this question fast​

Can Somebody Pls Answer This Question Fast

Answers

Answer 1

The solution of the expression is,

⇒ 0 + (7/11)√5

We have to given that;

Expression is,

⇒ (7 + √5) / (7 - √5) - (7 - √5) / (7 + √5)

Take LCM we get;

⇒ (7 + √5)² - (7 - √5)² / (7 - √5) (7 + √5)

⇒ (49 + 5 + 14√5) - (49 + 5 - 14√5) / (7² - √5²)

⇒ (28√5) / (49 - 5)

⇒ 28√5 / 44

⇒ 7√5 / 11

⇒ 0 + (7/11)√5

Thus, The solution of the expression is,

⇒ 0 + (7/11)√5

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Related Questions

Lois is checking the distance between two doors on a blueprint. The
blueprint uses a scale in which 2 inches equals 8 meters. If the actual
distance between the doors is 75 meters, how far is it between the
doors on the blueprint, in inches? Your answer can be exact or
rounded to two decimal places.

Answers

On the drawing, there are 18.75 inches between each door.

The blueprint scale states that 2 inches on the blueprint represents 8 meters in actual distance. We need to determine how many inches on the blueprint correspond to a distance of 75 meters.

We can set up a proportion to solve this problem. Let x be the distance between the doors on the blueprint, in inches. Then:

2 inches / 8 meters = x inches / 75 meters

Cross-multiplying, we get:

2 inches × 75 meters = 8 meters × x inches

150 inches = 8x

Dividing both sides by 8, we get:

x = 18.75 inches

Therefore, the distance between the doors on the blueprint is 18.75 inches. This means that, according to the blueprint's scale, the blueprint representation of the actual distance between the doors is 18.75 inches.

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what is the length of the line

Answers

The length of the line is given as follows:

B. 12 units.

What is the Pythagorean Theorem?

The Pythagorean Theorem states that in a right-angled triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the lengths of the other two sides.

The theorem is expressed as follows:

c² = a² + b².

In which:

c is the length of the hypotenuse.a and b are the lengths of the other two sides (the legs) of the right-angled triangle.

The parameters for this problem are given as follows:

Length of the line is the hypotenuse.Horizontal change is of 10 units.Vertical change is of 6 units.

Hence the length of the line is given as follows:

l² = 10² + 6²

[tex]l = \sqrt{10^2 + 6^2}[/tex]

l = 12 units. (rounded up).

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a bicycle wheel has a diameter of 2.8 ft if it rotates at 40 rpm how far will it travel in 2 hours

Answers

First, we need to calculate the circumference of the bicycle wheel using its diameter:

Circumference = π x Diameter

Circumference = 3.14 x 2.8 ft

Circumference = 8.792 ft

Next, we need to find the distance traveled by the bicycle wheel in 2 hours, given that it rotates at 40 revolutions per minute:

1 revolution = circumference

40 revolutions = 40 x circumference

40 revolutions = 40 x 8.792 ft

40 revolutions = 351.68 ft

So, the distance traveled by the bicycle wheel in 1 minute is 351.68 ft.

To find the distance traveled in 2 hours, we need to convert 2 hours to minutes:

2 hours = 2 x 60 minutes = 120 minutes

Finally, we can calculate the total distance traveled in 2 hours:

Distance traveled = 351.68 ft/minute x 120 minutes

Distance traveled = 42,201.6 ft

Therefore, the bicycle wheel will travel a distance of 42,201.6 ft in 2 hours.

a bag contains four red marbles and seven blue marbles. you randomly pick a marble and then pick a second marble without returning the marbles to the bag. what is the probability that both marbles are red.

Answers

Answer:

6/55

Step-by-step explanation:

4 red + 7 blue = 11 marbles in total

P(first red) = 4/11.

we now have 10 marbles left. 3 of them are red.

P(second red) = 3/10

P(both red) = 4/11 X 3/10 = 12/110 = 6/55

Need help with the first three

Answers

Answer:

6 books

6 packages of mints

It would cost $240.00 is carpet was purchased.

Step-by-step explanation:

If 2 books cost 16.40, then one book costs 16.40/2 = 8.20 each.

50/8.20 = 6.1 rounded. You cannot buy part of a book, so 6 books may be purchases.

If 2 packages of mints cost .69, then I package costs .69/2 = .345

2.25/ .345 = 6.5 rounded.  You cannot buy .5 of a package, so you can purchases 6 packages.

192/16 = 12

There are 12 square meters of flooring

12 x 20 = 240

Helping in the name of Jesus.

Thank you if you helped

Answers

Answer:

(x + 2)² + (y - 5)² = 13

Step-by-step explanation:

equation of circle is (x - a)² + (y - b)² = r²

where a is x-coordinate of centre of circle, b is y-coordinate of centre of circle, r is the radius. radius = half of diameter.

(-2, 5) is centre.

radius = √((7 - 5)² + (1 - -2)²)

= √(4 + 9)

=√13

equation of our circle is (x - -2)² + (y - 5)² = (√13)²

(x + 2)² + (y - 5)² = 13

amazon claims that if you are a prime member, 85% of your packages will arrive within two business days. you have decided that you want to know if this claim is true. you take a simple random sample of 25 students at your school and 19 of the students claim that their packages arrived within two business days of ordering. a. what is the population proportion? what is the sample proportion? please use correct symbols in your answer.

Answers

Population proportion (claim): p = 0.85

Sample proportion: [tex]\hat p[/tex]= 19/25

What is proportion?

In statistics, proportion typically refers to the proportion or percentage of individuals or items in a population that have a specific characteristic or belong to a certain category.

In this scenario, the population proportion refers to the proportion of all Prime members' packages that arrive within two business days. The claim made by Amazon is that this population proportion is 85%.

Let's denote the population proportion as p.

a. The population proportion:

p = 0.85

The sample proportion, on the other hand, refers to the proportion of packages that arrived within two business days among the 25 students in the random sample. We can calculate the sample proportion using the number of students who claimed their packages arrived within two business days.

Let's denote the sample proportion as [tex]\hat p[/tex] (pronounced "p-hat").

Given:

Number of students in the sample (n) = 25

Number of students who claimed their packages arrived within two business days (x) = 19

b. The sample proportion:

[tex]\hat p[/tex] = x / n

[tex]\hat p[/tex] = 19 / 25

Therefore, the sample proportion is 19/25.

To summarize:

Population proportion (claim): p = 0.85

Sample proportion: [tex]\hat p[/tex] = 19/25

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Lessons are 55 mins
long. A history lesson
ends at 3:30pm
what time did it
start?
ive been finding it rlly difficult pls can someone explain it in depth?

Answers

Answer:

The history class started at 2:35 pm

Step-by-step explanation:

To find the before time or starting time, we need to subtract 55 min from 3:30.

We cannot subtract 55 min from 30 min.

1 hour = 60 minutes. 3 : 30 can be written as 2: 90 minutes

Now subtract,

               2 : 90

          -      : 55

               2 : 35

The history class started at 2:35 pm

A photographer had to change the size of his cover photo. He increased the length by 30% and decreased the width by 10%. By what percent was the area of the final photo changed?

Answers

Answer:

17%

---------------------

Let the dimensions be x and y.

The area is:

A = xy

When sides have changed we get:

x + 30% = x + 0.3x = 1.3xy - 10% = y - 0.1y = 0.9y

The new area is:

A = 1.3x * 0.9y = 1.17xy

The difference in areas is:

1.17xy - xy = 0.17xy

It represents 17% increase.

An urn contains 6 red beads, 4 blue beads, and 2 green beads. If a single bead is picked at random, what is the probability that the bead is blue?
Give your answer as a fraction.

Answers

[tex]|\Omega|=6+4+2=12\\|A|=4\\\\P(A)=\dfrac{4}{12}=\dfrac{1}{3}\approx33.3\%[/tex]

Answer:

Step-by-step explanation: 6 + 4 + 2 = 12 (denominator)

Put 4 (blue beads) in numerator

4/12 reduces to 1/3

Final answer is 1/3

Solving multi-step equations Please help me with this!!! this is due!!

Answers

1. The value of x in the expression is 3

2. The value of y in the expression is -9/16

3. The value of d in the expression is -16 / 25

4. The value of x in the expression is 1

1. How do i determine the value of x?

The value of x in the expression can be obtained as follow:

Equation: x + 5 = 3x - 1Value of x =?

x + 5 = 3x - 1

Collect like terms

5 + 1 = 3x - x

6 = 2x

Divide both sides by 2

x = 6 / 2

Value of x = 3

2. How do i determine the value of y?

The value of y in the expression can be obtained as follow:

Equation: 5y/6 + 1 = -1y/2 + 1/4Value of y =?

5y/6 + 1 = -1y/2 + 1/4

Collect like terms

5y/6 + y/2 = 1/4 - 1

(5y + 3y)/6 = (1 - 4)/4

8y/6 = -3/4

Cross multiply

8y × 4 = 6 × -3

32y = -18

Divide both sides by 32

y = -18 / 32

Value of y = -9/16

3. How do i determine the value of d?

The value of d in the expression can be obtained as follow:

Equation: 20 + 3d = 36 + 28dValue of d =?

20 + 3d = 36 + 28d

Collect like terms

20 - 36 = 28d - 3d

-16 = 25d

Divide both sides by 25

d = -16 / 25

Value of d = -16 / 25

4. How do i determine the value of x?

The value of x in the expression can be obtained as follow:

Equation: 4(x + 8) - 4 = 34 - 2xValue of x =?

4(x + 8) - 4 = 34 - 2x

Clear bracket

4x + 32 - 4 = 34 - 2x

4x + 28 = 34 - 2x

Collect like terms

4x + 2x = 34 - 28

6x = 6

Divide both sides by 6

x = 6 / 6

Value of x = 1

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a sample of n sludge specimens is selected and the ph of each one is determined. the one-sample t test will then be used to see if there is compelling evidence for concluding that true average ph is less than 7.0. what conclusion is

Answers

For the sample of n sludge specimens is selected and the conclusion and the pH of each one is determined.

Null hypothesis:

The null hypothesis will be rejected in favour of the alternative hypothesis only if sample evidence suggests that H0 is false. If the sample does not strongly contradict H0, we will continue to believe in the plausibility of the null hypothesis. The two possible conclusions from a hypothesis-testing analysis are then reject H0 or fail to reject H0.

A) Reject the null hypothesis. There is sufficient evidence that the true average pH is less than 7.0.

B) Reject the null hypothesis. There is sufficient evidence that the true average pH is less than 7.0.

C) Reject the null hypothesis. There is sufficient evidence that the true average pH is less than 7.0.

D) Reject the null hypothesis. There is sufficient evidence that the true average pH is less than 7.0.

E) Reject the null hypothesis. There is sufficient evidence that the true average pH is less than 7.0.

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In trapezoid MNPQ shown below, MN || QP , m


why m

Answers

In trapezoid MNPQ shown below, MN || QP ,

m < P = 85°

and

m < Q = 45°.

Find the measures of angles N and M.MNPQ is a trapezoid and therefore its opposite angles are supplementary.

We can use this fact and find the measures of angles N and M as follows: First, we notice that angles P and Q are supplementary since MN || QP. Therefore,

m∠Q + m∠P = 180°45° + m∠P = 180°m∠P = 180° - 45° = 135°.

We can use this information to find the measures of angles N and M. Let's call

m∠N = x

and

m∠M = y.

We can write two equations using the fact that opposite angles of a trapezoid are supplementary:

x + 135° = 180°

(opposite angles)

y + 45° = 180° (opposite angles)

Solving for x and y, we get:

x = 45° y = 135°

Therefore, m∠N = 45° and m∠M = 135°.

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consider the following solution of 9x-7= -70

what properties of equality can justify the two steps in the solution


A.addition and division property

B. addition and multiply property

C. subrtraction and mutiply property

D. subtraction and division property

Answers

The solution 9x - 7 = -70 can be solved using the following steps:

Step 1: Add 7 to both sides of the equation to isolate the variable term:

9x - 7 + 7 = -70 + 7

Simplifying:

9x = -63

Step 2: Divide both sides of the equation by 9 to solve for x:

9x/9 = -63/9

Simplifying:

x = -7

The properties of equality that justify the two steps in the solution are:

Step 1: Addition property of equality, which states that adding the same number to both sides of an equation produces an equivalent equation. In this case, we added 7 to both sides of the equation.

Step 2: Division property of equality, which states that dividing both sides of an equation by the same non-zero number produces an equivalent equation. In this case, we divided both sides of the equation by 9.

Answer:

A. Addition and division property

--------------------------

The first step involves addition of 7 to both sides and the second step involves division of both sides by 9.

They indicate the addition and division property of equality respectively.

Therefore correct choice is A.

Kelly can drive 45 miles on 5 gallons of gas. If Kelly keeps driving at this same rate, how far can she travel on 33 gallons of gas.
(A) 279
(B) 345
(C) 297
(D) 927

Answers

Answer:

(C) 297

Step-by-step explanation:

Write a proportion. 45 miles is to 5 gallons as x miles is to 33 gallons.

45 / 5 = x / 33

9 = x / 33

x = 297

HELP!!! Please solve this logarithmic equation for the value of the equation. Be sure to check for extraneous solutions. Thank you!

Answers

[tex]D:2x > 0\wedge x+2 > 0\\D:x > 0 \wedge x > -2\\D: x > 0[/tex]

[tex]\log_42x+\log_4(x+2)=2\\\log_4(2x(x+2))=2\\2x^2+4x=4^2\\2x^2+4x-16=0\\x^2+2x-8=0\\x^2+2x+1-9=0\\(x+1)^2=9\\x+1=3 \vee x+1=-3\\x=2 \vee x=-4[/tex]

[tex]-4\not\in D[/tex]

Therefore [tex]x=2[/tex].

match each expression to its value 2^5 3^3 4^3 6^2 (1/2)^4 (1/3)^2

Answers

The equivalent expressions are 32, 27, 64, 36, 1/16, 1/9 respectively.

Given are the numbers we need to simplify them,

2⁵ = 2·2·2·2·2 = 32

3³ = 3·3·3 = 27

4³ = 4·4·4 = 64

6² = 6·6 = 36

(1/2)⁴ = 1/2·1/2·1/2·1/2 = 1/16

(1/3)² = 1/3·1/3 = 1/9

Hence the equivalent expressions are 32, 27, 64, 36, 1/16, 1/9 respectively.

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write an integral that expresses the average monthly u.s. gas consumption during the part of the year between the beginning of april (t

Answers

The specific form of the function G(t) and the limits of integration would depend on the available data or assumptions about gas consumption during the specified months.

To express the average monthly U.S. gas consumption during the part of the year between the beginning of April and the end of September, we can set up an integral to calculate the average value of a function over a specific interval.

Let's denote the gas consumption as a function of time, G(t), where t represents the months from April to September. We'll integrate this function over the interval [April, September] to find the average gas consumption.

The integral that represents the average monthly U.S. gas consumption is:

(1 / (September - April)) ∫[April, September] G(t) dt

In this integral, G(t) represents the gas consumption in a given month, and the integration is taken over the interval from April to September. The average gas consumption is obtained by dividing the integral by the length of the interval (September - April).

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What is the range of the following: 68, 56, 40, 10, 51, 15

Answers

Answer:58

Step-by-step explanation:

The range of a set of numbers is the difference between the largest and smallest numbers in the set.

To find the range of the following set of numbers: 68, 56, 40, 10, 51, 15

First, we need to find the largest and smallest numbers in the set.

The largest number is 68 and the smallest number is 10.

So, the range is:

68 - 10 = 58

Therefore, the range of the set of numbers is 58.

In a regular polygon (all sides and angles are equal-sized), the measure of each exterior angle is 12.5%
of the measure of each Interior angle.
Write and solve an equation to find m, the measure of each exterior angle.
Equation
Answer

Answers

Using the given information, the measure of each exterior angle in the polygon is 20°

Measure of angles in a polygon

From the question, we are to determine the measure of each exterior angle in the polygon

Let the number of sides in the polygon be n.

Sum of exterior angles in a polygon = 360°

Thus,

Measure of one exterior angle = 360°/n

From the given information,

The measure of each exterior angle is 12.5% of the measure of each interior angle

The measure of each interior angle = (n - 2)180° / n

Thus,

360°/n = 12.5% of (n - 2)180° / n

360° = 12.5% of (n - 2)180°

Solve for n

360° = 0.125 × (n - 2)180°

360° =  (n - 2)22.5°

360° = 22.5n° - 45°

22.5n° = 360° + 45°

22.5n° = 405°

n = 405°/22.5°

n = 18

Then,

Measure of each exterior angle = 360° / 18

Measure of each exterior angle = 20°

Hence, the measure of each exterior angle is 20°

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A force of 60 newtons is applied to a 10 cm² surface. The force applied is then increased by 15 newtons and the surface area is increased by 15 cm². Shayna says "The pressure decreases by more than 40%" Is Shayna correct? Yes/No yes, You must show how you get your answer. Show your working h pressure = force area​

Answers

No, Shayna is not correct. Here's the calculation:

Initial pressure (P1) = Force (F1) / Area (A1)
P1 = 60 N / 10 cm² = 6 N/cm²

Increased force (F2) = 60 N + 15 N = 75 N
Increased area (A2) = 10 cm² + 15 cm² = 25 cm²

New pressure (P2) = Force (F2) / Area (A2)
P2 = 75 N / 25 cm² = 3 N/cm²

Percentage decrease in pressure = ((P1 - P2) / P1) * 100
Percentage decrease = ((6 N/cm² - 3 N/cm²) / 6 N/cm²) * 100 = 50%

The pressure decreases by 50%, not more than 40%.

ANSWER ASAP
What is the volume of the smaller cylinder?

Answers

V = 1000

Put the sides together: 4/6

Cube the sides (for volume you cube): 64/216

Then put the volume across from the side that has that volume: 64 x

----- = -----

216 3375

Cross multiply.

It should then equal this: 216x=216000

Divide by 216 and then you find x, which in other words the volume

x = 1000

During a second term examination a boy scored the following marks arithmetic 89percent english60percent you a 80percent general paper 96 percent and social studies 89percent what was his average mark

Answers

To find the average mark of the boy, we need to add up all of his scores and divide by the total number of subjects.

Average mark = (89% + 60% + 80% + 96% + 89%) / 5

= 414% / 5

= 82.8%

Therefore, the boy's average mark is 82.8%. It's worth noting that this calculation assumes that all subjects have equal weight, which may not always be the case in real-life scenarios. If different subjects have different weightings, the calculation of the average mark would need to take this into account.

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Kyle is tossing bean bags at a target. So far, he has had 22 hits and 14 misses. What is the experimental probability that Kyle's next toss will be a hit?

Answers

The experimental probability that Kyle's next toss will be a hit is 11/18 or approximately 0.61.

The experimental probability of Kyle's next toss being a hit can be calculated by dividing the number of hits by the total number of tosses. In this case, the total number of tosses is the sum of hits and misses, which is 22 + 14 = 36. Therefore, the experimental probability of Kyle's next toss being a hit is 11/18 or approximately 0.61.
To find the experimental probability of Kyle's next toss being a hit, you need to consider the number of hits and total tosses so far.
Hits: 22
Misses: 14
Total tosses: 22 hits + 14 misses = 36 tosses
Now, calculate the experimental probability by dividing the number of hits by the total number of tosses:
Experimental probability = Hits / Total tosses = 22 / 36
Simplify the fraction:
Experimental probability = 11/18
So, the experimental probability that Kyle's next toss will be a hit is 11/18.

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Answer:

11/18

Step-by-step explanation:

Given: △STQ,
ST = TQ,
SD ⊥ TQ ,
m∠1=32°
Find: m∠S, m∠T, m∠Q

Answers

The angles in the triangle are as follows:

m∠S = m∠Q = 58°

m∠T = 64°

How to find the angles of a triangle?

The unknown angles in the triangle can be found as follows:

In the triangle STQ, ST = TQ and SD is perpendicular to TQ.

Therefore, let's find the unknown angles as follows:

Hence, base on ST = TQ, STQ is an isosceles triangle. Therefore,

m∠S = m∠Q

Therefore,

m∠Q = 180 - 90 - 32

m∠Q = 58 degrees

m∠S = m∠Q = 58 degrees

Finally,

m∠T = 180 - 58 - 58

m∠T = 64 degrees

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Kevin makes muffins. It takes 8 minutes to mix the batter. The muffins bake for 17 minutes. The muffins then cool for 5 minutes. What is the total amount of time, in minutes, Kevin spends mixing, baking, and cooling the muffins? Enter your answer in the box. minutes

Answers

Answer: THE TOTAL AMOUNT TAKEN BY KEVIN IN MIXING, BAKING, AND COOLING THE MUFFINS IS 30 MINUTES.

Step-by-step explanation:

1. AMOUNT TAKEN BY KEVIN FOR MIXING=8MIN.

2. AMOUNT TAKEN BY KEVIN FOR BAKING=17 MIN.

3. AMOUNT TAKEN BY KEVIN FOR COOLING=5MIN.

IN TOTAL, (8+17+5)MIN. = 30 MIN.

Answer:

30 minutes

Step-by-step explanation:

8+7  =15 +5=20+ another 10 = 30

PLS HELP!! (No working needed)
1 - |x-5| if x>5

2- |x-5| if x<5

3- y=|x| translated two units upward.


Please solve quickly! Due on Monday tmr

Answers

The solution to the given absolute value problems is:

1) x > 0 and x < 0

2) x > 0 and x < 0

3) y = |x| + 2

How to solve Absolute Value Functions?

The absolute value which is also referred to as modulus | x | of a real number x is the non-negative value of x without any regard given  to its sign. For example, the absolute value of 4 is 4, and the absolute value of −4 is also 4. The absolute value of a number may be referred to as its distance from zero along real number line.

1) |x - 5| if x > 5

Using the concept of absolute value functions, we have:

For (x - 5) if x > 5: x > 0

For -(x - 5) if x > 5: x < 0

Thus, the solution is: x > 0 and x < 0

2) |x - 5| if x > 5

Using the concept of absolute value functions, we have:

For (x - 5) if x > 5: x > 0

For -(x - 5) if x > 5: x < 0

Thus, the solution is: x > 0 and x < 0

3) When we translate a function by two units upwards, then it means that we add 2 to the function.

Thus, we have:

y = |x| + 2

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Why did the congruent triangles get caught cheating?

Answers

because their sides were corresponding.

answers:

1. aas (g).

2. sas (h).

3. sss (n).

4. asa (s).

5. hl (c).

6. none - aaa (t).

7. asa (0).

8. none - ssa (d).

9. aas (i).

10. sas (w).

11. sss (p).

12. hl (r).

13. asa (e).

The radius r of a sphere is increasing at the uniform rate of 0.3 inches per second. At the instant when the surface area S becomes 100pi square inches, what is the rate of increase, in cubic inches per second, in the volume V?

Answers

The rate of increase in the volume V is 30π cubic inches per second when the surface area S becomes 100π square inches.

What is volume?

Volume refers to the amount of three-dimensional space occupied by an object or a substance.

To find the rate of increase in the volume V of a sphere when the surface area S becomes 100π square inches, we need to use the formulas relating the surface area and volume of a sphere to its radius.

The surface area S of a sphere is given by the formula:

[tex]S = 4\pi r^2,[/tex]

where r is the radius of the sphere.

The volume V of a sphere is given by the formula:

[tex]V = (4/3)\pi r^3.[/tex]

To find the rate of increase in volume with respect to time, we need to differentiate the volume formula with respect to time.

Given that the radius r is increasing at a uniform rate of 0.3 inches per second, we can write:

dr/dt = 0.3 inches per second.

Now, let's differentiate the volume formula with respect to time:

[tex]dV/dt = d/dt [(4/3)\pi r^3].[/tex]

Using the power rule of differentiation, we get:

[tex]dV/dt = (4/3)\pi * 3r^2 * (dr/dt).[/tex]

Simplifying further, we have:

[tex]dV/dt = 4\pi r^2 * (dr/dt).[/tex]

Since we want to find the rate of increase in cubic inches per second, we need to express the volume in cubic inches.

Substituting the value of the surface area S = 100π square inches into the surface area formula:

[tex]100\pi = 4\pi r^2.[/tex]

Dividing both sides by 4π, we get:

[tex]r^2 = 25.[/tex]

Taking the square root of both sides, we find:

r = 5.

Now, we can substitute the value of r into the rate of increase formula:

[tex]dV/dt = 4\pi(5^2) * (0.3).[/tex]

Simplifying the expression:

dV/dt = 4π(25) * 0.3.

dV/dt = 30π cubic inches per second.

Therefore, the rate of increase in the volume V is 30π cubic inches per second when the surface area S becomes 100π square inches.

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At first, a tank was completely filled with water. A pump was turned on for some time to drain water from the tank. The line graph shows the volume of water in the tank over 40 minutes.
a)how much water was drained out of the tankin one minute
b)how long will it take for the water to be drained out of the tank completely?
see the attachment below.​

Answers

10 liters of water was drained out of the tank in one minute and it would take 80 minutes to completely drain the water

How much water was drained out of the tankin one minute

This is the slope of the graph


From the graph, we have

(x, y) = (0, 800) and (40, 400)

So, we have

Slope = (400 - 800)/(40 - 0)

Evaluate

Slope = -10

This means that 10 liters of water was drained out of the tank in one minute

How long for the water to be drained out of the tank completely?

From (a), the equation of the line would be

y = -10x + 800

When the water is completely out, we have

-10x + 800 = 0

So, we have

x = 80

This means that it would take 80 minutes

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