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Hey there! I'm happy to help!

We have 5 numbers that will give us an average score of 80.

75,82,71,84,x

What we do is add these all up and divide by 5 to get 80. Let's go backwards to find x.

We multiply by 5.

80(5)=400

We subtract all of the numbers except for x.

400-75-82-71-84=88

Therefore, the score on the next test has to be 88 to have the student's average be 80.

Have a wonderful day! :D

Answer:

z = 8.2

Step-by-step explanation:

6.7z = 5.2z + 12.3

combine like terms by subtracting 5.2z from both sides

1.5z = 12.3

divide by 1.5

z = 8.2

Answer:

8.2

Step-by-step explanation:

5.2z+12.3=6.7z

12.3=6.7z-5.2z

12.3=1.5z

z=8.2

Answer:

see below

Step-by-step explanation:

5/10 divide ?/?= 1/2

5/10 divide by 5/5 = 1/2

2. 12/15 divide ?/? = 4/5

12/15 divide by 3/3 = 4/5

3. 10/12divide ?/? = 5/6

10/12 divide by 2/2 = 5/6

4. 14/18 divide ?/? = 7/9

14/18 divide by 2/2 = 7/9

Answer:

5x + 2y + 5z

Step-by-step explanation:

Step 1: Write out expression

3x + 4y + 5z + 2x - 2y

Step 2: Combine like terms (x)

5x + 4y + 5z - 2y

Step 3: Combine like terms (y)

5x + 2y + 5z

Answer:

Area of the trapezoid = 18 m²

Step-by-step explanation:

Formula to calculate the area of a trapezoid is,

Area of a trapezoid = [tex]\frac{1}{2}(b_1+b_2)h[/tex]

Where [tex]b_1[/tex] and [tex]b_2[/tex] are the parallel sides of the trapezoid

And h = distance between the parallel sides

From the figure attached,

[tex]b_1[/tex] = 5 m

[tex]b_2[/tex] = (6 + 1) = 7 m

h = 3 m

By substituting these values in the formula,

Area of a trapezoid = [tex]\frac{1}{2}(5+7)3[/tex]

                                 = 6 × 3

                                 = 18 m²

Therefore, area of the given trapezoid is 18 m².

Answer:

b. a personal or unreasoned judgment

Step-by-step explanation:

The answer is B because bias is basically something or someone that you favor over anything or anyone else. Or what you belving in your own opion.

As an example, our strong bias in favor for the idea, or a test biased towards people who are excellent at math.

Answer:

D

Step-by-step explanation:

if you don't believe me look up the definition

Replace g(x) with 16:

16 = 3x-2

Add 2 to both sides:

18 = 3x

Divide both sides by 3:

X = 18/3

X = 6

Hey there! I happy to help!

Here's how to find the distance between any two points.

Find the difference between the x values.

-4-3=-7

Square it.

-7²=49

Find the difference of the y values.

6-(-7)=6+7=13

Square that.

13²=169

Add up the two numbers you got.

169+49=218

And square root it.

√218≈14.76.

Have a wonderful day! :D

Answer:

379/100

Step-by-step explanation:

IS THIS IT???

Answer:

Step-by-step explanation:

25 324 796657

Answer:

Step-by-step explanation:

Given the vectors  u = (1, −1, −2) and v = (1, 1, 2),

projection of u on v is expressed as [tex]proj_v u = \dfrac{u*v}{|v|^2}*v[/tex]

u.v = (1, −1, −2).(1, 1, 2)

u.v = 1(1)+(-1)(1)+(-2)(2)

u.v = 1-1-4

u.v = -4

|v| = √1²+1²+ 2²

|v| = √1+1+4

|v| = √6

|v|² = (√6)²

|v|² = 6

[tex]proj_v u = \dfrac{-4}{6}*(1,1,2)\\proj_v u = (\dfrac{-4}{6}, \dfrac{-4}{6}, \dfrac{-4}{3} )[/tex]

Similarly for projection of v on u;

[tex]proj_u v = \dfrac{u*v}{|u|^2}*u[/tex]

|u| = √1²+(-1)²+ (-2)²

|u| = √1+1+4

|u| = √6

|u|² = (√6)²

|u|² = 6

[tex]proj_u v = \dfrac{-4}{6}*(1,-1,-2)\\proj_u v = (\dfrac{-4}{6}, \dfrac{4}{6}, \dfrac{4}{3} )[/tex]

Answer: x=6.67

Step-by-step explanation:

Since these parallelograms are similar, we can use proportions to solve for x.

[tex]\frac{15}{9} =\frac{x}{4}[/tex]              [cross multiply]

[tex]60=9x[/tex]            [divide both sides by 9]

[tex]x=6.67[/tex]

Now, we know that x=6.67.

Answer:

20/3

Step-by-step explanation:

9/4=15/x

cross multiply and get:

9x=15x4

9x=60

divide both sides by 9 so

x=60/9 which when simplified is equal to 20/3

Answer:

C

Step-by-step explanation:

The answer is 30% because 2/5 of the circle is shaded.

Answer:

v = 23.370 mph

Step-by-step explanation:

It is given that,

The world record for the 100 meter dash is finished in 9.572 seconds in Berlin. We need to find the Bolt’s average race speed in miles per hour.

We know that,

1 mile = 1.609 km

or

1 mile = 1609.34 m

⇒ 100 m = 0.0621 miles

1 hour = 3600 seconds

⇒ 1 second = (1/3600) hour

Average speed = distance/time

So,

[tex]v=\dfrac{\dfrac{100}{1609.34 }\text{miles}}{\dfrac{9.572}{3600}\ \text{hour}}\\\\v=23.36963\ \text{mph}[/tex]

or

v = 23.370 mph

Hence, Bolt’s average race speed is 23.370 mph.

Answer:

285!

Step-by-step explanation:

First you have to find out how may parts are produced in a single minute.

We know that 114 parts are produced in 6 minutes so to find how may parts are made in one minute divide 114 by 6 and get an answer of 19

114÷6=19

Now to find how may parts are produced in 15 minutes multiply 19 (number of parts produdced in one minute) by 15 and get an answer of 285!

19×15=285

Hope this helped! :)

Answer: q -> p

Step-by-step explanation:

just took the test

Answer:

$16.92

Step-by-step explanation:

Just divide 42.30 by 2.5 and it will give you the answer

Answer:

874.9022

hope this helps

The given decimal rounded to the nearest ten-thousandth is 874.9022.

Rounding a number means the process of making a number simpler such that its value remains close to what it was. The result obtained after rounding off a number is less accurate, but easier to use. While rounding a number, we consider the place value of digits in a number.

The given decimal number is 874.902237102.

The decimal is rounded to the nearest ten-thousandth is 874.9022.

Therefore, the given decimal rounded to the nearest ten-thousandth is 874.9022.

To learn more about the rounding off numbers visit:

brainly.com/question/13391706.

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Answer:

B

Step-by-step explanation:

Roots can also be represented as indicies (exponents) and thus should be treated like them. For example, square root could also be written as exponent 1/2.

When dealing with square roots in a equation, PEMDAS calls for this to be solved when you do B. Exponents

The root of a number is that number expressed exponentially by the root in inverted form. In other words, when you take something to its square root, you would be taking it to the inverse of 2 which is 1/2.

For instance:

√4 = 2 = 4¹/²

This means that you can then solve the square root when you deal with exponents which is the second step.

In conclusion, if you see an expression with square roots, PEMDAS allows you to solve it as an exponent.

Find out more at https://brainly.com/question/20687401.

Answer:

x=70

Step-by-step explanation:

180-45=2x-5

135=2x-5

135+5=2x

140=2x

x=70

Answer:35.18

Step-by-step explanation:

Did this 7 years ago

The required value of 42.5 – 7.32 is 35.18.

Subtraction of 7.32 from 42.5 to be determined

Subtraction is defined as the value that should be reduced to the subtraction value.

Here, subtraction of 7.32 from 42.5,
⇒ 42.5 - 7.32
= 35.18

Thus, the required value of 42.5 – 7.32 is 35.18.

Learn more about subtraction here:
https://brainly.com/question/13619104

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Answer:

  -1

Step-by-step explanation:

"Evaluate the expression for ..." means "put these numbers where these variables are and do the arithmetic."

  [tex]\sqrt{b}+\dfrac{25}{a}=\sqrt{16}+\dfrac{25}{-5}\\\\=4-5=\boxed{-1}[/tex]

Answer:

No, it's not a one-to-one function

Step-by-step explanation:

Given

[tex]f(x) = round(x)[/tex]

Required

Determine if this function is one-to-one

I'll answer this question using the following illustrations;

Assume x = 4.6

[tex]f(x) = round(x)[/tex] would be

[tex]f(4.6) = round(4.6)[/tex]

[tex]f(4.6) = 5[/tex]

Also assume x = 4.8

[tex]f(x) = round(x)[/tex] would be

[tex]f(4.8) = round(4.8)[/tex]

[tex]f(4.8) = 5[/tex]

More generally;

[tex]4.5 \leq\ x\leq\5.4[/tex]

Would result in:

[tex]f(x) = 5[/tex]

Since, there's a always a possibility of f(x) having one value for various values of input x, then we can conclude that the function is not a one-to-one function

The function f(x) = round(x) is not one - to - one since different input values of X could yield the same output.

For instance :

Given that x = 1.4

f(x) = round(x)

f(1.4) = round(1.4)

Output = 1 ( nearest integer)

Since, different input values of X could yield the same the output, then the function is not one - to - one.

Learn more : https://brainly.com/question/4483049?referrer=searchResults

Answer:

- 1 1/3 which is none of the answers loll

Answer:

-1 and 1/3

Step-by-step explanation: negative one and one third

Answer:a

Step-by-step explanation:

i think

Steps to solve:

5-3x/5

~Divide the numerator to the denominator

-3/5x + 1

Best of Luck!

Answer:

x= 105

Step-by-step explanation:

Let the unknown angle at the base be y.  We know the base angles of an isosceles triangle are the same

The sum of the angles of the triangles are

30 + y +y = 180

30 + 2y = 180

2y = 180-30

2y = 150

y = 75

We know that x+y = 180 since it forms a straight line

x+75 =180

x = 180-75

x = 105

Answer:The abc conjecture It is stated in terms of three positive integers, a, b and c (hence the name) that are relatively prime and satisfy a + b = c. So a conjecture is like an educated guess.