explain how to solve 5+7z=19​

Answer:

square roots

quadratic formula

factoring

complete the square

Step-by-step explanation:

1. In the first one, we can divide both sides by -2 and then square root it, getting x^2 = -98 so x = 7i \sqrt(2).

2. We can use the quadratic formula to find out the second one.

3. We can factor 4x^2 - 21x - 18 = 0 and get (x + 6)(4x - 3).

4. In the last one, we can complete the square, getting (x + 9)^2 + 16.

Answer:

35 degrees

Step-by-step explanation:

2x+13+10x=145

2x+10x+13=145

12x+13=145

12x=145-13

12x=132

X=11

2×+13

(2×11)+13

22+13=35

x^2 = 81/100

Let's take the square root of each side

x = 0.9 and -0.9

Answer:

The decimal is 0.125

Step-by-step explanation:

The greatest common factor (GCF) of 1 and 8 is 1. Convert 1/8 to its simplest form by dividing the numerator and denominator by its GCF and you get

1/1=1

-   -

8/1= 1 over eight

Answer:

73.3

Step-by-step explanation:

50mi/h * 5280ft/mi * 1h/3600s = 220/3 = 73.3 ft/s

Answer:

73 1/3 feet per second

Step-by-step explanation:

50 miles per hour

50*5280/3600 = 73 1/3 feet per second

Answer: 79000 i hope this helps and pls mark me as brainliest

Answer:

The total number of seconds in a year is 32,000,000 when rounded to the nearest million. It is 31,500,000 when rounded to the nearest hundred thousand.

Step-by-step explanation:

Which could be the total number of seconds in a year?

A.

31,092,000 seconds

B.

31,476,000 seconds

C.

31,536,000 seconds

D.

31,592,000 seconds

2. A television network counted 1,771,548 viewers watching the golf tournament on its channel. There were 5,861,014 viewers watching a football game on another channel.

Round each number to the nearest hundred thousand.

About how many viewers were watching the two events on television?

A.

7,500,000

B.

7,600,000

C.

7,700,000

D.

8,000,000

3. The longest bridge in the world is located in China. It is164,800 meters long. Another bridge in China is 69,732 meters long.

Round each length to the nearest ten thousand to find the answer.

What is the approximate difference between the lengths of the two bridges?

4. Amber is solving this problem.

252

× 605

What are the partial products Amber will need to solve the problem?

A.

1,260 and 151,200

B.

1,260 and 1,512

C.

1,260 and 15,120

D.

1,260 and 2,520 and 151,200

5. A rectangular garden with a width of 42 feet has an area of 2,814 square feet.

What is the length of the garden?

6. Which number sentences show how to solve the problem?

Sasha’s family donated 12 boxes of canned vegetables to the food pantry. There are 24 cans in each box. Three boxes are filled with canned peas; the rest are filled with canned corn. How many cans of corn did Sasha’s family donate to the food pantry?

Choose all answers that are correct.

A.

12 – 3 = 9 and 9 × 12 = 108

B.

12 – 3 = 9 and 9 × 24 = 216

C.

3 × 24 = 72 and 3 × 12 = 36 36 + 72 = 108

D.

12 × 24 = 288, 3 × 24 = 72, and 288 – 72 = 216

7. There are 15 rows of diamond rings in a case in the jewelry store. There are 24 rings in each row. Another case has 12 rows of rings with a variety of colored stones and has 18 rings in each row.

How many more diamond rings than rings with colored stones are in the jewelry store?

8. The florist has 195 carnations and 127 daisies. She uses them to make 14 bouquets. Each bouquet has the same number of flowers.

How many flowers are in each bouquet?

9. Which statements are true about the value of the digits in the number 5,555,555?

Choose all answers that are correct.

A.

The digit in the thousands place is 1/5 the value of the digit in the ten thousands place.

B.

The digit in the hundred thousands place is 1/10 the value of the digit in the millions place.

C.

The digit in the ten thousands place is 10 times the value of the digit in the thousands place.

D.

The digit in the hundreds place is 50 times the value of the digit in the tens place.

10. Carlos says there are a total of 6,000 hundreds in the number 6,000,000.

Is Carlos correct?

A.

Yes, Carlos is correct.

B.

No, Carlos is not correct. There are exactly 600 hundred thousands in 6,000,000.

C.

No, Carlos is not correct. There are exactly 600 thousands in 6,000,000.

D.

No, Carlos is not correct. There are exactly 6,000 thousands in 6,000,000.

Answer: Domain is [tex][0,\infty)[/tex] and range is [0,4000].

Step-by-step explanation:

It is given that, the set of ordered pairs (t,d), where

t = the time in seconds after  someone jumps out of a plane at  4000 meters to go skydiving

d = is the displacement above the  ground.

It means t is independent variable and it is represented on the x-axis.

d is dependent variable and it is represented on the y-axis.

We need to find the domain and Range.

Domain is the set of input values.

Here, input is time and time can not be negative.

Domain [tex]=0\leq t=[0,\infty)[/tex]

Range is the set of output values.

Here, output is displacement above the  ground which can not be negative or more than 4000 meters.

Range [tex]=0\leq d\leq 4000=[0,4000][/tex]

Therefore, domain is [tex][0,\infty)[/tex] and range is [0,4000].

Answer:

17

Step-by-step explanation:

use distance formula [tex]\sqrt{(x_1-x_2)^{2}+(y_1-y_2)^{2} }[/tex]

[tex]\sqrt{(7-(-8))^{2}+((-3)-5)^{2} }[/tex]

simplify

[tex]\sqrt{(7+8)^{2}+(-3-5)^{2} }[/tex]

[tex]\sqrt{(15)^{2}+(-8)^{2} }[/tex]

[tex]\sqrt{225+64}[/tex]

[tex]\sqrt{289}[/tex]

solve the square root

[tex]17[/tex]

Answer:

a/c = a/c

Step-by-step explanation:

That is, if a, b, and c are real numbers such that a = b and c ≠0, then

a/c = a/c

The property state that c≠0 because division by zero does not exist.

The Division Property of Equality says that for every real number a, b, and c, if a = b and c ≠ 0, then a/c = b/c.

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions.

/ Division operation: Divides left-hand operand by right-hand operand

For example 4/2 = 2

When "a" and "b" are divided, the outcome of the division is the amount of "a" that each of the "b" items will receive.

Therefore, if there are 20 pens and 5 students, the amount of mangoes that each student would receive is 20 ÷ 5 or 4, or 4 pens.

When a number is divided, it can be thought of as being divided equally into a total of x parts, where x is the number of parts into which the given number is divided.

The Division Property of Equality says that for every real number a, b, and c

if a = b and c ≠ 0, then a/c = b/c.

The property state that c ≠ 0 because division by zero does not exist.

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Answer: A Person's age is usually considered a discrete variable.

Step-by-step explanation: lets say a person was born in November 2000 and the date is currently September 2020 if asked their age the person would say 19 because they have not turned 20 yet. therefore no matter what date anytime between their 19th birthday up until their 20th birthday they would say they are 19 making age a discrete variable.

Answer:

Step-by-step explanation:

Answer:

Talk to a teacher

Step-by-step explanation:

Answer:

x¹=-6 x²=0

Step-by-step explanation:

Substitute y =0

Swap sides

Factor expression

Split into possible cases

Solve equation

Answer:

its b

Step-by-step explanation:

i litteraly just did that

Answer:

D

Step-by-step explanation:

Since it is an equal sign you want to know when the will have the same amount of money. Also, the person who has $90 must save $9 a week as well because both those numbers are on the same side of the equation and vice versa.

Answer:

see below

Step-by-step explanation:

1)

[tex]m+13=-2\\\\m+13-13=-2-13\\\\m+0=-15\\\\m=-15[/tex]

2)

[tex]0=p+7\\\\p+7=0\\\\p+7-7=0-7\\\\p+0=-7\\\\p=-7[/tex]

3)

[tex]5n=75\\\\\frac{1}{5}(5n)= \frac{1}{5}(75)\\\\n=15[/tex]

4)

[tex]-7=\frac{m}{10} \\\\10(-7)=10(\frac{m}{10} )\\\\-70=m\\\\m=-70[/tex]

5)

[tex]-1=7+r\\\\r+7=-1\\\\r+7-7=-1-7\\\\r+0=-8\\\\r=-8[/tex]

6)

[tex]-42=14v\\\\\frac{1}{2}(-42)= \frac{1}{2} (14v)\\\\-21=7v\\\\\frac{1}{7}(-21) =\frac{1}{7}(7v)\\\\-3=v\\\\v=-3[/tex]

7)

[tex]80=-8p\\\\8(10)=-8p\\\\\frac{1}{-8}(8(10))= \frac{1}{-8} (-8p)\\\\-10=p\\\\p=-10[/tex]

8)

[tex]\frac{x}{4} =-8\\\\4(\frac{x}{4} )=4(-8)\\\\x=-32[/tex]

9)

[tex]13=\frac{x}{2} \\\\2(13)=2(\frac{x}{2})\\\\26=x\\\\x=26[/tex]

10)

[tex]-1=n-15\\\\n-15=-1\\\\n-15+15=-1+15\\\\n+0=14\\\\n=14[/tex]

Answer:

It will move to the top.

Step-by-step explanation:

The liquid with the lowest density will move to the top. Therefore, option B is the correct answer.

Given that, there are liquids of different densities together in a container.

We need to determine what will happen to the liquid with the lowest density.

The density, of a substance, is its mass per unit volume.

The density of a liquid determines whether it will float on or sink in another liquid. A liquid will float if it is less dense than the liquid it is placed in. A liquid will sink if it is denser than the liquid it is placed in.

Now, the liquid with the lowest density will move to the top.

Therefore, option B is the correct answer.

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Answer:

10x-5

Step-by-step explanation:

You subtract 15x-5=10x. Then you do -7+2. The 7 is negative . So it would be -7 plus two. So it would equal -5. So it's 10x-5

Answer:

2+x

Step-by-step explanation:

Let the unknown number be x

Increase = +

[tex]2+x[/tex]

Answer:

Lead coeficcent: -3 term 7

Step-by-step explanation:

7 is the only constant and -3 is the grates coeficcent.

Answer:

1. 5/10

Step-by-step explanation:

Since the options are in fractions, you have to mave 0.5 into a fraction. It is 5 tenths so 5/10 which is 1/2.

The first one is 5/10

1 x 5 = 5

2x 5 =10

So this is equivalent Since there is only one answer, you don't have to try out the rest, thankfully ;)

Hopw this helps :)

Answer:

1.5/10 is the answer

Answer:

5x+8

Step-by-step explanation:

[tex]\frac{15x+24}{3} =\frac{15x}{3} +\frac{24}{3} =5x+8[/tex]

Answer:

5x+8

Step-by-step explanation:

Answer:

(-7,0)

Step-by-step explanation:

Answer:

The midpoint would be (-7,0)

Step-by-step explanation:

Answer:X=3

Step-by-step explanation:We simplify the equation to the form, which is simple to understand  

7+x-(3+32/8)=3

Simplifying:

7+x-(3+4)=3

Simplifying terms in parentheses

7+x-(+7)=3

Remove unnecessary parentheses

7+x-7=3

We move all terms containing x to the left and all other terms to the right.  

+1x=+3-7+7

We simplify left and right side of the equation.  

+1x=+3

We divide both sides of the equation by 1 to get x.  

x=3

Answer:

$13,200

Step-by-step explanation:

You need to use the simple interest formula

I = P * r * t

I = Interest accrued

P = Principal amount invested

r = Interest rate          you need to divide by 100 to get it in decimal form

t = time, in years        if you are given a partial year, divide the months by 12

P = $12,000                                    

r = 7.5% = .075                                    

t = 1                                                  

But, because we want I to equal $990 then I is

I = $990

So we ignore our P and instead solve for the P that will give us the desired result.

I = P * r * t

$990 = P * .075 * 1

$990 = P.075        Divide each side by .075

$990/.075 = P.075/.075

$990/.075 = P

$13,200 = P

So, to earn an annual interest income of $990, $13,200 will have to be invested in the 7.5% bond.

The $13,200 amount should be invested in the 7.5% bond.

It is required to what amount should be invested in the 7.5% bond.

What is simple interest ?

Simple Interest (S.I.) is the method of calculating the interest amount for a particular principal amount of money at some rate of interest.

Given that:

A total of $12,000 is invested in two corporate bonds that pay 7.5% and 9% simple interest.

We know that,

I = P * r * t

P = $12,000                                    

r = 7.5% = .075                                    

t = 1                                                  

I = $990

So to ignore our P and instead solve for the P that will give us the desired result.

I = P * r * t

$990 = P * .075 * 1

$990 = P.075    

Divide each side by .075

$990/.075 = P.075/.075

$990/.075 = P

$13,200 = P

Therefore, $13,200 amount should be invested in the 7.5% bond.

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Answer:

x=-9/13

Step-by-step explanation:

x+9=-12x

13x=-9

x=-9/13

please mark it as brainliast

x = - 9/13

Hi there !

x + 9 = - 12x

     →      ←

x + 12x = - 9

13x = - 9

x = - 9/13

Good luck !

The final temperature is -3 Degrees.

Answer:

x= 5

Step-by-step explanation:

20x + 7 - 4x = 87

you start by combining like terms = 20x - 4x = 16x

16x + 7 = 87

next you want to isolate the variable so you would subtract 7 from both sides .

16x + 7 = 87

      -7 .   -7

16x = 80

then you divide by 16 on each side

x = 5

Answer:

x=5

Step-by-step explanation:

Subtract 4x from 20x.

16x + 7 = 87

Move all terms not containing x to the right side of the equation.

Subtract

7

from both sides of the equation.

16x = 87 − 7

Subtract 7 from 87.

16x = 80

Divide each term by 16 and simplify.

x=5