What are the solutions to the equation x2 = 81? A. 40.5 only B. 40.5 and –40.5 C. 9 and –9 D. 9 only

Answers

Answer 1

Answer: $x^2=81\ then\ x=9\ and\ x=-9\n\nbecause:(-9)^2=81\ and\ 9^2=81$

$x^2=81\to x=-√(81)\ and\ x=√(81)\to x=-9\ and\ x=9$

Answer 2

Answer:

Answer:

C. 9 and -9

Step-by-step explanation:

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Ing page.1. y = 3xy = x + 4

40 divided [24-4 x (2+3)]

Answers

$(40)/(24 - 4 * (2 + 3)) =\ \textgreater \ (40)/(20 * (5)) =\ \textgreater \ (40)/(100)$

Final answer .40

What is 4.21 rounded to the nearest whole number?

Answers

The answer is 4 because you round down due to the .2 not being greater than 5

4 because the 21 is less than 50 so it goes straight to the 4

If 2 pounds of strawberries cost $4.50, how much would 3 pounds cost?

Answers

3 pounds cost $6.75

to help you, turn it into a fraction, 2 punds ove 2.50 equals 3 pounds over X

the correct answer is $ 13.50 because if you do 4.50 times 3 it then equals 13.50

∠R ___∠T Choose the relationship symbol that makes the statement true. < = >

Answers

"=" symbol makes the relationship true

Solution:

Given that we have to choose the relationship symbol that makes the statement true

Given statement is:

$\angle R\ --- \angle T$

Given symbols are : < , = , >

< means "less than" symbol

= means "equal to" symbol

> means "greater than symbol"

If we use, < or > symbol, then the statement becomes a inequality

For, a relationship to be true, L.H.S is equal to R.H.S

Example: a = b

Therefore, we have to use "equal to" symbol

$\angle R\ = \angle T$

Answer:

Step-by-step explanation:

I AM SO CONFUSED! Please Please help but explain the answer! I have been stuck for so long! Larry is planning to install a rectangular pool that is 6 feet shorter than it is wide. Larry wants to find its width if its area is 169 square feet. Which equation models this problem?

So I know that the length must equal W - 6, and that the area is 169. But, I only know how to find the width by dividing the area by the length (W = A/L). But I do not know the length. So I am kinda sorta really stuck. You do not need to solve this problem. I just need to know the equation to solve this problem. THANK YOU SO MUCH!!

Answers

Area equals length multiplied by width

A = L • W

We know that the length is 6 foot shorter than the width, so it would be:

A = (W – 6) • W

Your equation would be:

169 = (W – 6) • W

HELP twice a number plus twice a second number is 310. The difference between the numbers is 55. Find the numbers by writing and solving a system of equations. Explain how you solved the system. PLEASE HELP ME Thank you! I got numbers are 182.5 and 127.5 but I don't understand how to set up the system equations

Answers

The numbers by writing and solving a system of equations are 50 and 105

System of equations

Let the unknown numbers be x and y

If twice a number plus twice a second number is 310, then;

2x + 2y = 310

x + y = 155

x = 155 - y

Also, If the difference of the numbers is 55, hence;

x - y = 55

155 - y - y = 55

155 - 2y = 55

-2y = 55 - 505

2y = 100

y = 50

Substitute y = 25 into 1 to have:

x = 155 - 50

x = 105

Hence the numbers by writing and solving a system of equations are 50 and 105

Learn more on system of equations here: brainly.com/question/847634

Twice a number plus twice a second number is 310.
$2x + 2y = 310$

The difference between the numbers is 55.
$x-y = 55$

Divide the first equation by 2 to get a 3rd equation:
$x+y=155$

Add the second and third equations together:
$x-y=55$
$x+y=155$
$2x=210$
$x=105$

Put x=105 into the second equation to get:
$105-y=55$
$y=50$

So you're answers are x=105 and y=50.

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The cost of a pizza varies directly with thelength of the diameter. If a pizza with a12-inch diameter costs $8.64, how muchshould a pizza with a 16-inch diameter cost?

Jennifer has payments every three months for her health insurance. If each payment is 456, how much money should she budget for health insurance each month? Round to the nearest dollar

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