4x+ 3y -2z=35, 2x-3y+z=-6, x+2y+3z=-5, solve for x,y and z

Answers

Answer 1

Answer: 1. X = \frac{35}{4}+\frac{\left( -3\right) \ Y}{4}+\frac{z}{2}$$

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Tonya had her birthday party at the movies.It cost $27 for pizza and $8.50 per friend for the movie tickets. How many friends did tonya have at her party if she spent $78

Answers

she can bring 6 friends to the movies.

Tonya had 6 friends, 27$ + 8.50$ x 6 = $78

Which expression has a value of 8? A. (4 + 4) ÷ (4 • 4) B. 4 + 4 ÷ (4 • 4) C. 4 + (4 ÷ 4) • 4

Answers

The answer would be C

A) (4+4)/(4x4)=(8)/(16)=1/2
B) 4+4/(4x4)=4+4/(16)=4+(1/4)=4 1/4
C) 4+(4/4)x4=4+(1)x4=4+4=8

The answer is C

Prove my answer

4+ (4/4).4

4+(1)(4)

4+4 = 8

I hope that's help !

three friends earned more than $200 washing cars. they paid their parents $28 for supplies and divided the rest of money equally. write an inequality to find possible amounts each friend earned. identify what your variable represents.

Answers

well on answer could be $238-$28=210 divided by 3 = $70 each
also another one is $208-$28=180 and then if u divide $180 by 3 u will get a awser of $60 each

Tell whether the 2 rates form a proportion:a) 28 points in 3 games, 112 points in 12 games
b) 32 notes in 4 measures, 12 notes in 2 measures
Show work if you can please :)

Answers

Final answer:

The rates 28 points in 3 games and 112 points in 12 games form a proportion, while the rates 32 notes in 4 measures and 12 notes in 2 measures do not form a proportion.

Explanation:

To determine whether the given rates form a proportion, we need to check if the ratios are equivalent. a) We'll start with 28 points in 3 games vs 112 points in 12 games. The ratio 28/3 equals approximately 9.33, and the ratio 112/12 also equals approximately 9.33. Since these ratios are equal, these rates do form a proportion. b) Moving to 32 notes in 4 measures vs 12 notes in 2 measures. The ratio 32/4 equals 8, and the ratio 12/2 equals 6. Since these ratios are not equal, these rates do not form a proportion.

Learn more about Proportion here:

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the perimeter of a rectangle is 24 inches.Twice the length decreased by three times the width is 4 inches. what are the dimensions of the rectangle?

Answers

Original = 8 length and 4 width

New = 8/2 = 4/2 = 2 is length and 4 is width.

Perimeter of new = 12

The diameter of a circular pool is 18 feet. What is the approximate area of the pool?

A.
56.52 square feet

B.
113.04 square feet

C.
254.34 square feet

D.
1017.36 square feet

Answers

The formula for the diametre of a circle is πr². This means we need to find the radius. The radius is half the diametre (9).

3.14 (9)² =
3.14 (81) =
254.34 square feet is your answer

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Find the percent equvalent to 18 over 30

7 divided by 798 for homework

For every 6 boys there are 8 girls. Write the ratio of boys to girls in simplest form.