MATHEMATICS MIDDLE SCHOOL

Solve for x and y
-2x-y=-9
5x-2y=-9

Answers

Answer 1
Answer:

we use equation 1 first.
-2x -y = -9 

 -y = -9 + 2x

y = 9 -2x

We substitute value of y in equation 2

5x - 2 (9 - 2x) = -9

5x -18 - 4x = -9

5x - 4x = -9 + 18

x = 18 -9

x = 9

We now find the value of y

-2x -y = -9

-2 (9) - y = -9

-18 - y = -9

-y = -9 + 18

y = 9 - 18

y = -9

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Solve for x
√(x - 2) = 0
​

Answers

To solve for x, you need to isolate/get x by itself in the equation:

√(x-2) =0       Square ² both sides to get rid of the square root √

(√(x-2) )^2=(0)^2

x - 2 = 0           Add 2 on both sides

x - 2 + 2 = 0 + 2

x = 2

Solve the quadratic equation by completing the square. 2x2 + 3x - 4 = 0

Answers

Answer: x = 0

Step-by-step explanation:

4 + 3x - 4= 0

3x=0 (divide both sides by 3)

x= 0/3

x = 0

Step-by-step explanation:

2 {x}^(2) + 3x - 4 = 0 \n 16 {x}^(2) + 24x - 32 = 0 \n 16 {x}^(2) + 24x + 9 = 41 \n {(4x)}^(2) + 2 * 4x * 3 + {(3)}^(2) = 41 \n {(4x + 3)}^(2) = 41 \n |4x + 3| = √(41) \n 4x + 3 = + - √(41) \n 4x = - 3 + - √(41) \n x = ( - 3 + - √(41) )/(4)

Write words to match the expression. 24- ( 6+3)

Answers

Words to match the expression 24 - (6 + 3) is given as follows:

"the difference of 24 and the sum of 6 and 3"

Answer: Twenty-four minus the sum of six and three

Happy to help!

The sales tax in Alex's city is 7.33%. He bought a video game system for $299, and 2 games each at $49 each. What was the TOTAL bill, to the nearest tenth?

Answers

299+2(49)
299+98
397

since u will add becuZ there is 7.33% then
0.0733(397)+397
29.1+397
426.1 are the total bill

The answer is $426.1. Hope I could help! :D

Which of the following ratios will form a proportion with
2
3

Answers

Answer:

you have to use cross-multiplication in order to find out the answer to this question.

Step-by-step explanation:

9/12 times 2/3

a cyclist travels at a rate of 1.8 kilometers per minute.How far will the cyclist travel in 48 minutes

Answers

48 minutes* (1.8 km/ 1 minute)= 86.4 km.
(Note that the unit cancels out so you get the answer)

The final answer is 86.4 km~
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