MATHEMATICS HIGH SCHOOL

Which of the following values is a solution of 3|5 + x| = 12? A. 7

B. 1

C. –9

D. –17

Answers

Answer 1
Answer: It is easiest to simply just substitute any of the choices into the original equation and see which one satisfies the equation.

Given the equation: 3 * |5 + x| = 12

Using choice A. x = 7
3 * |5 + 7| = 12
36 =/= 12

Using choice B. x = 1
3 * |5 + 1| = 12
18 =/= 12

Using choice C. x = -9
3 * |5 + -9| = 12
12 = 12

Therefore, the correct answer is C. -9

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Answers

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-4x + 9 = -7x - 12 +7x +7x 3x + 9 +12 -9 -9 3X 3 ------ = ------ 3 3 x= 1 What is the error or is there no error ?

Answers

Answer:

Okay, I think you mean't 4x-9=6x+12.

Step-by-step explanation:

x=-7

Which of the following equations is an equation formed when completing the square on y 2 - 12y = -27?(y - 6) 2 = -27
(y - 6) 2 = 9
(y + 6) 2 = 9

Answers

Answer:  The correct option is

(B) (y-6)^2=9.

Step-by-step explanation:  We are given to select the equation that is formed when completing the square on the following equation :

y^2-12y=-27~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

We will be using the following formula :

a^2-2ab+b^2=(a-b)^2.

From equation (i), we have

y^2-12y=-27\n\n\Rightarrow y^2-2* x*6=-27\n\n\Rightarrow y^2-2* x* 6+6^2=-27+6^2\n\n\Rightarrow (y-6)^2=-27+36\n\n\Rightarrow (y-6)^2=9.

Thus, the required equation that is formed is(y-6)^2=9.

Option (B) is CORRECT.
Hello,

You should write y²-12y=-27 or y^2-12y=-27

y²-12y=-27
==>y²-2*6y+6²=-27+36
==>(y-6)²=9
(second answer)

Robert makes $4.00 an hour when he works overtime.how much does he for 3 1/4 hours of overtime work?

Answers

Okay, to find that out, ignore the 3 in the 3 1/4 for now. So 1/4 right? Is 25% right? Out of four, 4/4 is? One. So bring back the three, do 3*4=12, so it equals: 13$ . not a good job right?

Solve the inequality. Enter the answer as an inequality that shows the value of the variable; for example f > 7, or 6 < w. Where necessary, use <= to write and use >= to write . x + 4 > 13

Answers

x + 4 > 13 would equal to x > 9
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