MATHEMATICS MIDDLE SCHOOL

Which function is equivalent to y=x2-10x+9? A: Y=(x+5)^2+16
B: Y=(x-5)^2-16
C: Y=(x-5)^2+16
D: Y=(x+5)^2-16

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

Given

y = x² - 10x + 9

Using the method of completing the square

add/subtract (half the coefficient of the x- term)² to x² - 10x

y = x² + 2(- 5)x + (- 5)² - (- 5)² + 9

= (x - 5)² - 25 + 9

= (x - 5)² - 16 → B

Answer 2

Answer:

Figure out the equation for each of the multiple choice.

Then you will get the answer .

For example:

a. (x+5)(x+5) +16

= x^2 + 5x+5x+25+16

= x^2+10x+41

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5x divided by 6 = 20

Solve for y. 8x+6y=10. Please show steps

Answers

8x+6y=10
-8x -8x
6y=-8x+10
/6 /6 /6
y=(-8/6)x+(10/6)

Solve kx + 12 = 3kx for x.

Answers

Answer: x=6/k

Step-by-step explanation:

kx + 12 = 3kx and subtract k from both sides

12=3kx-kx then simplify

12=2kx, now divide both sides by two

12/2=kx simplify again

6=kx divide next

6/k=x finally, switch sides to get x=6/k

Hope this helps, have a BLESSED and wonderful day, as well as a safe one!

-Cutiepatutie ☺❀❤

$kx+12=3kx \n12=2kx \nx=(12)/(2k) \nx=(6)/(k)$

Hope this helps.

tim is saving to buy a new cell phone that costs $84. if he saves $12 each month, in how many months will he have $84?

Answers

$\$84\ :\ \$12= (84)/(12) =7\n\nAns.\ 7\ months$

well, divide 84 by 12
84/12 is 7. so, it will take him 7 months

Four friends went scuba diving. According to the following statements, who spotted sea life at the fastest rate?Lance saw 4 reef sharks in 6 minutes.

Jasmine saw 6 sea cucumbers in 8 minutes.

Robert saw eleven jellyfish in fifteen minutes.

Shilpa saw 8 pencil urchins in ten minutes.

Answers

Lance: 4/6 = 2/3 = 0.66 creatures every minute

Jasmine: 6/8 = 3/4 = 0.75 creatures every minute

Robert: 11/15 = 2.2/3 = 0.73 creatures every minute

Shilpa: 8/10 = 0.8 creatures per minute

Shilpa spotted sea life at the fastest rate (0.8 creatures every 1 minute)

mary has 12 marbles. 3/12 marbles. are yellow and 2/12 of the marbles are blue. The rest of the marbles are green. how many marbles are green??explain how you know.

Answers

This simply means that 3 out of the 12 are yellow and 2 out of 12 are blue. So add the blue and yellow together to get 5, then subtract 5 from 12 and get 7. There is 7 green marbles

3+2=5 12-5=7the answer is 7 are green

What is that answers ? please