3 years ago

NEED HELP!!!!!!! I’LL GIVE 30 POINTS

Mathematics

1 answer:

Zolol [24]3 years ago

5 0

What grade are you in? just wondering bc the math

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What value for C will make the expression a perfect square trinomial x2-7x+c

Tom [10]

Answer:

The value of c is 12.25

Step-by-step explanation:

we know that

A perfect square trinomial is of the form

$(x-a)^{2}=x^{2}-2ax+a^{2}$

In this problem we have

$x^{2}-7x+c$

equate the equations

$x^{2}-7x+c=x^{2}-2ax+a^{2}$

we have

the following equations

$-7x=-2ax$ -----> equation A

and

$c=a^{2}$ -----> equation B

Solve the equation A

$-7x=-2ax$

$7=2a$

$a=3.5$

Solve the equation B

$c=a^{2}$

$c=3.5^{2}=12.25$

therefore

$(x-3.5)^{2}=x^{2}-7x+12.25$

The value of c is 12.25

7 0

3 years ago

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Help please !!!!!!!!!! I'll give brainly to whoever gets this correct

iris [78.8K]

The answer is B. It is shifted up by 6*1.5-2-2 with is 9-2-2=5.

5 0

2 years ago

Anna's toy car traveled 0.7 meters. Hector's toy car traveled 0.72 meters. Whose car traveled farther? Select from the drop-down

alexandr402 [8]

Answer:

When you do adding and subtracting with decimals just line up the decimal points and do the math regularly

0.72

-0.7

_____

0.02 meters further so Hector's car traveled farther

0.6

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_____

0.85 swam in total

Hope this helps

Step-by-step explanation:

3 0

3 years ago

Evaluate each value expression for the given value of x : 22-x/5 , x=20 HURY!!!!!!!!!!!

ozzi

Answer= 18

22-20/5
22-4
=18

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3 years ago

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Tomlin is removing the wallpaper the wallpaper covers 5 meter by 4 meter rectangular wall how much wallpaper will tomlin remove

Ksenya-84 [330]

Answer:

20 meters. I need to have 20

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3 years ago