3 years ago

Multiply. Write your answer as a fraction in simplest form.

Mathematics

2 answers:

viva [34]3 years ago

7 0

Answer:

no worries :)

Step-by-step explanation:

Leviafan [203]3 years ago

7 0

Answer:-45

Step-by-step explanation:

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Josie's last four test scores in math were 82 89 92 87. what score on her next test will give her an average of 89 or above

liraira [26]

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3 years ago

Mischief Campbell math class lasts 45 minutes. Math class starts at 9:05. what time does math class end?

zhuklara [117]

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The correct answer is 9:50.

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3 years ago

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

<u>Solve the equation A</u>

$-7x=-2ax$

$7=2a$

$a=3.5$

<u>Solve the equation B</u>

$c=a^{2}$

$c=3.5^{2}=12.25$

therefore

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

The value of c is 12.25

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