3 years ago

Can someone help me with this question please

2 answers:

7 0

It's the second one -7x^2 because a quadratic equation needs to be squared and that's the only one that provides that, you can also find the differences of each equation to see if it's quadratic

Karo-lina-s [1.5K]3 years ago

7 0

The answer to this question is B -7x^2-x+2

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Please help! I will rank and thank! :)

Leokris [45]

Y=mx+b
since the variable that will increase or deacrease is the number of books
then we set it to x
x=number of books
the member fee is constant so
b=10
the amount of money will increase by 5.99 per book so
m=5.99

the total amount of money will be our function since it depends on x
y=total amount of money
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6 0

3 years ago

8/2z=15/60 .solve proportion.

masya89 [10]

$\frac{8}{2z}=\frac{15}{60}\ \ \ \ \ |cross\ multiply\\\\2z\cdot15=8\cdot60\\\\30z=480\ \ \ \ |divide\ both\ sides\ by\ 30\\\\\boxed{z=16}$