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const2013 [10]
3 years ago
12

Evaluate each expression if x = 5 7x

Mathematics
2 answers:
UkoKoshka [18]3 years ago
8 0

Answer:

7x=35

Step-by-step explanation:

7x means 7 times x if x equals 5 then 7*5 is 35.

Vladimir79 [104]3 years ago
3 0

Answer:

=7x

Now,

Putting the value of x= 5 then we get,

=7×5

=35

Hope this helps u

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Let f(x) = x2 − 81. Find f−1(x).
Umnica [9.8K]
F(x) = x² - 81

Finding f⁻¹(x) the inverse function

Let y = f(x) and solve for x.

y = x² - 81

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x² = y + 81

x = √(y + 81)

Recall f(x) = y, that means x = f⁻¹(y)

x = √(y + 81)

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Answer:

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Step-by-step explanation:

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A gravel company sells gravel by the cubic yard and charges a flat delivery fee. The table shows the total cost C based on the a
Sergio039 [100]

Answer:

<h2>$60.</h2>

Step-by-step explanation:

The cost for 0 cubic yards of gravel refers to the y-intercept of the function.

First, we find the constant ratio of change

r=\frac{284-124}{7-2}=\frac{160}{5}=32

The constant ratio of change is 32, that means the cost per cubic yard of gravel is $32.

Now, we just subtract this ratio twice to find the relations until we have x = 0.

124 -32= 92

So, for 1 cubic yard, the cost is $92.

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