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hichkok12 [17]
3 years ago
11

If f(x) = 8x2-5, what is f(-1)

Mathematics
2 answers:
Klio2033 [76]3 years ago
5 0

Step-by-step explanation:

Remember math is a language

f(x) : A function of x where x can be <em>any</em><em> </em>number including a number you choose

when you see f(-1), this tells you what the function is at <em>this</em> given x value. So you substitute - 1 wherever you see x

8(-1)2 - 5

Nikolay [14]3 years ago
4 0

Answer:3

Step-by-step explanation:

Simply plug in -1 for anywhere you see x in the equation so...

8(-1)^2-5

8(1)-5

8-5

3

Hope this helps

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Robin ran 5 and 3/4 miles last week. She ran 4 and 1/10 miles this week. How many more miles did she run last week?
AlladinOne [14]

5.75 - 4.1 = 1.65
8 0
4 years ago
Use the distributive property to wrtie an expression that is equivalent to 8(a+4)
marta [7]
If you are using the distributive property you multiply the 8 on the outside to each inside number. This would leave you with 8a+32. Since there are no other numbers provided I believe that would be your answer.
5 0
3 years ago
The length of a rectangle is 5 less than twice the width. If the perimeter of the rectangle is 146 cm, find the dimensions of th
Marta_Voda [28]

Length = 2x - 5

Width = x

Perimeter = 146

P = 2L + 2W

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Did you follow?

4 0
3 years ago
If <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bw%7D%7By%7D%20%3D%20%5Cfrac%7By%7D%7Bz%7D%20then%20what%20is%20the%20value%20of%2
faltersainse [42]

The value of x in the given expression is; x = wz/y

<h3>How to change subject of formula?</h3>

We are given the expression;

w/x = y/z

Now, we want to find the value of x which means we want to make x the subject of the formula. Thus;

Multiply both sides of the given expression by x to get;

(w/x)*x = (y/z)*x

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Now, multiply both sides by z/y to get;

w(z/y) = (xy/z) * (z/y)

wz/y = x

Thus, the value of x in the given expression is;

x = wz/y

The correct question is;

If w/x = y/z, then what is the value of x

Read more about Subject of Formula at; brainly.com/question/10643782

#SPJ1

5 0
2 years ago
Meg has a can that contains 80% of orange juice and the rest water. The can has 1 liter of water.
Anestetic [448]
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A) I am not sure Sorry.
7 0
3 years ago
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