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3 years ago

I Need Help with my homework. It’s due tomorrow and i don’t know anything about algebra

Mathematics

2 answers:

Arlecino [84]3 years ago

7 0

The number in the parenthesis will be your x value so you can just plug them in the equation given to you and solve.

In number 1, g(x) = -5x + 2. 1a gives you g(-1). That -1 inside that g(-1) will be your x.
g(-1) = -5(-1) + 2
g(-1) = 5 + 2
g(-1) = 7

For 1b, you have g(-2) so you plug -2 everywhere the x is.
g(-2) = -5(-2) + 2
g(-2) = 12

For 3a, you have a different equation: x^2 + 4x - 1 and you have g(-4). Not a problem though just plug -4 into all the places x is at and solve.
g(-4) = -4^2 + 4(-4) - 1
= 16 - 16 - 1
= -1

Hope this helped

kow [346]3 years ago

5 0

Simply plug a in for x where f(a) means x=a

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yuradex [85]

Answer:

15 seats

Step-by-step explanation:

It is given that section A of a theater contains 12 rows of 15 seats each.

Now, it is also given that section B contains only 10 rows it has an equal number of seats the same as section A.

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3 years ago

For all values of x

Yuliya22 [10]

Answer:

A.) gf(x) = 3x^2 + 12x + 9

B.) g'(x) = 2

Step-by-step explanation:

A.) The two given functions are:

f(x) = (x + 2)^2 and g(x) = 3(x - 1)

Open the bracket of the two functions

f(x) = (x + 2)^2

f(x) = x^2 + 2x + 2x + 4

f(x) = x^2 + 4x + 4

and

g(x) = 3(x - 1)

g(x) = 3x - 3

To find gf(x), substitute f(x) for x in g(x)

gf(x) = 3( x^2 + 4x + 4 ) - 3

gf(x) = 3x^2 + 12x + 12 - 3

gf(x) = 3x^2 + 12x + 9

Where

a = 3, b = 12, c = 9

B.) To find g '(12), you must first find the inverse function of g(x) that is g'(x)

To find g'(x), let g(x) be equal to y. Then, interchange y and x for each other and make y the subject of formula

Y = 3x + 3

X = 3y + 3

Make y the subject of formula

3y = x - 3

Y = x/3 - 3/3

Y = x/3 - 1

Therefore, g'(x) = x/3 - 1

For g'(12), substitute 12 for x in g' (x)

g'(x) = 12/4 - 1

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g'(x) = 2.

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3 years ago

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madam [21]

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2 years ago

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scoundrel [369]

Answer:

Step-by-step explanation:

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