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cricket20 [7]
3 years ago
11

Please help!!! 15 points

Mathematics
1 answer:
12345 [234]3 years ago
6 0
It should be C according to my knowledge
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If f(x + 2) = 6x2 + 5x − 8. Find f(6).
Blababa [14]

Answer:

  108

Step-by-step explanation:

We can rewrite f(x+2) to make it easier to evaluate:

  f(x+2) = (6x +5)x -8

Since we want f(6), we want x+2 = 6, or x=4.

  f(6) = (6·4 +5)·4 -8 = 29·4 -8

  f(6) = 108

6 0
3 years ago
How many square feet of outdoor carpet will we need for this hole?
QveST [7]
The whole ends up being 42 ft².

Area of a triangle = 1/2 * base * height. 
So that lil triangle piece is 1/2 * 2 * 3 = 1/2 * 6 = 3

Now we do the rectangle piece. Area of a rectangle = length * width
So that rectangle is 3 * 7 = 21

If you take away those two, you are left with a trapezoid. 
Area of a trapezoid is 1/2 * (base 1 + base 2) * height
Base 1 is the width of the rectangle which is 3. Base 2 is the 6. The height is the given 11 feet minus the 7 feet from the length of the rectangle which is 4. 

Plug all this in to the formula you get 1/2 * (6 + 3) * 4 = 1/2 * 9 * 4 = 1/2 * 36 = 18.

Now add all of your areas together;

21 + 3 + 18 = 24 + 18 = 42 
7 0
3 years ago
Read 2 more answers
Given x=-3, y=6, and z=-4 xz/-2y
zimovet [89]

Answer:

-1

Step-by-step explanation:

sub in the values of x, y and z into the equation

you get:

(-3)(-4)/(-2)(6)

= 12/-12

= -1

8 0
3 years ago
Read 2 more answers
The difference between the squares of two consecutive numbers is 23. what are the two numbers?
Ksju [112]

(x+1)^2-x^2=23

x^2+2x+1-x^2=23

2x+1=23

2x=22

x=11

11^2 = 121

x+1 =12

12^2=144

144-121 = 23

4 0
3 years ago
A phone has 5/8 of its battery charge left. If the battery loses 3/8 of its full charge every hour, how many hours will the batt
Marianna [84]

Answer:

An hour and 45 minutes

3 0
3 years ago
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