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Aneli [31]
3 years ago
6

Over which interval is the graph of f(x) = –x2 3x 8 increasing?

Mathematics
2 answers:
Pepsi [2]3 years ago
6 0
Since you were able to type that negative, I will assume that
f(x)=-x^2+3x+8

the vertex is where the graph changes from increasing to decreasing or vice verca

find theh vertex
-b/2a is x coordinate of vertex where
f(x)=ax^2+bx+c


a=-1
b=3
-3/2(-1)=-3/-2=3/2

we see that the leading coeficient (a) is negative so the graph opens down
it increases then decreases at the vertex

so from negative infinity to 3/2 is interval

in interval nottaion
(⁻∞,3/2]
mr Goodwill [35]3 years ago
3 0

Answer:A.(-%,1.5)

Step-by-step explanation:

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The perimeter of a rectangle is 60 m and its length is twice its width. find the length of the rectangle
GREYUIT [131]
Length = 2W

P= 2L + 2W
60 = 2(2W) + 2W
60= 4W +2W
60 = 6W
60/6W = 6W/6W
w = 10
Length = 2(10)
Length = 20

P= 2L + 2W
60= 2(20) + 2(10)
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60 = 60
4 0
2 years ago
What's the difference between partial variation and direct variation​
shepuryov [24]

Answer:

<u>Direct Variation is a relation that is of the form y = mx.</u>

and

<u>Partial Variation is a relation that is of the form y=mx+b</u>

Explanation:

This is a simple way to see the difference between them.

<em>Hope This help you!</em>

8 0
3 years ago
The amount $180.00 is what percent greater than $135.00?
svp [43]
It would be: 180/135 * 100 = 36/27 * 100
= 4/3 * 100
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In short, Your Final Answer would be 33.33%

Hope this helps!
5 0
3 years ago
Read 2 more answers
Solve by completing the square.
enot [183]

Answer:

x^2 -8x -5 = -3

x^2 -8x -2 = 0

We complete the square by:

1) Moving the "non X" term to the right:

x^2 -8x  = 2

2) Dividing the equation by the coefficient of X²

The coefficient of x is 1 so we don't do anything

3) Now here's the "completing the square" stage in which we:

      • take the coefficient of X

that is -8

     • divide it by 2

-8 ÷ 2 = -4

     • square that number

-4*-4 = 16

     • then add it to both sides of the  equation.

x^2 -8x +16 = 2 +16

That becomes

(x -4)^2 = 18

we take the square root of both sides:

(x -4) = sqr root (18)

x1 = sqr root (18) +4

AND

(x+4) = sqr root (18) -4

x1 =  sqr root (18) +4 = 4.2426406871  + 4 = 8.2426406871

x2 = sqr root (18) -4 =  = 4.2426406871  - 4 = .2426406871

       

Step-by-step explanation:

8 0
3 years ago
HURRYY!!!!! Which algebraic expression means “three more than a number squared”? 2 n + 3 2 n minus 3 n squared + 3 n squared min
stiv31 [10]

Answer: (n+3)^2

Step-by-step explanation:

This is the answer lol

7 0
3 years ago
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