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Ainat [17]
2 years ago
13

What are the x-intercepts of y=x^2+2x-15

Mathematics
1 answer:
Sedbober [7]2 years ago
8 0

Answer:

(-5,0) and (3,0)

Step-by-step explanation:

Think about it.

What two numbers multiply to -15 and add up to 2?

The answers are 5 and -3.

So plug that into the factored form of a parabola.

y=(x+5)(x-3)

To find the x-intercepts, plug in 0 for y.

(x+5)(x-3)=0

Since we are multiplying, at least one of the terms has to equal 0.

x+5=0 \\ x-3=0 \\ \\ x=-5,3

So the x-intercepts are (-5,0) and (3,0).

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Answer:

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Step-by-step explanation: Hopes this helps :)

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2 years ago
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Ms. Canton has a book case. On three of the shelves there are the same amount of books. On another shelf there are four of her f
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Answer:

y = 3x + 4

Step-by-step explanation:

According to the given question, the expression to represent all the books in Ms. Canton's bookcase is shown below:-

y indicates the total amount of books

x indicates the equal cost of books on 3 bookshelves

while

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So, the expression will be

y = 3x + 4

Therefore the correct answer is y = 3x + 4

3 0
3 years ago
Which statement correctly compares the two functions? A. They have the same end behavior as x approaches [infinity], but they ha
OLga [1]

Answer:

A. They have the same end behavior as x approaches [Infinity], but they have different x- and y- intercepts.

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The x and y intercepts in mathematics can depict more than one function. They can have same end behavior as x approach. The x and y intercepts can be different for the two functions.

5 0
3 years ago
CAN SOMEONE PLEASE ANSWER THIS ASAP FOR BRAINLIEST!!!
Leviafan [203]

Answer:


Step-by-step explanation:

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5 0
3 years ago
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A ball is thrown into the air. The height h, in feet, of the ball after x seconds is given by the function h = −16(x − 2)2 + 72.
Annette [7]

Answer:

Step-by-step explanation:

h = −16(x − 2)² + 72

 =  −16((x − 2)(x − 2)) + 72                   expand the square  (x - 2)² =  (x - 2)(x - x)

 =  -16 ((x)(x) + (x)(-2) + (-2)(x) + (-2)(-2)) + 72

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  =   -16x²  + 64x  - 64 + 72

  =   -16x²  + 64x  + 8              My guess is D   ; 72 ???

I have no clue what the  ; 72 means after the given answer.  It must be a standard form thing I never learned.

4 0
3 years ago
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