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Lunna [17]
3 years ago
7

If an input is -9 what is the output for y = x(to the 2nd power) + 3?

Mathematics
1 answer:
Whitepunk [10]3 years ago
6 0

Answer:

Step-by-step explanation:

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I need help on question 2 i need the simplified answer and the restrictions
Anastaziya [24]

Answer:

x cannot be 5 or -3.

\frac{x+5}{x+3}

Step-by-step explanation:

The restrictions for a fraction is that the bottom cannot be 0.

So if we find when the bottom is 0 we have found the values that x cannot be.

Let's solve x^2-2x-15=0.

Since the coefficient of x^2 is 1 all we have to do is find two numbers whose product is -15 and whose sum is -2.

Those numbers are -5 and 3 since (-5)(3)=-15 and (-5)+(3)=-2.

So the factored form of the equation is:

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

This means either x-5=0 or x+3=0.

We do have to solve both.

x-5=0 can be solved by adding 5 on both sides.

x-5+5=0+5

x+0=0+5

x=5

x+3=0 can be solved by subtracting 3 on both sides.

x+3-3=0-3

x+0=0-3

x=-3

So x can be any number except x=5 or x=-3.

We already factored the bottom as (x-5)(x+3).

The top is a difference of squares, x^2-a^2,

which can be factored as (x-a)(x+a).

So the top factors as (x-5)(x+5).

The fraction can then be written as:

\frac{x^2-25}{x^2-2x-15}=\frac{(x-5)(x+5)}{(x-5)(x+3)}

This can further simplified assuming x is not 5 we can write it as \frac{x+5}{x+3}.  I canceled the common factor of (x-5).

5 0
3 years ago
Describe proportional relationships
irga5000 [103]

the constant of proportionality

Step-by-step explanation:

proportional relationships are relationships between two variables where there are ratios equivalent. another way to think about them is that in a proportional relationship that one variable is always constant value times the other that constant is known as the constant of proportionality

4 0
3 years ago
HELP DUE IN 20 MINS!<br><br><br>m∠c =?? degrees<br><br><br>° m∠d =?? degrees
dimaraw [331]

Answer:

<c = 45°

<d = 90°

I am not sure okay....this ia sq right?

6 0
3 years ago
Read 2 more answers
I NEED THIS ANSWER ASAP
telo118 [61]

Answer:

3 quarts and 3 cups

Step-by-step explanation:

4 cups=1 quart

Capacity: 5x4+2=22 cups

Right now 1x4+3=7

22-7=15 cups

12/4 +3

3 quarts and 3 cups more

6 0
3 years ago
Lisa can paint a wall in four hours. Sissi needs eight hours to paint the wall. How long will it take if they are helped?
never [62]

Answer:

It will take very less time actually. we cannot say accurately because if two girls start to chat they will till next day

4 0
2 years ago
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