3.) What are the solutions to x^2 + 8x + 7 = 0?x = –8 and x = –7

x = –7 and x = –1

x = 1 and x = 7

x = 7 and x = 8

Answers

Answer 1

Answer: check if x = -8 is the solution
1. substitute number -8 for x in the equation
(-8)^2 + 8*(-8) + 7 = 0
2. do calculations on the left size
64 -64 + 7 = 0
7 = 0
3. equality means x is the solution, inequality means it is not
-8 is not the solution to x^2 + 8x + 7 = 0

check other given numbers the same way
x=-7
(-7)^2 + 8*(-7) + 7 = 0
0=0
-7 is the solution

x=-1
(-1)^2 + 8*(-1) + 7 = 0
0=0
-1 is the solution

x=1
(1)^2 + 8*(1) + 7 = 0
16=0
1 is not the solution

x=7
(7)^2 + 8*(7) + 7 = 0
113=0
7 is not the solution

x=8
(8)^2 + 8*(8) + 7 = 0
135=0
8 is not the solution

answer:
The solutions to given equation are -7 and -1.

Answer 2

Answer: The answer to this question is
-7+-1=-8
-1+-7=8
1+7=8

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Answers

the answer is D
hope it helps edgenuity im assuming

If each side of a triangle is doubled, than find the ratio of area of the new triangle than formed and the given triangle. a. 4 : 1 b. 1 : 4 c. 2 : 1 d. 1 : 2

Answers

Answer:

Step-by-step explanation:

If each side is double the ratio of the area of the new and the given will 4;1

How do I simplify this?

Answers

Don't get too involved in the 'simplify' part just yet.
It doesn't mean make the problem easier.
It means that when you have the answer, make sure it's in simplest form.
That's why it says "Simplify your answer".
Notice that that's the 2nd instruction.
There's nothing to simplify until you have an answer.

The first thing you have to do here is find the area of a triangle.
Do you remember that formula ?
I'll bet you do.
The area of a triangle is (1/2) · (length of the base) · (height) .

The height and the length of the base are given, right there
in the picture. Take those, and use them to find the area.

Once you've multiplied the binomials, don't forget about the (1/2).

Finally, you have a trinomial for an answer.
Put the big sweet cherry on top: Factor it !
I think that's the 'simplify' part.

You may be surprised.
I was when I worked it out just now ... just for you.

What is the circumference of this circle?2 cm
about 3 centimeters
about 13 centimeters
about 22 centimeters
about 35 centimeters

Answers

About 13 cm

circumference = 2 * pi * radius

Answer:

Option B

Step-by-step explanation:

C = 2πr where r is radius as given.

Let us take pi as 3.14

C = 2* 3.14* 2 = 12.56 cm

About 13 cm

Seven less than twice a number is greater then five more than the same number. which integer satisfies this inequality? 1
2
12
13

Answers

13
just use trial and error. PLUS since *the integer x 2* needs to be greater than that *integer + 5*, you already know that the number needs to be greater than 5.

Initially a pool contains 350 gallons of water. A hose is placed in the pool and the water is turned on. The hose adds 5.2 gallons of water per minute. Give the total amount, V, of water in the pool for x, the number of minutes the hose has been on. A. V(x) = 5.2x B. V(x) = 350x - 5.2 C. V(x) = 350x + 5.2. D V(x) = 5.2x + 350

Answers

The amount of water that is turned in a minute is 5.2d. Given the fact that initially was 350 gallons of water everything you pour needs to be added to the initial amount. So the answer is V(x) = 350+5.2x (D). I hope that this is the answer that you were looking for and it has helped you.

Answer:

Step-by-step explanation:

V(x) = 5.2x + 350

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