MATHEMATICS HIGH SCHOOL

What are the solutions to X2 + 8X + 7 = 0?

Answers

Answer 1

Answer:

Answer:

x = - 7, x = - 1

Step-by-step explanation:

Given

x² + 8x + 7 = 0

Consider the factors of the constant term (+ 7) which sum to give the coefficient of the x- term (+ 8)

The factors are + 7 and + 1 , since

7 × 1 = 7 and 7 + 1 = 8 , then

(x + 7)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 7 = 0 ⇒ x = - 7

x + 1 = 0 ⇒ x = - 1

Answer 2

Answer:

Answer:

$x=-1,-7$

Step-by-step explanation:

$x^2+8x+7=0$ where a $\neq$ 0 so a = 1 b = 8 c = 7

Quadratic Formula: $x=-b(√(b^2-4ac) )/(2a)$

$x=-8(√(8^2-4(1)(7)) )/(2(1))$

$x=-8(√(64-28) )/(2)$ Evaluate the exponent and multiply 4ac

$x=-8(√(36) )/(2)$ Subtract b^2 - 4ac and multiply 2a

$x=-8(√(6) )/(2)$ Solve for the sqrt root of 35

x = - 8 ± 6/2 =

x = - 8 + 6/2 = -1

x = - 8 - 6/2 = -7

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23.15 – [ 115 + ( 12 - 25)]

Answers

Answer:

-78.85

Step-by-step explanation:

Using Order of Operations (PEDMAS):

23.15 – [ 115 + ( 12 - 25)]

= 23.15 – [ 115 + (-13)]

= 23.15 – [ 115 - 13]

= 23.15 - 102

= -78.85

A skydiver is falling 176 feet per second. how many feet per minute is he falling?

Answers

So you would have to times 176 by 60 ,because of 60 seconds in a minute, and that would be 10,560 ft per minute

60 seconds in a minute so 179 times 60 equals 727 fpm

Can -2/5 be simplified

Answers

No it can't because nothing will go into 2 or 5 at the same time...

Konrad has $500 in a savings account at the beginning of the summer. He wants to have more than $200 in the account by the end of the summer. He withdraws $25 each week for food, clothes, and movie tickets. How many weeks can Konrad withdraw money from his account?

Answers

Answer:

Step-by-step explanation:

He has $500 to start with, and he takes $25 out of the account each week. But he wants more than 200 in his account by the end of summer. 25 goes into 500 20 times. But if he wanted more than 200 left, like 300-400, he could spend 4 week's worth of money to have 400 left, or 8 weeks to have 300 left. This is the best-case scenario.

What is the equation of the line that passes through the points (−2, 3) and (2, 7)?x − y = −1

x − y = −2

x − y = − 5

x − y = − 6

Answers

Hello,

y-3=(7-3)/(2+2)(x+2)==>y-3=x+2==>x-y=-5
Answer C

I have a math final tomorrow and I don’t know how to do this. Someone please help!

Answers

135+105=240
Divide by 2
120
Then 180-120=60

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