Which are the solutions of x2 = –7x – 8?

Answer

x= -7, -1

Step-by-step explanation:

x^2= -7x- 8

x^2+ 7x+ 8 =0

x+7=0       x+1=0

x=-7          x=-1

The answer is the fourth option.

Step-by-step explanation:

You start by converting the equation into standard form, resulting in x2+7x+8. You would then use the coefficients and plug them into the quadratic formula, [-(7)+√7(7)-4(1)(8)]/2 and [-(7)-√7(7)-4(1)(8)]/2. Simplified, this would become (-7+√49-32)/2 and (-7-√49-32)/2. After adding the numbers in the square root, you are left with (-7+√17)/2 and (-7-√17)/2

11

step-by-step explanation:

32.50-7.50=25

225/25=11

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.