Which of the following are solutions to the quadratic equation below? Check all that apply x^2 +7x -8 =0
1 answer:
You might be interested in
Answer:
12.53
Step-by-step explanation:
∠BCA = (180°-40°)/2 = 70°
Laws of Sines: CA/sin 40° = AB/sin 70° = 5/sin 70°
CA = 5/sin 70° * sin 40° = 3.40
area of semicircle CA = (3.1416 * 1.70²) / 2 = 4.54
By Heron's Formula, area of triangle ABC:
1/4 √(a+b+c) (a+b-c) (b+c-a) (c+a-b) = 1/4 * √13.4*3.4*3.4*6.6
= 7.99
Entire region area = 4.54 + 7.99 = 12.53
First, add 1 on both sides of the equation to begin to isolate x
x/5 = 8
Now, to isolate x, multiply both sides of the equation by 5/1
· 
= 
= x
x= 7 · 5/1 = 7 · 5 = 35
x = 35
x/5 = 8
Now, to isolate x, multiply both sides of the equation by 5/1
x= 7 · 5/1 = 7 · 5 = 35
x = 35