D. 140 cm, because 5 x 4=20 and 20 x 7 is 140.
No the answer is 1 3/4 one and the fraction 3/4 because the 2 with the exponent 3 is 8 so 15-8 =7 divided by 4. so 4 only goes in 1 time so it is 1 3/4. hope that helps
x²+3x = 9x - 8
Subtract 9x on both sides
x² - 6x = -8
Add 8 on both sides
x² - 6x + 8 = 0
Now you need to find the factors of 8(numbers that multiply to equal 8) that add or subtract to -6.
Factors of 8: 1, 2, 4, 8
2 and 4 add up to 6, if they are both negative they equal -6.
(x - 2)(x - 4) = 0
x - 2 = 0
x = 2
x - 4 = 0
x = 4
x = 2, x = 4
Answer:
b or d
Step-by-step explanation: