Answer:
x ≈ - 4.12 , x ≈ 0.12
Step-by-step explanation:
Given
2x² + 8x - 1 = 0 ( add 1 to both sides )
2x² + 8x = 1 ← factor out 2 on the left side
2(x² + 4x) = 1
To complete the square
add/ subtract (half the coefficient of the x- term )² to x² + 4x
2(x² + 2(2)x + 4 - 4) = 1, that is
2(x + 2)² - 8 = 1 ( add 8 to both sides )
2(x + 2)² = 9 ( divide both sides by 2 )
(x + 2)² = ( take the square root of both sides )
x + 2 = ± = ± = ± ( subtract 2 from both sides )
x = - 2 ± 1.5 , thus
x = - 2 - 1.5 ≈ - 4.12 ( to 2 dec. places )
x = - 2 + 1.5 ≈ 0.12 ( to 2 dec. places )
This simple interest calculator calculates an accrued amount that includes principal plus interest. The equation is <span>A = P(1 + rt). Given the details provided, </span>A = $ 885.00
The calculation: First, converting R percent to r a decimal
r = R/100 = 6%/100 = 0.06 per year, then, solving our equation
A = 750(1 + (0.06 × 3)) = 885
A = $ 885.00
The total amount accrued, principal plus interest, from simple interest on a principal of $ 750.00 at a rate of 6% per year for 3 years is $ 885.00.
Answer:
it is c :)
Step-by-step explanation:
Homework = 12.5% of 24 hours = 0.125 x 24 = 3 hours
Sam spent <u>3 hours</u> on homework.
Proportion of the time spent on homework = 3/24 = 1/8
Answer: Same spent 1/8 of his day on homework.
No, 2 x 7 is 14 which is even.