QUESTION 1 If you pay $5,250 for a simple interest note that will be worth $6,500 in 21 months, what annual simple interest rate will you earn?
12.4%
13.6%
15.8%
14.3%

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply

-1   1/6.   you dont subtract the denominators

step-by-step explanation: