Eva spent $11.61 downloading songs, each song cost $1.29. four students wrote and solved equations to find s, the number of songs that she downloaded. which student wrote and solved the equation correctly?
a. seba’s work
1.29s=$11.61
s=10
b. ari’s work
$1.29s=$11.61
s=9
c. erick’s work
s/$1.29=11.61
s=14.98
d. daniel’s work
s/$1.29=$11.61
s=9

Option B.

Step-by-step explanation:

Let

s-----> the number of songs that Eva downloaded

we know that

The linear equation that represent the situation is

Solve for s

Divide by 1.29 both sides

therefore

Ari's work is correct

17   x 256=4352

sorry if this is wrong, i'm new.

step-by-step explanation:

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