Hiroshi spends 30 minutes on history homework, 60 minutes on english homework, and x minutes on math homework. one fourth of his total homework time is spent on math. which equation can be used to find the amount of time hiroshi spends on his math homework?

1/4(30+60+x) = x

Step-by-step explanation:

x is the amount of time Hiroshi spends on his math homework.  The total amount of time he spends on homework is given by the expression

30+60+x (30 minutes for history, 60 minutes for English and x minutes for math).

1/4 of this amount would be found by multiplying by 1/4:

1/4(30+60+x)

We're told that 1/4 of the total is the amount of time he spends on math.  This means it equals x:

1/4(30+60+x) = x

To solve this, combine like terms in parentheses:

1/4(90+x) = x

Multiply both sides by 4 to cancel the fraction:

1/4(90+x)*4 = x*4

90+x = 4x

Subtract x from each side:

90+x-x = 4x-x

90 = 3x

Divide both sides by 3:

90/3 = 3x/3

30 = x

He spends 30 minutes on math homework.

Its A. 1/4(x + 30 + 60) = x

Step-by-step explanation:

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99

answer is  

a.

p = 78

step-by-step explanation: