<span>n Billy's class, 75% of his classmates had brown hair. 18 of his classmates had brown hair. What's the total number of students in his class?</span>

8 0

3 years ago

Terrance used this expression to find the final price, in dollars, of a hat that is discounted 30% off the original price of $20

Vlad [161]

Answer:

20-0.7

Step-by-step explanation:

7 0

3 years ago

What is the value of n?<br> 8.4×10 = (2×104) (42×10")

rjkz [21]

Answer:

n=2

Step-by-step explanation:

8.4(107)=2(104)(42(10n))

84000000=840000(10n)

Step 1: Flip the equation.

840000(10n)=84000000

Step 2: Divide both sides by 840000.

840000(10n)

840000

84000000

840000

10n=100

Step 3: Solve Exponent.

10n=100

log(10n)=log(100)(Take log of both sides)

n*(log(10))=log(100)

log(100)

log(10)

n=2

Answer:

n=2

4 0

2 years ago