There are 12 girls in one of the fifth grade classes. The number of girls is two-thirds the number of boys, b. The number of boys can be found using the equation 2/3b=12. How many boys are in the class?
2/3b=12
b = 12 / (2/3)
b = 12 * (3/2)
b = 36/2
b = 18
if i bought a dress that cost 55.00 dollars and the sales tax was 8% exatcly how much will the dress cost?
what is 11/12 , 1/12 ,1/6 and 5/6 in decimal and percent simplest form?
36
To find the number of boys in the class, we need to solve the equation 2/3b = 12.
Step 1: In the equation, we have 2/3b. To isolate b, we need to get rid of the fraction. We can do this by multiplying both sides of the equation by the reciprocal (or multiplicative inverse) of 2/3, which is 3/2. This will cancel out the fraction.
(3/2) * (2/3b) = (3/2) * 12
Simplifying, we get:
1b = 18
Step 2: Since 1 multiplied by any number is that number, we can simply write:
b = 18
Therefore, there are 18 boys in the fifth-grade class.