2. The ratio of boys to girls in the school
choir is 3:4. If there are 12 girls in the
choir, how many boys are in the choir?

There are 9 boys in the choir

Step-by-step explanation:

Boys : Girls = 3 : 4

Substitute in 12 for girls and represent new value for boys as x

3 : 4 = x : 12

Write as fractions

3/4 = x/12

Cross-Multiply (numerator * denominator / numerator * denominator)

3(12) = 4(x)

36 = 4x

Divide both sides of the equation by 4

x = 9

There are 9 boys in the choir

Hope this helps :)

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3

a - base

b - exponent

so,