The ratio of boys to girls in a choir is 3 to 6. There are 30 girls in the choir. How many members are in the choir?

45 members are in the choir.

Step-by-step explanation:

Set up an equation:

Variable x = boys

3/6 = x/30

Cross multiply:

3 × 30 = 6 × x

90 = 6x

Divide both sides by 6:

15 = x

There are 15 boys.

To find the number of members in the choir, add the number of boys and girls:

30 + 15 = 45

45

Step-by-step explanation:

boy to girls ratio is 3:6 so girls is the 6 in that ratio. 30 divided by 6 equals 5. So we multiply 3 by 5 which is 15. The we add 30+15 which is 45.

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°