Answer:
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
Answer: y = 11
Step-by-step explanation:
first, i collected the like terms.
7y + 9 = 4y + 42
then, i moved the terms.
7y - 4y + 42 - 9
then, i collected the like terms and calculated it.
3y - 33
finally, i divided both sides.
y = 11
Answer:
256 cm^2
Step-by-step explanation:
2 of triangulars can be together to become a new square.
because these 2 triangulars have a symmetric shape.
So the all area is 10×16 (the square in the center) + (6×16)
All area is 160 + 96
= 256 cm^2
* the formular of the square area is the width × the length
Answer:
9/3
Step-by-step explanation:
9/3 = 3
