Answer:
18 girls
Step-by-step explanation:
6:9
6+9 = 15
we multiply each part of the ratio by 3
6*3 = 18 girls
9*3 = 27 boys
Answer:
x is 4 when y is 180
y is 540 when x is 12
Step-by-step explanation:
The first working out is correct, z = 3
-294 is the difference between the highest and lowest number
Answer:
77
Step-by-step explanation:
Let's let the unknown number be x.
Supplementary angles add up to a total of 180 degrees. Since we already know one angle is 103, this means that:

Subtract 103 from both sides:

So, the measure of its supplementary angle is 77 degrees.
And we are done!