Because your numbers are simple in this question, you can look at it this way...
You know how many cookies are needed for 15 students but you need to fiqure out how many for 30 students. The ratio between 15 to 30 is a 1:2, AKA double. THis means that you can simply double the known number of cookies and it will give you the amount that you need for double the people.
Your answer is 90 cookies.
Answer:
n = 55/8
Step-by-step explanation:
The total number of dancers in the school is 150.
Answer:
24 square feet
Step-by-step explanation: There are four "triangles" of the rhombus. If you find the area of each triangle by multiplying the height by the width and divide by two, you get 6. You then multiply that by 4 to get 24.
60% Black 40% white
18 / 30 = .6 or 60%
White would have to be 40% then.