To find the average, add up all ur numbers and divide by how many numbers there are.
(85+70+60+66+72+63+50) / 7 = 466/7 = 66.57
(4x - y = 3) * 9
36x - 9y = 27
7x - 9y = -2
29x = 29
x = 1
y = 4*1 - 3
y = 1
Answer:
234
Step-by-step explanation:
Steps:
1. Do a proportion
2/3 times x/12
2. Do 12 times 2=24
3. Divide 24 by 3
4. Your answer is 8 girls
Or you could do it this way
Steps:
1. You could have just multiplied the 2 by a 4 to get 8.12 boys divided by 3 boys is 4. That means you multiple the two by 4 to get the girls.
Yes it is a function. As x increases by one, y constantly increases by 4. The function would me y=4x+4
