We're trying to find the missing PERCENT (out of the whole 100%). In a proportion the cross-products are equal: So 3 times 100 is equal to 4 times the PERCENT. The missing PERCENT equals 100 times 3 divided by 4. (Multiply the two opposite corners with numbers; then divide by the other number.)
Answer:
Step-by-step explanation:
7x-8y=-12
4x(-4x+2y)=3x4
7x-8y
=-9
-4x+2y
7x-8y=-12
-16x+8y=12
-9x=0
x=0
0-8y=-12
y=12/8=3/2=1.5
Answer:
25girls
Step-by-step explanation:
4b=5g
20b=25g
4b/20b=5g/?
5g x 20b=100
100/4b=25g
#of guests waitstaff tip
10 18
20 36
30 54
40 72
50 90
<span>If the tip varies directly with the number of guests, which equation represents the relationship between the tip, t, and the number of guests, g?
t = 1.8g t = g/18 g = 1.8t g = t/18
</span>
18/10 = 1.8
36/20 = 1.8
54/30 = 1.8
direct variation: <span>t = 1.8g</span>