Let v = number of video's she bought
Let c = number of CD's she bought
v+c=16
1495v+1688c=9355
Multiply both sides of (1) by 1495
and subtract (1) from (2)
-1495v-1495c=-8970
193c=386
c=2h
Answer: 30%
Step-by-step explanation:
percentage = (discount/total amount)
* 100= (8.40/28)*100=30%
Answer:
63.72 ft^2
128 cm^2
Step-by-step explanation:
5. The area of a triangle is
A = 1/2 bh where b is the base and h is the height
A = 1/2(21.6) * (5.9)
= 63.72 ft^2
6. The scale factor is 20/15 = 4/3
When we find area is the scale factor is squares
(4/3) ^2 = 16/9
Taking the ratio of the areas
A big trap
------------------- = scale factor squared
A little trap
A big trap 16
-------------- = ------
72 9
Using cross products
9A = 16*72
9A = 1152
Divide each side by 9
A = 1152/9
A =128
The area of the large trapezoid is 128 cm^2
