Step-by-step explanation:
If a+b=50
When b=30
a=50-b
a= 50 - 30
a=20
Therefore 20(a)+30(b)=50
Answer:
Scale Factor of 4
Step-by-step explanation:
The original is a 20 *20 square
The new image is a 80*80 suqare
which means that each side is mulitplied by 4 hence the scale factor is 4
Answer:
The elevator will travel 396 feet in 12 seconds.
Step-by-step explanation:
10 secs = 330ft
330/10 = 33
10 * 33 = 330
Hence,
12 * 33 = 396
12 secs = 396 ft
Hope this helps :)
The answer is 21% I hope this helps
Okay, so if your rectangle is 16 by 8, that means that the circle diameter of 8 because that would be outside of the card's width,
the area of the rectangle is 16 x 8 or 128
the radius of the circle would be 4 (because 1/2 of the diameter is radius)
we know that the equation of the circle PIr^2, so the area of the circle is 16PI
then, the remaining area would be calculated by 128-16PI
This comes out to be approximately 77.73
