Aidan, please use more parentheses so that there's no question about what's being divided by what.
I am unsure whether the final " /a " indicates division of (b+3) by a or division of the entire expression before " /a " by a.
Here is the way I'm going to interpret your math problem:
b 2(b+3)
a+5 - ------ + ---------
b-4 a
Subbing 2 for a and 3 for b, we get
3 2(3+3)
2 + 5 - --------- + -------------
3-4 2
12
This comes out to 7 + 3 + ------ = 10+6 = 16
2
Answer:
Average rate of change is -1.25
Step-by-step explanation:
The value is 62.50
To the get whole value or 100 % of the value, we always divide the value to its corresponding percentage.
25 is the value; 40% is the percentage of 25 from the whole value.
25 / 40% = 62.50
In the event that the value of a part and the whole is given and the percentage is required. Simply divide the part by the whole to get its percentage of the whole.
whole = 62.50
part = 25
25 / 62.50 = 0.40 * 100% = 40%
If the whole value and the percentage is given. To find the value of the percentage, simply multiply the whole to the percentage.
whole = 62.50
percentage = 40%
62.50 * 40% = 25
Answer:
a. 100 mph
b. 500 mph
Step-by-step explanation:
a.
Let the speed of Lindbergh's plane be x.
Today's planes are 5 times faster, so their speed is 5x.
Today's planes speed is 400 mph faster than Lindbergh's speed.
x + 400 = 5x
5x = x + 400
4x = 400
x = 100
Lindbergh's speed was 100 mph
b. 5x = 5 * 100 = 500
Today's planes fly at 500 mph
