Answer:
x(7 - x)
Step-by-step explanation:
Given
7x - x² ← factor out x from both terms
= x(7 - x) ← in factored form
Answer:
every 1/4 inch on the map is 1 mile.
You need to find the number of 1/4 inches there are in 3 1/2 inches.
There are four 1/4 inches per inch.
3 x 4 = 12
There are two 1/4 inches in 1/2 inch.
12+2 = 14
The cities are 14 miles apart.
Answer:
11 = Y+5
Step-by-step explanation:
Answer:
Amount invested at 8% is $9000 and amount invested at 18% is $21000.
Step-by-step explanation:
Let amount invested at 8% be x.
Let amount invested at 18% be y.
We get the 1st equation as:
........(1)
We get the second equation as:

=> 
or getting rid of the decimal by multiplying by 100 on both sides.
........(2)
Multiplying (1) by 8 and subtracting from (2) we get
So, y = 21000
And 

So, x = 9000
Therefore, amount invested at 8% is $9000 and amount invested at 18% is $21000.