Answer:
She bought 15 napkins
Step-by-step explanation:
First find the price before coupon
1.5 * n where n is the number of napkins
Then subtract the coupon
1.5n - 20
This is the price she paid before tax
1.5n -20 = 2.5
Solving for n
Add 20 to each side
1.5n -20+20 = 2.5+20
1.5 n= 22.50
Divide each side by 1.5
1.5n/1.5 = 22.5/1.5
n =15
She bought 15 napkins
Answer:
100
Step-by-step explanation:
Multiply 40 by 3 because 40 is 1/3 and find the answer for 3/3.
I got 120, subtract 20 from 120 beacause there is 20 silver cards. The answer is 100
Suppose that executive decides to invest X Dollars on the 8% annual
interest investment. so that means that he would invest the remaining
money on investment with 6% annual interests, which is = (26,000-X)
Total annual return he will get on 8% annual interest investment would be: X/100*8
Total annual return he will get on 6% annual interest investment would be: (26,000-X)*6 /100
We know that total annual return he got was $1,860 which is the sum of annual return of both the investments.
So: X*8/100 + (26,000-X)*6/100 = 1860
We now have a equation with only one variable X and we can find its value by solving this simple equation.
1860= 8X/100 + (26,000-X)*6/100
1860 = 8X/100+ 156000-6X/100
1860 = (8X+ 156000-6X)/100
186000 = 2X + 156000
186000 - 156000 = 2X
30000 = 2X
30000/2 = X
15000 = X
so X= 15000 and Y= 26000-15000 which is 11,000.
Executive invests 15,000 on the 8% annual interest investment and He invests 11,000 on the 6% investment.
Answer: c
Step-by-step explanation:
105 x 4 = 420
63 x 7 = 441
420 + 441 = 861
Let the speed of the plane which flew east is x miles per hour .
And the speed of the plane fles west is twice of the speed of the plane flew east. THerefore speed of plane flew west is 2x miles per hour .
According to question
Dividing both sides by 9
Therefore speed of the plane flew east is 300miles/hour and speed of the plane flew west is 600miles/hour .