Answer:
<u>The original price of the coat was £ 275</u>
Step-by-step explanation:
1. Let's review all the information given for solving this question:
Sale price of the coat = £ 220
Discount from the original price = 20%
2. Let's find the original price of the coat
Original price of the coat = x
Sale price of the coat = £ 220
Sale price of the coat = x - 20%x
220 = x - 0.2x
220 = x - 2x/10 (0.2 = 2/10)
2,200 = 10x -2x (Multiplying by 10 at both sides)
2,200 = 8x
2.200/8 = 8x/8 (Dividing by 8 at both sides)
275 = x
<u>The original price of the coat was £ 275</u>
Let f(x) be y so you have
y=7x-13
Reverse the signs of x and y so you have
x=7y-13
And then find the value of y
x+13=7y
(x+13)/7=y
And change y to f(x)-1
The greatest common factor?
it would be 9
C.mr Lee spent 7 hours giving drums lessons yesterday. iF each lesson lasted 1/4 hour, how many lessons did he give
Answer:
Step-by-step explanation:
I think the below is your full question:
<em>Mike makes seven dollars an hour working at the grocery store and $10 an hour delivering newspapers. He cannot work more than 20 hours per week. Graph two inequalities that Kishi can use to determine how many hours he needs to work at each job if she wants to earn at least $90 per week.</em>
Here is my answer:
Let x is the number of hours he works at the grocery store
Let y is the number of hours he works at the newspapers
We have two inequalities:
1/ x + y 
<=> y 
20 - x
2/ 7x + 10y 
<=> y 
3/4x + 12.5
Please look at the attached photo
The red line is y 20 - x
The blue line is: y 3/4x + 12.5
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