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xaniawashington
03.04.2020 •
Mathematics
A sports store I'd having a sale on soccer balls. A soccer coach purchases 10 soccer balls and 2 soccers bags for $155. Another scorer coach purchases 12 soccer balls and 3 soccer bags for $189. What is the cost of a soccer ball and the cost of a soccer ball ?
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Ответ:
- The price of a soccer ball is $14.5
- The price of a soccer bag is $5
Step-by-step explanation:
To solve this problem, we call:
s = the price of a single soccer ball
b = the price of a soccer bag
We have:
1) A soccer coach purchases 10 soccer balls and 2 soccers bags for $155: so we can write
2) Another scorer coach purchases 12 soccer balls and 3 soccer bags for $189: so we can write
So we have a system of two equations in two unknown variables:
We solve it by multiplying eq.(1) by 3 and eq(2) by 2, and we get:
Now we substract eq(2) from eq(1) and we get:
So
And by using eq(1) we also find the value of b:
So:
- The price of a soccer ball is $14.5
- The price of a soccer bag is $5
Ответ:
5,3
Step-by-step explanation:
rising up from the x-intercept =5 , moving towards your left back to the y-intercept =3