Ruth bought cutter s and screwdrivers to upgrade the computers in her company. A cutter costs 15.2$ and a screw driver costs $2.
She bought a total of 29 tools and spent 150.40$. how many of each tool did ruth buy?
1 answer:
Answer:
The number of cutters is 7
The number of screw drivers is 22
Step-by-step explanation:
Let
x-----> the number of cutters
y----> the number of screw drivers
we know that
x+y=29 ----> equation A
15.2x+2y=150.40 ----> equation B
Solve the system of equations by graphing
Remember that the solution of the system of equations is the intersection point both graphs
The solution is the point (7,22)
see the attached figure
therefore
The number of cutters is 7
The number of screw drivers is 22
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Answer:
Step-by-step explanation:
Hello,
Touchdown is 7 points, field goals is 3 points
Let's note a the number of touchdowns and b the number of field goals, we can write
(1) a + b = 80
(2) 7a + 3b = 516
(2) - 3*(1) gives
7a + 3b - 3(a + b) = 516 - 3*80
<=> 7a + 3b -3a - 3b = 516 - 240 = 276
<=> 4a = 276
<=>
And then from (1) b = 80 - 69 = 11
Hope this helps