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Jet001 [13]
3 years ago
12

Solve the system of equations 2r + 2s = 50 and 2r – s = 17.

Mathematics
2 answers:
Mars2501 [29]3 years ago
8 0
2r +2s = 50
2r - s = 17

Multiply the top by -1
-2r - 2s = -50
2r - s = 17
-3s = -33
s = 11

Then plug 11 in the first equation to get r
2r + 2(11) = 50
2r + 22 = 50
2r = 28
r = 14

so 11 and 14

shutvik [7]3 years ago
3 0
R = 14
s = 11

2(14)+2(11)=50
28+22=50

2(14) - 11 =17
28 - 11 =17
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Answer:

b. 68 + 17h = 357

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Step-by-step explanation:

Charges for coming to my house = $68 (this will be the constant of the equation)

Amount charged per hour labor = $17

hours = h

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The equation that represents this situation can be expressed as:

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68 + 17h - 68 = 357 - 68 (subtraction property of equality)

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\frac{17h}{17} = \frac{289}{17} (division property of equality)

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