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MathematicsMathematics
12 March, 10:20

Solve the system by substitution. Check your solution.

0.5x+0.25y=36

y+18=16x

a.

(36, 72)

c.

(49, 81)

b.

(9, 126)

d.

(21, 9)

+1
Answers (2)
  1. 12 March, 10:27
    0
    B. (9,126)

    y + 18 = 16x

    =>y=16x-18

    0.5x + 0.25y = 36 (multiply both sides by 4)

    =>2x+y = 144

    Substitute y=16x-8

    =>2x+16x-8=144

    =>18x=152

    =>x=152/18=9

    y=16x-18

    =>y=16 (9) - 18

    =>y=144-18=126

    Answer: x=9 and y=126
  2. 12 March, 10:28
    0
    I believe the answer is b. 9,126
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Home » Mathematics » Solve the system by substitution. Check your solution. 0.5x+0.25y=36 y+18=16x a. (36, 72) c. (49, 81) b. (9, 126) d. (21, 9)
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