7(2а - 3) - 5a = -3
please show the work
1 answer:
Answer:
a = 2
Step-by-step explanation:
14a - 21 - 5a = -3
9a - 21 = -3
9a = -3 + 21
9a = 18
a = 2
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Answer:
x = $20/day, y = $0.35/mile
Step-by-step explanation:
x = $/day, y = $/mile
4x + 160y = 136
1x + 240y = 104
You can solve by elimination or substitution.
For example:(4/9) x=8 Now can solve this equation multiplying each side by 9/4. (9/4)(4/9)x=(9/4)8 x=18 To check: (4/9)(18)=(4*18)/9=72/9=8
Slope would be 1/3 so do rise over run from your point
Length= 2*width area=l*w=2*width*width=2*width^2 area+160=(2*width+1)*(width+1) A+160=2w^2+2w+w+1 A+160=2w^2+3w+1 putting value of a 2w^2+160=2w^2+3w+1 160=3w+1 w=53m l=106m