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vlada-n [284]
4 years ago
5

3(x+2y)=7y-9 when y=3

Mathematics
2 answers:
8_murik_8 [283]4 years ago
8 0
I'll do it step by step:

3(x+2(3))=7(3)-9
3(x+6)=21-9
3x+18=12

I don't know what x is, so I think that's as much as I can do. 
ANTONII [103]4 years ago
8 0
First substitute all of the y's with the value of y, like so:
3{x+(2*3)} = 7*3-9
Solve for x.
3{x+(6)} = 21-9
3(x+6)=12
x+6=4
x=(-2)
Hope this helps, please mark brainliest, I am one away from my next rank, and have an amazing day.
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3(x+2y)+5x−y+1 simplify
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3x+6y+5x-y+1
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7 0
4 years ago
Given the pay rate and hours worked, determine the gross earnings, Federal taxes (assuming 18% of gross earnings), state taxes (
ella [17]

Answer:

Let us assume that the pay rate per hour = x

no. of hours worked = n

Gross earnings = x*n

Federal taxes = 18% of gross earnings

= 0.18(x*n)

State taxes = 4% of gross earnings

= 0.04(x*n)

Social security deduction = 7.05% of gross earnings

= 0.0705(x*n)

Total deductions = Federal taxes + State taxes +SSD

= 0.18(x*n) + 0.04(x*n) + 0.0705(x*n)

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Net pay = Gross earnings - Total Deduction

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3 0
3 years ago
Find the surface area of regular prism with height 6 cm, if the base of the prism is a Regular quadrilateral with side 4 cm.
marshall27 [118]
A "regular quadrilateral" is a square, so the length and width are both 4 cm. The surface area of a rectangular prism is given by
  S = 2(LW +H(L +W))
  S = 2((4 cm)*(4 cm) +(6 cm)*(4 cm +4 cm))
  S = 2(16 cm² +48 cm²)
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The surface area of the prism is 128 cm².


6 0
3 years ago
Does anyone know how to do this i need help please?
iVinArrow [24]

Answer:

Step-by-step explanation:

Do the x-axis then the y-axes thats all i know sorry if i could not help that much

4 0
3 years ago
Find the common ratio: 4, -16, 64, -256, ...​
guajiro [1.7K]

Answer:

you multiply by -4 each time.

Step-by-step explanation:

4 x -4= -16

-16 x -4 = 64

64 x -4 = -256

hope this helps

7 0
3 years ago
Read 2 more answers
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