Solve system by substitution x-5y=18 2×+6y=4

1 answer:

7 0

Algebra Calculator
I will solve your equations by substitution.12y=4;x−5y=18
Step: Solve 12y=4for y:12y/12=4/12(Divide both sides by 12)y=13Step: Substitute 1/3 for y in x−5y=18:
x−5y=18
x−5(1/3)=18
x+−5/3=18(Simplify both sides of the equation)
x+−5/3+5/3=18+5/3(Add 5/3 to both sides)
x=59/3
Answer:x=59/3 and y=1/3

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The pie chart shows information about voters in an election. 2800 more women vote than men. Work out the total number of voters.

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The picture in the attached figure

let
x--------> men voters
y-------> women voters

we know that
y=x+2800------> y-x=2800------> equation 1

step 1
find the percentage of women and men voters
in the graph
central angle by men voters=130°
central angle by women voters=(360°-130°)-------> 230°
by using proportion
men voters
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women voters
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remember equation 1
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8. A carpenter cut the top section of a window frame with a 37 degree angle on each end. The side pieces each have 50 degree ang

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Answer:

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Joining a top section with a 37 degree end angle to a side piece with a 50 degree end angle will result in the length of the side piece being at an angle of

37 + 50 = 87 degrees to each other.

The same will be true for the other side.

If the sides were parallel, then going up one side, across the top and then down the other side will result in a change of direction of 180 degrees. However, in this frame the direction turns 87 degrees at the first top corner and another 87 degrees at the second top corner. This is a total of

87 + 87 = 174 degrees instead of 180 degrees.

The two sides diverge at an angle of

180 - 174 = 6 degrees from each other as they extend downwards from the top of the frame

Step-by-step explanation:

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