<span>Let the wall's length be y. So the fence parallel is also y.
We form the equation;
2x + y = 240
Now the area A is x*y, which is given as 5500.
We have 2 equations with 2 variables. Solve them and get the answer.
xy = 5500
2x + y = 240
Y = 5500/x
2x + (5500/x) = 240
2x^2 - 240x + 5500 = 0
x^2 - 120x + 2750 = 0
Work out the value(s) of x from above. </span>
First, let's multiply the first equation by two. This is because we have to eliminate either x or y by subtraction or addition so that means either both of the x's or both of the y's in the two equations have to be equal. Thus multiplying the first equation by 2 will give 12x+8y=4.
Next, subtract equation two from equation one:
We get a third equation, 2x-0= -28
Thus, x=-28/2. x= -14
In the same way, to find y, we need to eliminate the x's in both equations. This can be done by multiplying the first equation by 5 and the second by 3
Thus : 30x+20y=10 and 30x-24y=96
Subtracting the second equation from the first, we have 0+44y=-86
y=-86/44
y = 1.96 or 43/22
Answer:
He would make $67.20 more a week if he got the increase.
Step-by-step explanation:
10% of $16.80 is $1.68. Add $1.68 to $16.80. You get $18.48. Multiply that by 40 hours. You get $739.20. Next, subtract $672 from $739.20. Your answer to that is how much more he'll make if he gets the increase.
The proportional graph that corresponds to the situation is: Graph C.
<h3>What is a Proportional Graph?</h3>
A proportional graph is a straight line graph with a constant of proportionality, k = y/x. The equation of the graph is defined as, y = kx.
The equation, M = 3n, has a constant of proportionality as, k = 3.
In graph C, using a point on the line, (400, 1,200), the constant of proportionality, k = 1,200/400
k = 3.
Therefore, the answer is: C.
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