Answer:
x=4
y=3
Step-by-step explanation:
we have the following equations
3x+y=15 equation 1
5x-4y=8 equation 2
using equation 1 we have:
y=15-3x equation 3
using equation 3 in equation 2 we have:
5x-4(15-3x)=8
5x-4*15+4*3x =8
5x-60+12x = 8
17x=68
x=68/17
so we have x=4
finally in equation 3:
y = 15-3(4)
y = 15-12
y = 3
A. 61.8 inches
B. 31.8 inches
C. 63.6 inches
D. 67.2 inches
Answer:
The answer is 63.6
Step-by-step explanation:
In order to determine the area of the quadrilateral, we have to know the values of its sides. The area of the quadrilateral is:
a= length of the quadrilateral
b=width of the quadrilateral
We know the area and the width of the quadrilateral, so we can determine its length:
Then, the perimeter of the quadrilateral is:
P=2*a+2*b
P=2*15+2*16.8
P=63.6
Finally, the perimeter is 63.6
C. 63.6 inches
That is because to find the length of the quadrilateral do this since you already know the width of the polygon:
252/16.8 = 15
Now that we know the length do this since this is the formula to find the perimeter or for me I would just 2x:
2(16.8) + 2(15) =
33.6 + 30 = 63.6
The perimeter of the quadrilateral is 63.6 inches