Answer:
x - 3y + 8
Step-by-step explanation:
The perimeter of a triangle is sum of all the three sides.
One side is 5x + y
Another side is 7 + x
Let third side be m
And perimeter is 7x - 2y + 15
We simply sum the 3 sides and equate it to expression of perimeter and find m(third side). Shown below:
5x + y + 7 + x + m = 7x - 2y + 15
6x + y + 7 + m = 7x - 2y + 15
m = 7x - 2y + 15 - 6x - y - 7
m = x - 3y + 8
This is the length of the third side "x - 3y + 8"
3^2 + 10^2 = 109
square root of 109 = 10.4403065089
Answer: 16- width 18- length
Step-by-step explanation:
The larger number is 31 because _ - 15 which gets you to that.
I'll offer you a deal in return for your 5 points: I'll solve it . . . . You check it.
<u>-1/2x - 7 = -11</u>
Add 7 to each side: -1/2 x = -4
Multiply each side by 2 : - x = -8
Multiply each side by -1 : <em> x = 8</em>
Take it Allalala !
