Answer:
-11
Step-by-step explanation:
Get like terms on the same side
18y - 14y = -21 -23
Do the math
4y = -44
Divide both sides by 4
y = -11
To condition in which we can justify if the forces are pulling at right angles to each other is that the sum of the squares of the two lesser number should be equal to the square of the third number.
For the first set: 12 lb, 13lb, 19lb.
12^2 + 13^2 <span>≠ 19^2
For the second set: 15 lb, 36 lb, 39 lb
15^2 + 36^2 = 39^2
The first pair of forces do not pull at a right angle while the second do.
Thus, the answer is letter B. </span>
Answer:
The first step would be canceling out the eight getting you 4x = 28 and the solution would be x = 7
Step-by-step explanation:
To simplify you need to add the eight to itself to cancel it out but you have to do it to the 20 too making it 28. Then you have to divide 28 by 4 getting you 7.
