Answer:
9x
Step-by-step explanation:
3y +2x-3y +7x
Combine like terms
2x+7x +3y-3y
(2+7)x +(3-3)y
9x +0y
9x
Answer:
1)3
2)77
3)28
4)11
5)7
6)40
7)108
8)7
Step-by-step explanation:
You just have to find what the variable equals.
All these answers are correct
The answer to this question is 8
First let's model the carpet as a rectangle.
The diagonal of a rectangle is given by:
d = root ((L) ^ 2 + (W) ^ 2)
Where,
L = long
W = width.
Clearing the width we have:
d = root ((L) ^ 2 + (W) ^ 2)
d ^ 2 = (L) ^ 2 + (W) ^ 2
(W) ^ 2 = (d) ^ 2- (L) ^ 2
W = root ((d) ^ 2- (L) ^ 2)
Substituting the values
W = root ((root (89)) ^ 2- (8) ^ 2) = 5
answer
The width of the carpet is
5 feet
25. 3y+15
26. 15k+20
27. 21n+7p
28. 60w+20x
Also, you got number 19, number 21, and number 24 wrong.
D+D+D+D+D = 5D, not D⁵
S+S+S = 3S, not S³
N+N+N+N = 4N, not N⁴
Remember, repeated addition, (n+n+n) is 3n. Repeated multiplication, (n•n•n) is n³.
Hope this helps.
