Answer:
The commutative property lets you group like terms together:
... 5x +3x +9x +20 +7
Step-by-step explanation:
If we divide the expression into 4 groups:
...[5x] +(20) +(3x +9x) +[7]
according to the commutative property of addition, we can swap the groups in curved parentheses.
... [5x] +(3x +9x) +(20) +[7]
_____
The distributive property lets you combine x terms:
... (5 +3 +9)x +27
... 17x +27 . . . . . . the simplified form of the expression
Answer:
The answer to your question is x = 36, y = 11
Step-by-step explanation:
Data
there are 2 numbers
their sum is 47
one is larger by 25
x is the larger
y is the smaller
Process
1.- Write two equations that help to solve this problem
x + y = 47 Equation l
x = y + 25 Equation ll
2.- Solve the system of equation by substitution. Substitute Equation ll in equation l
(y + 25) + y = 47
-Solve for y
y + 25 + y = 47
2y = 47 - 25
2y = 22
y = 22/2
y = 11
- Find x, substitute y in equation ll
x = 11 + 25
x = 36
2 x 3 = 6
55 + 6 = 61
It's probably a 2-step problem
to multiply and add
There are always two possible unit rates.
Either way, you just divide to find it.
(5 hours) / (216 miles) = 0.023 hours per mile .
(216 miles) / (5 hours) = 43.2 miles per hour .