Rewrite the expression 14m - (5+8m) without parentheses
2 answers:
Answer:
Step-by-step explanation:
The question above is answered below.
Rewriting the expression above without parentheses is done by simply removing the parentheses using the negative sign. Note that the signs of the constant (5) and term (8m) in the expression are positive (+). Thus, using the negative sign to remove the parentheses will be done using the arithmetic signs rule: - × + = -, that is, minus times plus equals minus; such that - × +5 = -5 and - × +8m = -8m. Therefore,
In case the expression is to be evaluated, the result will be:
14m - 5 - 8m
Rearrange the terms
14m - 8m - 5
6m - 5
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Answer:
4:1 (I think)
Step-by-step explanation:
Let's write some equations first:
For both prices increasing by 20:
then we can use cross multiplication
2x+40=5y+100
For both prices decreasing by 5:
same here:
5y-25=x-5
Using substitution for 5y, we get: 5y=x+20
2x+40=5y+100
2x+40=x+20+100
x=80
plugging this in to the second equation:
5y-25=x-5
5y-25=80-5
5y-25=75
5y=100
y=20
therefore we get x:y=80:20
4:1