The exercise is apparently directed toward getting you to group the positive integers together and the negative integers together before you work out the difference. Doing that gives you ...
a) (10 +5) -19
b) = 15 -19
= -4
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Personally, I wouldn't do that <em>for this problem</em>. If you do the arithmetic in order, it seems easier to me because you're only doing single-digit arithmetic after the first sum.
= (10 -19) +5
= -9 +5
= -4
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The idea is that there are different stratgies that you can employ to simplify your work and reduce errors. Grouping positive and negative numbers together is one such strategy. Arranging the sums so they almost cancel is another strategy you can use.
Answer:
n < -13.
Step-by-step explanation:
. n - 16 < -29
Add 16 to both sides of the inequality:
n < -29 + 16
n < -13.
Using the equation y=6x+12, where x is the number of hours and y is the total cost for the given value of x, you can plug in 42 for y and solve:
42=6x+12
42-12=6x
30/6=x
5=x
Thus, Amy can rent the bike for 5 hours.
Answer:
405 yards
Step-by-step explanation:
Given that,
A company made 1,215 yards of copper wire.
They want to wrap the same amount of wire on each three poles.
3 poles = 1,215 yards of copper wire
1 pole = 405 yards of copper wire
So, each pole will require 405 yards of copper wire.
