Answer:
At 8 games, the girls will have the same ammount of money remaining.
Step-by-step explanation:
So we want to know at what time does these equations become the same. We simply write a equality like this:
$15-.75x=$13-.50x
We want to move the x over to the other side of the equation by simply doing this:
-.75x+.50x=13-15 --> Remember that this is a positive .50 because we did the opposite
Simplify
-.25x=-2 --> Remember that two negatives make a positive
x=8
Answer:
7 hours/week
Step-by-step explanation:
A "unit rate" is found by dividing one quantity by the other so that the denominator of the result is 1 (a unit). Often, we want the units of the independent variable in the denominator. Sometimes, we don't know what that is, because it depends on the intended use of the rate.
(14 h)/(2 wk) = 7 h/wk
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When numerator and denominator have the same units, the result is a pure number (one with no units). If that number is a fraction, sometimes it is expressed as a percentage; other times, it is left as a fraction or written as a ratio with a colon, such as 1 : 35.
Here, both units are time, so the "unit rate" could be expressed as a fraction. We know there are 168 hours in a week, so this rate could be ...
(14 hours)/(2·168 hours) = 1/24 . . . . . with no units
When you multiply or divide both sides by a negative in an inequality, flip the sign
I will show 2 ways, 1 with multipy and one with add
1. multiply
divide both sides by -12 and flips sign
r>2
2. add
add 12r to both sides
0<12r-24
add 24 to both sides
24<12r
divide both sides by 12
2<r
r>2
