Answer:
Step-by-step explanation:
A baseball team played 75 games and lost 20% of them. How many games did the team lose?
We can set up an equation to solve this problem, but first we need to write out what we know.
$20 overall
$0.24 every minute
$13.52 remaining on the card
Now that we know our information, we can set it up in an equation.
20 - 0.24x = 13.52
The 20 represents $20 overall when she first got the phone card.
We are then subtracting $20 from how must it costs a minute (which is 24 cents). The 'x' indicates the number we are trying to find (how many minutes her call lasted). Lastly, 13.52 is the result of everything, since she has $13.52 remaining on the card.
We can now solve the equation:
20 - 0.24x = 13.52
-0.24x = 13.52 - 20 /// subtract 20 from each side
-0.24x = -6.48 /// simplify
x = 27 /// divide each side by -0.24
Our solution is: x = 27.
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An easier way to solve this problem would be to first, subtract the total amount of money she had on the card when she first got it, and then the remaining total she ended up with.
$20 - $13.52 = $6.48
So, she spent a total of $6.48 on long distance calls, but since we are looking for how many minutes, we need to divide the total she spent and how much it costs per minute.
6.48 ÷ 24 = 27
We receive the same amount of minutes spent just like we did the last way we solved.
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Salma spent 27 minutes on the phone.
Answer:
-43
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Find the rise over run (gradient) between two points. Choosing x=-2 and x=1 we get (1 - - 2) / (4 - 7) = -3/3 = -1. This means that m in y=mx+c is -1 so it is either A or C. If we then try a pair of x and y with y = -x + c we can get c. Using the first pair: 7=-1*-2+c = 2 + c so c = 5, leaving us with y = -x + 5.
Alternatively try all 4 with the numbers, if plugging in that value of x gives you that value of y then it is the correct equation.
