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hammer [34]
3 years ago
9

you buy 75 candy bars at a cost of $0.49 each what is the total cost of 75 candy bars? use mental math

Mathematics
2 answers:
avanturin [10]3 years ago
7 0

It took me a second but its $36.75

svp [43]3 years ago
5 0
The cost= 75 candy bars •$0.49;
75•49/100= ((75•50)-75)/100= ((75•100/2)-75)/100= ((7500/2)-75)/100=
(3750-75)/100= 3675/100= 36.75

Or
75•50cents= 37.5
considering you pay 50 cents instead of 49;
37.5 -0.75= 36.75
Now you took away the extra penny between 50 and 49
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3 years ago
At a farm, there are two huge pits for storing hay. 90 tons of hay is stored in the first pit, 75 tons in the second pit. Then,
Travka [436]

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63 tons

Step-by-step explanation:

The problem statement asks for the tons of hay removed from the first pit. It is convenient to let a variable (x) represent that amount. This is said to be 3 times the amount removed from the second pit, so that amount must be x/3.

The amount remaining in the first pit is 90-x.

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Since the first pit remaining amount is half the second pit remaining amount, we can write the equation ...

... 90 -x = (1/2)(75 -x/3)

... 180 -2x = 75 -x/3 . . . . multiply by 2

... 105 - 2x = -x/3 . . . . . . subtract 75

... 315 -6x = -x . . . . . . . . multiply by 3

... 315 = 5x . . . . . . . . . . . add 6x

... 63 = x . . . . . . . . . . . . . divide by 5

63 tons of hay were taken from the first pit.

_____

<em>Check</em>

After removing 63 tons from the first pit, there are 27 tons remaining. After removing 63/3 = 21 tons from the second pit, there are 54 tons remaining. 27 is half of 54, so the answer checks OK.

6 0
3 years ago
Two less than 6 times the difference of 9 and 5
serious [3.7K]
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4×6-2
24-2
=22

you might want to double check
8 0
3 years ago
Read 2 more answers
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