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8_murik_8 [283]
3 years ago
12

when you add a positive number and a negative number, how can you tell whether the sum will be positive or negative.

Mathematics
1 answer:
masha68 [24]3 years ago
6 0
(+x)+(-y)=+z

x = y = z0

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Answer:

8 one-dollar bills

3 five-dollar bills

2 ten-dollar bills

Step-by-step explanation:

Let x = # of one-dollar bills, y = # of five-dollar bills, and z = # of ten-dollar bills. Total amount in the wallet is $43, so the first equation would be 1x + 5y + 10z = 43. Next, there are 4 times as many one-dollar bills as ten-dollar bills, so x = 4z. There are 13 bills in total, so x + y + z = 13

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A rectangular swimming pool has a width of xyd. The length of the pool
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Answer:

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We have a triangle with sides of length 8.6, 5.8 and 7.5 feet.

Using the Cosine Rule to find the measure of the angle opposite the side of length 8.6 feet:

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