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2 years ago

15

give an example on an addition problem in which you would and would not group the addends differently to add

1 answer:

Murrr4er [49]2 years ago

3 0

Addends are any of the numbers added together in an equation.

The only time their grouping would matter would be if there were parentheses used to alter the normal Order of Operations.

For ex:
2 - (8 + 3) here, the 8 and 3 have to be grouped together before doing the subtraction.

Any addition problem without parentheses can be used for one where the grouping doesn't matter

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49.50 because you take 35 plus 20 which equals 55, then subtract 10% and you get 49.5 so I then added a zero and got 49.50

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2 years ago

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At a large conference of teachers from a variety of subjects, a random sample of 50 mathematics teachers attending the conferenc

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2 years ago

A solid silver paperweight in the form of a square pyramid is shown below. If silver costs $0.12 per cubic centimeter, how much

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It would cost $232.32, this answer is rounded.

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So its just:

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2 years ago

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points P and Q lie 240 m apart in line with and on opposite sides of a communications tower. the angles of elevation to the top

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Answer:

The height of the tower is 130.5m

Step-by-step explanation:

In the question, we are given the following values:

The angles of elevation to the top of the tower from P = 50°

The angles of elevation to the top of the tower from Q = 45°

The angles of elevation to the top of the tower from P = 50°

Hence,cot P = 1/ tan(50°)

The angles of elevation to the top of the tower from Q = 45°

Hence, tan 45° = 1

In the question,we are told Points P and Q lie 240 m apart in line with and on opposite sides of a communications tower.

Therefore,

PQ = height of the tower( tan Q + 1/tan P)

240m = height of the tower( tan 45° + 1/ tan 50°)

240m = h(1 + 1/tan 50°)

h = (240 m)/(1 + 1/tan (50°))

h = 130.49863962 meters

Therefore, the height of the tower to the nearest tenth of a meter is 130.5 meters(m)

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2 years ago