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Andre45 [30]
3 years ago
9

22=a+20 one and two step equations

Mathematics
1 answer:
alex41 [277]3 years ago
4 0

Answer:

a=2

Step-by-step explanation:

you take 20 and subtract it from both sides and then 22-20 is 2 so a equals to 2.

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An engineer needs to determine the distance across a river without swimming to the other side. The engineer notices a tree on th
nasty-shy [4]

Answer:

Step-by-step explanation:

The engineer can use a clinometer to measure the angle of elevation of the top of the tree. Let the height of the tree be represented by x, the she could determine the distance across the river, d, by applying the trigonometric function.

Tan θ = \frac{opposite}{adjacent}

           = \frac{x}{d}

the the distance, d = x ÷ Tan θ

Assume the angle of elevation of the top of the tree is 30^{o}, and the height of the tree is 10 m, then the distance, d, across the river would be;

d = \frac{10}{0.5774}

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d = 17.32 m

The sketch to the explanation is attached to this answer for more clarification.

4 0
3 years ago
Find x on the triangle
iragen [17]

Answer:

(c)

Step-by-step explanation:

Using the cosine ratio in the right triangle

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3 0
3 years ago
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Ksenya-84 [330]

Answer: 36000

Step-by-step explanation:

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6 0
3 years ago
The cities Cleveland, Ohio; Erie, Pennsylvania; and Rochester, New York, in respective order, lie approximately in a straight li
Ann [662]

Answer:

  Erie to Rochester is 145 miles

Step-by-step explanation:

If we designate the points of interest as C, E, and R, we are told that ...

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For CE = 94 and CR = 239, we can fill in the given information and solve for ER.

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  ER = 239 -94 . . . . . . subtract 94 from both sides of the equation

  ER = 145

The distance from Erie to Rochester is 145 miles.

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3 years ago
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23.68421053%

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