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NeX [460]
2 years ago
6

A support beam needs to be placed at a 28° angle of elevation so that the top meets a vertical beam 1. 6 meters above the horizo

ntal floor. The vertical beam meets the floor at a 90° angle. Law of sines: StartFraction sine (uppercase A) Over a EndFraction = StartFraction sine (uppercase B) Over b EndFraction = StartFraction sine (uppercase C) Over c EndFraction Approximately how far from the vertical beam should the lower end of the support beam be placed along the horizontal floor? 3. 0 meters 3. 4 meters 3. 9 meters 4. 4 meters.
Mathematics
1 answer:
vlada-n [284]2 years ago
7 0

Answer:

3.0m

Step-by-step explanation:

Place the support beam so the top meets the vertical beam 1.6ms above. You’re gonna need the distance of 3 meters from the support beam.

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BASEBALL The formula for a pitcher's earned run average, or ERA, is a = 9r/p. In
trasher [3.6K]

Answer:

To find a baseball pitcher's earned run average you can use the formula EI 9r

To find a baseball pitcher's earned run average (ERA), you can use the formula Ei=9r, where E represents ERA, i represents number of innings pitched, and r represents number of earned runs allowed.

Step-by-step explanation:

5 0
3 years ago
Plz help idk what this is even about
AysviL [449]

I think the answer is A.

It's probably wanting you to use pythagorean theorem.

6 0
3 years ago
Carry out the following division.​
kifflom [539]

Answer:

1: 8a²

2: 9a²b²c²

Step-by-step explanation:

1: 48a³ ÷ 6a

48÷6 = 8

8a²

2: 72a³b⁴c⁵ ÷ 8ab²c³

72÷ 8 =9

9a²b²c²

4 0
2 years ago
Read 2 more answers
Write the sum using summation notation, assuming the suggested pattern continues. -9 - 4 + 1 + 6 + ... + 66
Ipatiy [6.2K]

Answer:

Summation notation is:

\sum_{n=1}^{16}[5(x-1)-9]

If you prefer it a little more simplified:

\sum_{n=1}^{16}(5x-14)

Step-by-step explanation:

First my favorite part, finding a pattern between the consecutive terms.

This is an arithmetic series because the terms are going up by 5 each time.

So arithmetic sequence, think linear equations:

x     |      y

1            -9

2           -4

3             1

4             6

..................

n             66

We are going to have to find that n but will will eventually...

The equation for a line in point slope form is y-y_1=m(x_x_1) where (x_1,y_1) is a point on the line and m is the slope.

We are already have the slope is 5 (the slope is the common difference in arithmetic sequence).

I'm going to use the first point (1,-9).

So the equation in point slope form is y-(-9)=5(x-1)

Subtract 9 on both sides:

y=5(x-1)-9

Now we need to know how many terms we are adding so what is x if y=66.

66=5(x-1)-9

Add 9 on both sides:

75=5(x-1)

Divide both sides by 5:

15=x-1

Add 1 on both sides:

16=x

We have 16 terms in this sequence where the 16th term is 66.

Summation notation is:

\sum_{n=1}^{16}[5(x-1)-9]

You could simplify the 5(x-1)-9.

Distribute:  5x-5-9

Add like terms:  5x-14

3 0
2 years ago
Read 2 more answers
The area of a pentagon increased by 27 is the same as four times the area of the pentagon, minus 15. what is the area of the pen
Basile [38]
Set up an algebraic equation. This is what it looks like based on what the question tells you:

Let a = area of pentagon
a+27 = 4a-15
3a-15 = 27
3a = 42
a = 14
6 0
3 years ago
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