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stepan [7]
3 years ago
15

NEED HELP ASAP! 30 POINTS

Mathematics
1 answer:
MrRissso [65]3 years ago
3 0
Use a calculator survivorguy00
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Alex is creating an outdoor structure out of two 12 foot boards. The boards must have an angle of elevation
Whitepunk [10]

Answer:

5.0 ft - 5.6 ft

Step-by-step explanation:

Given that the structure is to be made using two 12 foot boards, then we expect the total perimeter to be equal to (2*12)= 24 ft.

Using the angle of elevation, 40° and the width of 8 ft then you can apply the formula for tangent of a triangle where ;

Tan α = opposite side length/adjacent length

Tan 40°= h/8

h= 8 tan 40° = 6.71 ft

Applying the cosine of an angle formula to find the length of the sliding side

Cosine β = adjacent length /hypotenuse

Cosine 40°= 8/ sliding side length

sliding side length = 8/cosine 40° =10.44 ft

Checking  the perimeter = 10.44 +8+6.71= 25.15 ft

This is more than the total lengths of the boards, so you need to adjust the height as;

24 - 18.44 = 5.56 ft ,thus the height should be less or equal to 5.56 ft

h≤ 5.6 ft

6 0
3 years ago
Simplify 38 over 49 what’s the anwswer
Katyanochek1 [597]

Answer: 38 over 49 can be written as 38/49. When divided, you will get 0.77551020408. It takes lots of regrouping, but it ends eventually.

If you are reducing it as a fraction, it is not possible because there is no other number to reduce it, so it will be in it's simplest form already.

8 0
3 years ago
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Briana has just finished her sixth grade scrapbook. In her scrapbook ,47% of the pages include her twin sister,Bethany. The scra
Pani-rosa [81]
 you do 47%/100% and X/896 and cross multiply . so 47 times 896 =  42112 and divide that by hundred so the answer should be 421 photos. 
3 0
3 years ago
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Which expression represents, six times a number plus 8 times a number?
Goryan [66]
B  is the answer 6a + 8b
6 0
4 years ago
What is the solution 4x+6<18
mash [69]

Answer:

x < 3

Step-by-step explanation:

4x +6 < 18

add and subtract 6 from both sides

4x + 6 - 6 < 18 -6

4x < 12

x< 12/4

X < 3

4 0
3 years ago
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