MATHEMATICS HIGH SCHOOL

An observation tower is 75m high. A support wire is attached to the tower 20m the top. If the support wire and the ground form an angle of 46 degrees, what is the length of the support wire, to the nearest tenth?

Answers

Answer 1

Answer:

Answer:

76.46m

Step-by-step explanation:

Using what we know we can solve for the length of the support wire using Pythagoras.

Height of tower = 75m

Support wire 20 m from top

Angle formed (α) = 46°

Using Pythagoras :

Sinα = opposite / hypotenus

Height used = height of tower - 20 m from top

Height = opposite = (75 - 20)m = 55m

Hypotenus = Length of support wire

Sin 46 = 55m / hypotenus

Hypotenus * sin 46 = 55

0.71934 * hypotenus = 55

Hypotenus = 55/0.71934

Hypotenus = 76.458976

Hence, Lenght of support wire = 76.46 m

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—. And.

18:

Which of the b-values satisfy the following inequality?

5

Answers

Answer:

Step-by-step explanation:

85% of what number equals 17

Answers

percent means parts out of 100
85%=85/100=0.85
'of' means multiply

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What is the equation of the line, in general form, that passes through the point (1, 1) and has a y-intercept of 2. possible answers: x - y + 2 = 0
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x - y - 2 = 0

Answers

To solve this problem we need to know the form of the general equation of the line. That is, y= mx+b where m is the slope and b is the intercept. We are already given the y-intercept (2) our next step is to fin the slope. Substitute the point give (1,1) in the equation y= mx+2 and then solve for m. The slope is then -6. The final equation is y = -x+2 or x + y - 2 = 0

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