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Afina-wow [57]
3 years ago
5

4 If 2 sin X = 1 (where X is the measure of an acute angle), then X =

Mathematics
1 answer:
Papessa [141]3 years ago
6 0
X = arcsin (1/2) = 30 degrees
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Find the surface area of a cylinder with a diameter of 18 and a height of 32. Use 3.14 for π. Round your answer to the nearest t
Ksenya-84 [330]

Answer: a = 2,315.5

Step-by-step explanation:

a = 2πrh+2πr²

a = 2π(9)(32) + 2π9²

a = 2π x 288 + 2π x 81

a = 1809.6 + 508.9

a = 2,315.5

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7 0
3 years ago
PLEASE HELP!!
beks73 [17]
<span>Let x = the width
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It says,"The length of a rectangle is 4 less than 3 times the width." write that as:
L = 3x - 4
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If the perimeter is 40, find the dimensions of the rectangle.
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We know: 2L + 2W = 40
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Substitute (3x-4) for L and x for W
2(3x-4) + 2x = 40
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6x - 8 + 2x = 40; Multiplied what's inside the brackets
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6x + 2x = 40 + 8; do some basic algebra to find x; (added 8 to both sides)

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8x = 48
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x = 48/8
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x = 6 which is the width
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It said that L = 3x - 4, therefore:
L = 3(6) - 4
L = 18 - 4
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Check our solutions in the perimeter:
2(14) + 2(6) =
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8 0
3 years ago
Read 2 more answers
25% of what number equals 100
tatiyna

Answer:

its 400

Step-by-step explanation:

4 0
2 years ago
How do I find the slope of a perpendicular line?
Licemer1 [7]
Yes, math can be challenging sometimes (mostly due to the horrible way its taught by teachers but I wont go on a rant about that today).

The Slope of a parallel line is obviously going to have the same slope as the line it is parallel to, which you already know.

But for perpendicular, how would we figure that out?

First, you need to understand whats going on.  Picture a linear line.  Now, look at the (0,0) point.  To make it perpendicular, it must form 90 degrees with the other line.  Now, to get the answer for a perpendicular line, you need to remember two steps.

1.) Change the sign to the opposite sign (negative would go positive and positive would go negative)

2.) You take the reciprocal of the line (That is what times that number would make that number equal one.  2 * 1/2 would be 1.  You can also look at this by switching the denominator and numerator.

If you have more questions, feel friend to add me and write me<span />
4 0
3 years ago
4 pounds of apples cost $1.96. Find the average rate
Over [174]
1.96 divided by 4 = $0.49 per pound of apples
3 0
3 years ago
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