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ra1l [238]
3 years ago
15

At what point will the lines 38 = 2x - 2y and -5x + 87 = -4y intersect on a graph?

Mathematics
1 answer:
Anna71 [15]3 years ago
4 0

zhshsjrheue ejeiehsidhsiehswhsjsbjs

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If sinx=5/13 and x is in quadrant 1, then sin x/2=
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Sin^-1(5/13) = 22.6

sin(22.6/2) = 0.196
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3 years ago
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20000000000×3-100000​
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Answer:

59999900000

Step-by-step explanation:

20000000000 × 3 = 60000000000

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How can exponents help you find the area of a rectangle if each side length is multiplied by x?
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Exponents can make the problem smaller and look less confusing. If you see a problem with  5*5*5*5*5*5*5*5 then you're going to eventually loose count and will have to keep repeating. But if you put 5 to the 8th power then you know right away just to multiply 5, (8) times, 
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3 years ago
An observer stands 25 feet from the base of a flagpole and watches a flag being lowered at a rate of 5 ft/sec. Determine the rat
Sedaia [141]

Answer:

0.1 rad/s

Step-by-step explanation:

Since the distance from or to the flagpole is not given, I will assume. And my assumption is 50 ft

Now, the elevation angle A = 45 degrees, converting to radians, we have π/4 radians

Remember that the tan of an angle is OPP/HYP, and so

tan A = h/25, on differentiating, we have

d tan A/dA = sec^2 A = (1/25) dh/dA

Next, we have

25 sec^2 A * dA/dt= dh/dt = 5

Making dA/dt the subject of formula, we have

dA/dt = (1/5) cos^2 A

but cos^2 A from trigonometry = 1/2, this means that

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If you want to convert to degrees, your have

.1 Rad/s( 180 deg/rad) = 18 degrees/second

3 0
3 years ago
The density of ethanol is around 0.8g/mL. What is the mass of 20mL of ethanol?
Harman [31]

Answer: 0.7893g//mL

If 20 mL of ethanol (density =0.7893g//mL) is mixed with 40mL water (density = 0.9971g//mL)

Step-by-step explanation:

4 0
3 years ago
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