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inysia [295]
3 years ago
13

Steve is a painter. He can paint a house in 20 hours. It takes his assistant 30 hours to paint a house. How long, in hours, woul

d it take them to paint a house working together?
Mathematics
2 answers:
padilas [110]3 years ago
8 0
I think the answer is  15 Hours<span />
vitfil [10]3 years ago
4 0

The correct answer is D. 12.


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Without using trignometery tables find value of , cos70/sin20+cos57.cosec33 - 2cos60
Helen [10]
Here  is some thoughts on this:

cos 57  = sin (90-57) = sin 33 

so cos 57 . cosec 33 = cos 57 / sin 33 = sin 33 / sin33 = 1

2 cos 60 = 2 * 1/2  = 1

so the last 2 parts work out to 0 

now we have to find cos 70 / sin 20

sin 20 = cos 70  so this comes to 1


so finally the answer is 1
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3 years ago
In a group of 140 adults, 92 watch tennis, 81 play a sport and 40 do neither. Find the probability that an adult chosen at rando
likoan [24]

Answer:

PROBABILITY =11/140 or 8% (approx.)

8 0
2 years ago
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I am a odd number less than 100 and a multiple of 15.The sum of my digits is 12.What number am I.
lutik1710 [3]
The number is 75
15*3=75
75<100
7+5=12
75 is odd
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3 years ago
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The linear equation y = 3x + 2 has slope 3 and y-intercept
Nookie1986 [14]

Answer:

Y intercept is 2

Step-by-step explanation:

m is slope and b is y intercept

3 0
3 years ago
Solve for x<br> Y= x-v/b
andrey2020 [161]

Answer:

x=y+v/b

Step-by-step explanation:

So first you have y=x-v/b. You want to isolate x, so subtract x from both sides. You'll get -x+y=-v/b. Next, you're going to want to subtract y to further isolate x now that it's on the left side. Now you'll have -x=-y-v/b. But you don't want x to be negative, so you can divide both sides by -1 to make x positive. Now you'll have x=y+v/b.

6 0
3 years ago
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