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nikdorinn [45]
2 years ago
7

It would take Steve 4 hours to paint a room. If Andre helps him, they can finish painting the room in 3 hours. How long would An

dre take to paint the room by himself?
Mathematics
1 answer:
Lapatulllka [165]2 years ago
6 0

Answer:

12 hours

Step-by-step explanation:

Given data

Steve= 4 hours

Steve and Andrea= 3 hours

Applying the combined work formula

1/A+1/B= 1/T

1/4+1/B= 1/3

solve for B

B+4/4B= 1/3

cross multiply

3(B+4)= 4B

3B+12= 4B

12= 4B-3B

12= B

Hence Andrea will spend 12 hours alone

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The perimeter of a rectangle is 500 feet. The ratio of the base and height is 3:2. What is the measure of the height ?
nika2105 [10]

Answer:

height=100feet

Step-by-step explanation:

perimeter of a rectangle=p=500 feet

p=2a+2b equation 1

a=height

b=base

we have: b/a=3/2

so a=(2*b)/3

in equation 1 we have:

500=2*((2*b)/3)+2*b

so we have

500=(4*b)/3 + 2*b

500=(4b+6b)/3

500=(10b)/3

500*3=10b

b=(500*3)/10

b=150 feet =base

so

a=(2*150)/3=100 feet = height

8 0
3 years ago
Which one is cheapest
Kobotan [32]

Green Sprinkles


Pink Sprinkles is $3.20 per pound

Blue Sprinkles is $4.00 per pound

Green Sprinkles is $2.80 per pound

5 0
3 years ago
A mechanic gave a parts store a deposit of $25 toward the purchase of a part costing $89.95. How much does the mechanic still ow
Hunter-Best [27]

Answer:

25-89.95=64.95

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
please help, I do not know how to do this at all! A restaurant has a large goldfish pond. Suppose that an inlet pipe and a hose
Ne4ueva [31]

Answer:

H = 20.5 hours

I = 19.5 Hours

Step-by-step explanation:

Start by creating a system.

I = time which the inlet pipe takes alone to fill the pond

H = time which the hose takes alone to fill the pond

10/I + 10/H = 10

H - I = 1

H = 20.5 hours

I = 19.5 Hours

8 0
3 years ago
Which ordered pair is a solution of the equation?<br> 7z -5 = 4y -6<br> Choose 1 answer:
ELEN [110]

Step-by-step explanation:

7z-5=4y-6

-4y=-6-7z+5

-4y=-1-7z

y=1/4+7/4z

y=7/4z+1/4

7z=4y-6+5

7z=4y-1

z=4/7y-1/7

3 0
2 years ago
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