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Anna11 [10]
3 years ago
11

John can clear a lot in 1.5 hours. His partner can do the same job in 4.5 hours. How long will it take them to clear the lot wor

king together?
Mathematics
1 answer:
Crank3 years ago
4 0

Answer:

1 hour and 7.5 minutes

Step-by-step explanation:

We have the following information:

Jose makes 1 / 1.5 of the job per hour. It is his rate of work in addition to that the partner makes 1 / 4.5 of the job per hour. It is his rate of work.

Thus:

1 / 1.5 + 1 / 4.5 = 1 / x

0.8898 = 1 / x

x = 1 / 0.8888

x = 1.125

Hence, it will take 1 hour and 7.5 minutes for them to complete the job working together.

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Find the measure of the missing angle using the triangle angle sum theorm.
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Answer:

20 degrees

Step-by-step explanation:

One angle is 70 degrees and the other is 90. Angles of a triangle add up to 180. 180 - 70 - 90 = 20. The final angle is 20 degrees.

4 0
3 years ago
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Jan and Kim own numbers of marbles
nikdorinn [45]

Answer:

5:6 + 7:8 = 12:14

Jan will have 12 marbles

Kim will have 14 marbles

4 0
3 years ago
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The volume of this CONE is 175π cubic units.
yulyashka [42]

Answer:

1649.33 units³

Step-by-step explanation:

Let the height and the radius be known as "h" and "r" respectively.

<u>Formulae(s):</u>

  • Volume of cylinder: πr²h
  • Volume of cone: πr²h/3

Clearly, we can see that the volume of the cylinder is three times greater than the volume of the cone as,

  • ⇒ πr²h = 3(πr²h/3)
  • ⇒ πr²h = πr²h (True)

<u>Determining the volume of the cylinder;</u>

  • ⇒ Volume of cylinder = Volume of cone × 3
  • ⇒ Volume of cylinder = 175π × 3
  • ⇒ Volume of cylinder = 525π
  • ⇒ Volume of cylinder = 1649.33 units³   (2 d.p)

Therefore, the volume of the cylinder is 1649.33 units³.

6 0
2 years ago
Find sin angle∠ A. <br> A. 3/5<br> B. 4/5<br> C. 1<br> D. 5/4
Rzqust [24]

Answer:

The answer is B.

Step-by-step explanation:

Recall SohCahToa, where sin(A)=opp/hyp.

The opposite side (to angle A) here is 8, while the hypotenuse is 10.

Thus, we have:

sin(A)=8/10=4/5

The correct answer is B.

8 0
3 years ago
You have been asked to analyze the popcorn recipes of three different local theatres in order to figure out which theatre has th
svlad2 [7]

Answer:    The ratio value of oil to popcorn kernels for theatre C is 6 / 32 = 3 / 16.

Step-by-step explanation: Given that the manager of Theatre A says that they usually go through about 15 cups of popcorn kernels and about 5 cups of oil each weeknight.

Then, the ratio value of oil to popcorn kernels for theatre A is 5 / 15 = 1 / 5.

Given that the manager of Theatre B says that they order 18 cups of oil and 72 cups of popcorn kernels each week.

Then, the ratio value of oil to popcorn kernels for theatre B is 18 / 72 = 1 / 4.

Given that the manager of Theatre C says that their concessions use 6 cups of oil and 32 cups of popcorn kernels on a busy Saturday.

Then, the ratio value of oil to popcorn kernels for theatre C is 6 / 32 = 3 / 16.

3 0
2 years ago
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