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Papessa [141]
3 years ago
12

A bag contains 150 marbles. Some are blue, and the rest are white. There are 21 blue marbles for every 4 white marbles. How many

blue marbles are in the bag? Explain your reasoning.
Mathematics
1 answer:
Soloha48 [4]3 years ago
5 0

Answer:

126

Step-by-step explanation:

21 + 4 = 25  (blue plus white marbles)

150/25 = 6 (all the marbles divided by how many we know are white and blue)

21 x 6 = 126  

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Laura plans to paint the 8 foot high rectangular walls of her room, and before she buys paint she needs to know the area of the
hram777 [196]

Answer:

B: 340

Step-by-step explanation:

We are told that her walls are 8 ft high.

Now, Two walls are 10 feet wide. Thus, area of the first two walls will be;

A1 = 2 × (10 × 8) = 160 sq.ft

Also, the other 2 walls are 15 feet wide.

Thus, Area of other two walls will be;

A2 = 2 × (15 × 8) = 240 sq.ft

We are told that the combined area of the 1 window and the 1 door in her room in 60 square feet.

This means that we will subtract 60 Sq.ft from the sum of the area of the 2 walls earlier calculated to get the total area to be painted.

Thus;

Area to be painted = 160 + 240 - 60 = 340 Sq.ft

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3 years ago
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A building contractor is to dig a foundation 45 feet long, 16 feet wide and 6 feet deep. The contractor pays 13 dollars per load
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Answer:

  • 160 yd³ must be hauled
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Step-by-step explanation:

There are 3 feet in a yard, so the volume of the hole is ...

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  = (15 × 16/3 × 2) yd³ = 160 yd³ . . . volume to be hauled

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The cost is $13/(4 yd³), so the total cost will be ...

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3 years ago
2.4x+1.2=6.3 What is X
lidiya [134]

Answer:

Step-by-step explanation:

6 0
3 years ago
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Trent has $500 in his savings account. If he spends $25 each week, how much money will he have left after 8 weeks? Explain
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Answer:

300

Step-by-step explanation:

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Arte-miy333 [17]

Answer: Each ticket cost 3 dollars

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then divide 30 by 10 and you get 3

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