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3 years ago

Luis bought a box of 84 nails.He used 3/4 the nails in the box.How many nails did he use?

1 answer:

Taya2010 [7]3 years ago

6 0

Answer: 63

Step By Step: Put 84 over a 1 to make this easier. One in the format, multiply 84/1 by 3/4. You should get 252/4. One you simply this you should get 63.

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The square of Mark's age 3 years ago is 6 times the age he will be in 9 years. What is his age now?

Lubov Fominskaja [6]

Answer:

Age= 15

Step-by-step explanation:

Let a be for age at the moment

(a-3)^2 =6(a+9)

a^2-6a+9=6a+54

a^2-12a-45

(a-15)(a+3)

a=15 or a=-3

Age cannot be negative (-)

Therefore

Age =15

3 0

3 years ago

Read 2 more answers

There is 75 gallons of water into the pool every hour if the pool can hold 6,750 gallons how long will it take to fill the pool?

Andreyy89

Answer:

90 hours

Step-by-step explanation:

The rate at which water enters the pool is

75 gallons

-------------------

1 hour

This is equivalent to

1 hour per 75 gallons, leading to:

1 hour

-------------------- * 6,750 gallons = 90 hours

75 gallons

3 0

3 years ago

Mrs. Rivera has bars of chocolate in a box. The total mass of bars of chocolate in the box is 3 kilograms. What is the mass in g

sergeinik [125]

Answer:The chocolate in the box is 3000 grams.

Every Kilogram has 1000 grams

You multiply 1000×3=3000

6 0

3 years ago

You ran 800 meters in 5 minutes what your average speed

larisa [96]

Answer:

160 metres per minute

Step-by-step explanation:

800 / 5 = 160

6 0

3 years ago

Read 2 more answers

In order to remove water from a flooded basement, two pumps, each rated at 40 gallons per minute, are used. After half an hour,

Scrat [10]

Answer:

3600 gallons of water was removed from the basement.

Step-by-step explanation:

Given:

Rate of each pump = 40 gallons/min

We need to find find the number of gallons of water removed from the basement.

Solution:

Now Given:

After half an hour, the one pump burns out.

Now we know that;

1 hour = 60 mins

$\frac12$ hour = $\frac{60}{2}=30\ mins$

Now for 30 mins both the pumps were working and removing the water.

So we can say that;

Water remove for first 30 mins = $40\times2\times30=2400\ gallons$

Also Given:

the second pump finishes removing the water half an hour later.

So we can say that;

Water removed for next 30 mins = $40\times 30\times1 =1200\ gallons$

Now we can say that;

Total water removed from the basement is equal to sum of Water remove for first 30 mins and Water removed for next 30 mins .

framing in equation form we get;

Total water removed from the basement = $2400+1200=3600\ gallons.$

Hence 3600 gallons of water was removed from the basement.

6 0

3 years ago