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Viktor [21]
3 years ago
14

3/5 of a number is 21 find the number​

Mathematics
1 answer:
DedPeter [7]3 years ago
7 0

Answer:

35

Step-by-step explanation:

To find the original number multiply by the reciprocal of \frac{3}{5} , that is

number = \frac{5}{3} × 21 = \frac{105}{3} = 35

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A swimming pool that holds 1200 gallons of water can be completely drained by a two pumps. The first pump is small and can only
sp2606 [1]

Answer: 45 minutes

Step-by-step explanation:

the first pump takes care of 300 gallons so we need to worry about the remaining 900 gallons. the second pump removes 20 gallons per minute so all u have to do to find how many minutes it would take is divide 900 gallons by 20 gallons a minute which gives you 45

it will take 45 minutes to completely drain the pool

6 0
3 years ago
Distributive 7(5+x)
Misha Larkins [42]

Answer:

35 + 7x

Step-by-step explanation:

Distribute

7x5=35

7x(x)=7x

7x +35

5 0
4 years ago
Choose the correct simplification of the expression (2x − 6)(3x2 − 3x − 6).
seraphim [82]
If you would like to solve (2x - 6) * (3x^2 - 3x - 6), you can do this using the following steps:

(2x - 6) * (3x^2 - 3x - 6<span>) = 2x * 3x^2 - 2x * 3x - 2x * 6 - 6 * 3x^2 + 6 * 3x + 6 * 6 = 6x^3 - 6x^2 - 12x - 18x^2 + 18x + 36 = 6x^3 - 24x^2 + 6x + 36
</span>
The correct result would be <span>6x^3 - 24x^2 + 6x + 36.</span>
3 0
3 years ago
Read 2 more answers
Can I get some help on this? it wants it solved for L​
Lady bird [3.3K]

Multiply both sides by 2pi:

F(2pi) = sqrt(g/l)

Square both sides:

F^2 (2pi)^2 = g/l

Solve for l by dividing both sides by F^2 (2pi)^2

L = g/ F^2 (2pi)^2

Simplify:

L = g / 4pi^2(f^2)

5 0
3 years ago
If f(x) = 3x + 2 and g(x) = x^2 + 1, which expression is equivalent to (f . g)(x)?
makvit [3.9K]

Answer:

d

Step-by-step explanation:

for this function you have to replace the function of g(x) where there's x in the function f(x) that's what the expression f.g(x) means and so this is going to be

3(x²+1)+2

I hope this helps

5 0
3 years ago
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