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liberstina [14]
3 years ago
7

Which is a factor of 21? 4 3 6 5

Mathematics
2 answers:
arsen [322]3 years ago
3 0

Answer:

3

Step-by-step explanation:

Using listing:

1 \times 21 = 21

3 \times 7 = 21

No other factors are possible.

Hence, 1, 3, 7 and 21 are factors of 21.

Nadusha1986 [10]3 years ago
3 0

Answer: 3

Step-by-step explanation:

3 is the only number you can multiply to get 21. Example 3x7=21

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A school janitor has mopped 1/3 of the classroom in five minutes at what rate is he mopping
Ratling [72]

Answer:

1/15 per min

Step-by-step explanation:

3 times 5 equals 15

Put the 15 on the bottom of the fraction and then put the 1 on top of the fraction, there you go.

4 0
3 years ago
One number is 6 more than twice another. If their sum is 51, find the numbers.
joja [24]

Answer:

y=2x+6 ; x+y=51

Step-by-step explanation:

assuming x is one number and y is the other -

one number (y) is 6 more (+6) than twice another (2x) -

using that knowledge we form an equation -

y=2x+6

the sum (x+y) is 51

using this knowledge we can make the equation -

x+y=51

now you have -

y=2x+6 or 2x-y=-6

x+y=51

using system of equations -

you add the equations -

3x=45

x=15

y=51-x => y=36

hope this helps!!

7 0
3 years ago
All of the following expressions have the same value, when x = -2 and y = 4, except _____.
irinina [24]

Answer:

C

Step-by-step explanation:

When plugged in it is -4(-2)² which equals -16 while the others equal 16

4 0
4 years ago
Read 2 more answers
What is the solution to -x2 + 5x - 10 = 0?
Korolek [52]

Answer:

No solution

Explanation

−x^2+5x−10=0

Step 1: Use quadratic formula with a=-1, b=5, c=-10.

you plug it in as shown below

and simplify

when you simplify

you get

as shown below

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7 0
3 years ago
64N-6-4-26-2-4-6Write the domain as an inequality
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According to the given graph, we can note the following:

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