3 years ago

How many integers between 1 and 40 are multiples of 3 and 7

Mathematics

1 answer:

Elis [28]3 years ago

4 0

3 goes in to 40 13 times 7 goes in to 40 5 times but it is not 13+5 because you do not want to count 21 twice

You might be interested in

I don't understand this

Oksanka [162]

Answer:

y=4x+6

Step-by-step explanation:

when x=0 y=6

when x=1 y=10

when x=2 y=14

to find y=50:

50=4x+6

44=4x

11=x

x=11 when y=50

6 0

2 years ago

Solve<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%20%5Ctimes%202%282%20%5Ctimes%204%29%7D%7B8%7D%20" id="TexFormula1" ti

creativ13 [48]

The answer is three you have to times the top numbers and divide

8 0

2 years ago

Read 2 more answers

Solve -5 square root x =15

Nezavi [6.7K]

Answer:

x = 9.

Step-by-step explanation:

-5 square root x =15

divide both sides by -5:

√x = 15/-5 = -3

Squaring both sides:

x = 9.

3 0

4 years ago

Write 1-2log7x as a single logarithm

slavikrds [6]

Answer:

$log_{7} \frac{7}{x^{2} }$

Step-by-step explanation:

We need to write $1 - 2log_{7}x$ as a single logarithm.

We know that

$log_{7}7 = 1$

Therefore we have:

$log_{7}7 - 2log_{7}x$

→ $log_{7}7 - log_{7}x^{2}$

→ $log_{7} \frac{7}{x^{2} }$

The solution is: $log_{7} \frac{7}{x^{2} }$

4 0

4 years ago

Suppose 15% of $x$ equals 20% of $y$. What percentage of $x$ is $y$ ?

viktelen [127]

Answer:

Step-by-step explanation:

4 0

3 years ago