3 years ago

The difference of 3 times a number and 18 is 39. what is the number?

Mathematics

2 answers:

Setler79 [48]3 years ago

5 0

The number is 7(Seven).

Ber [7]3 years ago

4 0

Just set up an equation, with "x" being the unknown number.
3x-18=39
3x=57
x=19.
The unknown number is 19.

You might be interested in

Charles bought 7/8 foot of electrical wire and 5/6 foot of copper wire for his science project .What is the least common denomin

coldgirl [10]

Answer:

The least common denominator of the fractions is 24

Step-by-step explanation:

we know that

The least common denominator (LCD) is the smallest number that can be a common denominator for a set of fractions

we have

7/8

Multiples of 8 -------> 8,16,24,32,...

5/6

Multiples of 6 -------> 6,12,18,24,...

24 is a common multiple of 6 and 8. It is their lowest common multiple

Alternative Method

we have

$8=2^{3}$

$6=2*3$

The least common multiple are those common and non-common numbers with the greatest exponent

$lcm= 2^{3}*3=24$

6 0

3 years ago

If one quarter (25 cents) is 25% of a dollar, what percent is 23 cents?

Ugo [173]

You need to apply the same reasoning.
25 cents is 25% of a dollar because they are 25 out of 100, that is 25/100 = 25%
For 23 cents is exactly the same reasoning:
23 cents is 23% of a dollar because they are 23 out of 100 cents, that is 23/100 = 23%

5 0

3 years ago

Can u please help me please. Please

jonny [76]

The answer is
C = 4 ÷ 1/5

6 0

3 years ago

In how many ways you can put 2 books on 5 shelves so that

Lostsunrise [7]

Answer:

Step-by-step explanation:

rfgg

3 0

3 years ago

Read 2 more answers

Five more than the sum of s number and 10 in algebraic expression

True [87]

That would be written 5s+10

7 0

3 years ago