Ask question

Ask question

All categories

3 years ago

12

Find the lcm of 7,18,21

1 answer:

Sholpan [36]3 years ago

6 0

Answer:

LCM (7, 18 and 21) = 126

Step-by-step explanation:

Step 1: Address input parameters & values

Intergers: 7 18 21

LCM (7, 18, 21) = ?

Step 2: Arrange the group of numbers in the horizontal form with space or comma separated format

7, 18 and 21

Step 3: Choose the divisor which divides each or most of the integers of in the group (7, 18 and 21), divide each integers separately and write down the quotient in the next line right under the respective integers. Bring down the integer to the next line if the integer is not divisible by the divisor. Repeat the same process until all the integers are brought to 1.

Step 4: Multiply the divisors to find the LCM 7, 18 and 21

7 × 3 × 6 = 21

LCM(7, 18, 21) = 126

The least common multiple for three numbers 7, 18, and 21 is 126

You might be interested in

Simplify. Your answer should contain only positive exponents with no fractional exponents in the denominator.

mart [117]

Answer:

$\dfrac{x^{\frac{2}{3}}y^{\frac{1}{4}}}{4y^{2}}$ .

Step-by-step explanation:

The given expression is

$\dfrac{3y^{\frac{1}{4}}}{4x^{-\frac{2}{3}}y^{\frac{3}{2}}\cdot 3y^{\frac{1}{2}}}$

We need to simplify the expression such that answer should contain only positive exponents with no fractional exponents in the denominator.

Using properties of exponents, we get

$\dfrac{3}{4\cdot 3}\cdot \dfrac{y^{\frac{1}{4}}}{x^{-\frac{2}{3}}y^{\frac{3}{2}+\frac{1}{2}}}$ $[\because a^ma^n=a^{m+n}]$

$\dfrac{1}{4}\cdot \dfrac{y^{\frac{1}{4}}}{x^{-\frac{2}{3}}y^{2}}$

$\dfrac{1}{4}\cdot \dfrac{x^{\frac{2}{3}}y^{\frac{1}{4}}}{y^{2}}$ $[\because a^{-n}=\dfrac{1}{a^n}]$

$\dfrac{x^{\frac{2}{3}}y^{\frac{1}{4}}}{4y^{2}}$

We can not simplify further because on further simplification we get negative exponents in numerator or fractional exponents in the denominator.

Therefore, the required expression is $\dfrac{x^{\frac{2}{3}}y^{\frac{1}{4}}}{4y^{2}}$ .

5 0

3 years ago

Quadrilateral A’ B’ C’ D’ is a dilation of quadrilateral ABCD about point P with a scale factor of 2 and a half .

salantis [7]

It is an enlargement because the scale factor is 2 and a half

8 0

3 years ago

Read 2 more answers

What is the lower quartile of the data 25 8 10 35 5 45 40 30 20

Ray Of Light [21]

I believe the answer would be 9.

4 0

3 years ago

If CE=7 in and AE=23 in AC=

dusya [7]

I think it = 16 but then again I could be wrong

3 0

3 years ago

Read 2 more answers

A line going through the points (-3, -10) with a slope m = 1/4.

vfiekz [6]

Step-by-step explanation:

(-3,5) and (x,y)

Slope = (y - 5)/[x - (-3)] = (y - 5)/(x + 3)

(y - 5)/(x + 3) = -1/4

y - 5 = -1/4(x + 3)

y - 5 = (-1/4)x - 3/4

y = (-1/4)x - 3/4 + 5

y = (-1/4)x + 17/4.

4 0

2 years ago