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3 years ago

What is the lcm of 3,9, and 15?

2 answers:

7 0

The LCM of any set of numbers that has a prime or a number of primes in common. The way to find it is to factor the given number down to it's primes.

3: 3

9: 3 * 3

15: 3 * 5

The number which has been bolded is the LCM in this case 3 <<<< Answer

This is not a particularly good question to learn what it might be Try these 3 numbers.

42: 2*3 * 7

84: 2 * 2 * 3 * 7

210: 2*5 * 3 * 7

The LCM for this bunch is 2 * 3 * 7 = 42

s344n2d4d5 [400]3 years ago

3 0

The least common multiple that is common in all numbers but is the lowest is 3 and it's the only number that all numbers listed can be divided easily by.

Hope this helps!

You might be interested in

Y - 5 = 3/2(x+2) using that for a fraction write an equation in sloped intercept form

Licemer1 [7]

In slope intercept form this is equal to y=3/2x+8. If you want it in decimal form it would be y=1.5x+8.

8 0

3 years ago

Point slope graph y+2÷4(x+5)

ladessa [460]

Answer:

See attachment for graph

The slope intercept form is $y=4x+18$

Step-by-step explanation:

Assuming you want to graph the straight line given in point-slope form as

$y+2=4(x+5)$

Then we need at least two points on this line

When we compare to the point-slope formula $y-y_1=m(x-x_1)$ then we obtain (-5,-2) as a point on this line so we plot it.

When x=0, y=4(0+5)-2=18 so we plot (0,18)

We then draw a straight line through as shown in the attachment.

On the other hand, if you had wanted the equation slope intercept form, then we expand to obtain:

$y+2=4x+20$

$\implies y=4x+20-2$

$\implies y=4x+18$

3 0

3 years ago

I do not get it because i never learned coefficient i

aleksley [76]

1/4

The coefficient is the number attached to a variable.

7 0

3 years ago

Solve for x. PLZ WAIT FOR THE PHTO TO UPLOAD

stepan [7]

6x² - 5x + -21 = 0

Because this whole equation equals zero, we must simply factorize the first half of the equation, or the left side.

(3x - 7)(2x + 3) = 0

I was never really taught a specific way to factorize, so I usually just guess and check when factorizing. It usually takes a long time, it always gives you the tight answer.

Then, take each equation and make it equal zero.

3x - 7 = 0 AND 2x + 3 = 0

3x - 7 = 0

Add 7 to both sides.

3x = 7

Divide both sides by 3.

x = 7/3

Now, we do our second equation.

2x + 3 = 0

Subtract 3 from both sides.

2x = -3

Divide both sides by 2.

x = -3/2

So, x = 7/3 AND x = -3/2

So, your answer is C) x = 7/3, x = -3/2

~Hope I helped!~

7 0

3 years ago

What is the slope of the line that contains the point (-1,8) and (5,-4) answer.com?

pshichka [43]

THE SLOPE IS -2

if we have the coordinates of two points on a line, we can find the slope with this formula:
$s = \frac{y2 - y1}{x2 -x1} = \frac{y1 - y2}{x1 - x2}$
so the slope is
$\frac{8 - ( - 4)}{ - 1 - 5} = \frac{12}{ - 6} = - 2$
the answer is -2

good luck

5 0

3 years ago