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3 years ago

What is the lcm of 6 12 and 15

1 answer:

3 0

6, 12 18 24 30 36 42 48 54 60...
12, 24 36 48 60...
15, 30 45 60...

Voila. 60 shows up in all three. Its the first one to show up, hence lcm (least common multiple)

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Help asap please: Solve x-7y=16 for y

Pepsi [2]

Answer:

y = (x-16)/7

Step-by-step explanation:

x - 7y = 16

~Subtract x to both sides

-7y = 16 - x

~Divide -7 to everything

y = (16-x)/7

Best of Luck!

5 0

3 years ago

Read 2 more answers

How many roots does this has? x^2+(2√5x)+2x=-10 find Discriminant

Alexxandr [17]

Given:

The equation is

$x^2+(2\sqrt{5})+2x=-10$

To find:

The number of roots and discriminant of the given equation.

Solution:

We have,

$x^2+(2\sqrt{5})x+2x=-10$

The highest degree of given equation is 2. So, the number of roots is also 2.

It can be written as

$x^2+(2\sqrt{5}+2)x+10=0$

Here, $a=1, b=(2\sqrt{5}+2), c=10$ .

Discriminant of the given equation is

$D=b^2-4ac$

$D=(2\sqrt{5}+2)^2-4(1)(10)$

$D=20+8\sqrt{5}+4-40$

$D=8\sqrt{5}-16$

$D\approx 1.89>0$

Since discriminant is $8\sqrt{5}-16\approx 1.89$ , which is greater than 0, therefore, the given equation has two distinct real roots.

3 0

3 years ago

¿Cuál es el ángulo complementario de 9°?

Ann [662]

Answer:

90 - 9 = 81°

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

How do I find cube roots

anyanavicka [17]

Answer:

Step-by-step explanation:

5-500 is sqare 5

6 0

3 years ago

Solve equation by completing the square round to the nearest hundredth if necessary X2-4x-=5

kipiarov [429]

Answer:

x=-1 and x=5

Step-by-step explanation:

we have

$x^{2} -4x=5$

Solve it by completing the square method

We take the coefficient of x that is -4, divide it by 2 and then square it

$-\frac{4}{2}=-2$

square it

$(-2)^2 = 4$

Adds 4 both sides

$x^{2} -4x+4=5+4$

Combine like terms right side

$x^{2} -4x+4=9$

Rewrite as perfect squares

$(x-2)^{2}=9$

take square root both sides

$x-2=\pm3$

$x=2\pm3$

therefore

$x=2+3=5$

$x=2-3=-1$

6 0

4 years ago