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3 years ago

3x^2+24x+9=0 in vertex form (completing the square)

Mathematics

1 answer:

Drupady [299]3 years ago

6 0

Answer:

I tried everything and either I'm doing it wrong or you wrote this wrong

Step-by-step explanation:

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Find tanθ + sinθ for the angle below.

larisa [96]

tan( tehta ) = 2/3

Sin( tetha ) = 2/√13

tan( tetha ) + Sin( tetha ) = 2/3 + 2/√13

= 2√13 + 6 / 3√13

5 0

2 years ago

Factorise x^2/4-y^2/4

Nuetrik [128]

Answer:

$\large\boxed{\left(\dfrac{x}{2}-\dfrac{y}{2}\right)\left(\dfrac{x}{2}+\dfrac{y}{2}\right)=\dfrac{x-y}{2}\cdot\dfrac{x+y}{2}}$

Step-by-step explanation:

$\dfrac{x^2}{4}-\dfrac{y^2}{4}=\dfrac{x^2}{2^2}-\dfrac{y^2}{2^2}\qquad\text{use}\ \left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}\\\\=\left(\dfrac{x}{2}\right)^2-\left(\dfrac{y}{2}\right)^2\qquad\text{use}\ (a-b)(a+b)=a^2-b^2\\\\=\left(\dfrac{x}{2}-\dfrac{y}{2}\right)\left(\dfrac{x}{2}+\dfrac{y}{2}\right)=\dfrac{x-y}{2}\cdot\dfrac{x+y}{2}$

3 0

3 years ago

Can you help me on attached picture

saveliy_v [14]

Answer:

its 15 lol

this is elementary school or something???

Step-by-step explanation:

3 * x =9

then do 9/3=3

So you are multiplying by 3

So therefore you would do that to 5 so its 9/15

and 9/15 and 3/5 are the same, just that 9/15 isnt simplified

hope this helps have a nice day!!

3 0

2 years ago

Read 2 more answers

6y+5x=8 x3y=-7 use substituion

UNO [17]

Substitution:

6y + 5x = 8
x + 3y = -7

x = -3y + 7

6y + 5(-3y + 7) = 8
6y - 15y + 35 = 8
-9y + 35 = 8
-9y = -27
-y = -3
y = 3

x = -7 + 9
x = 2

y = 3
x = 2

3 0

2 years ago

What is the mean of the set of data?

krek1111 [17]

The answer is c 10 .....

8 0

3 years ago