3 years ago

Please help ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing.

Mathematics

1 answer:

ElenaW [278]3 years ago

3 0

Answer:

x = -2 ±sqrt(7)

Step-by-step explanation:

3x^2 +12 x = 9

Divide each side by 3

3x^2 /3 +12x/3 = 9/3

x^2 +4x = 3

Take the coefficient of x

Divide by 2

4/2 =2

Square it

2^2 =4

Add it to each side

x^2 +4x+4 = 3+4

x^2 +4x+4 = 7

(x+2)^2 = 7

Take the square root of each side

x+2 = ±sqrt(7)

Subtract 2 from each side

x+2-2 = -2 ±sqrt(7)

x = -2 ±sqrt(7)

You might be interested in

Please write in slope intercept form I’m struggling y+4=-7(x-3)

klemol [59]

Answer:

y = -7x + 17

Step-by-step explanation:

you want to isolate the 'y' variable, start by distributing -7 on the right side

y + 4 = -7x + 21

now subtract 4 from each side

y = -7x + 17

8 0

3 years ago

Read 2 more answers

I am confused about the order to go about doing this problem because I tried multiplying first and then dividing but my answer w

guajiro [1.7K]

50÷(-25)x(4)
50/-25= -2
-2 x 4= -8
Sorry I realized I put 24 Oops...
But Ctapia037 is right.

7 0

3 years ago

Read 2 more answers

PLEASE HELP I NEED HELP IN THIS GRADE 11 MATH PLS

seropon [69]

Answer:

radius and number rotation

4 0

2 years ago

The Eurasian tectonic plate travels at a

Ronch [10]

Answer:

17.5 cm

Step-by-step explanation:

Multiply 0.7 by 25 to get 17.5 cm.

Hope it helped.

8 0

3 years ago

Find the area of a triangle with a base of 7.5 m and a height of 4*

oksian1 [2.3K]

Answer:

15 units²

Step-by-step explanation:

Hi there!

$A=\displaystyle\frac{1}{2} bh$ where b is the base and h is the height

Plug in the base (7.5) and height (4):

$A=\displaystyle\frac{1}{2} (7.5)(4)\\\\A=\displaystyle\frac{1}{2} (30)\\\\A=15$

Therefore, the area of the triangle is 15 units².

I hope this helps!

8 0

3 years ago