All categories

2 years ago

What are the solutions to the quadratic equation below? 3x2 +16x + 21 = 0

Mathematics

2 answers:

kifflom [539]2 years ago

7 0

Answer:

-3 and -7/3

Step-by-step explanation:

You could solve by factoring.

To do that, you find 2 numbers that multiply to 21, but add up to 16 when you multiply one of them by 3.

In this case, 3 and 7 would work, because 3*3 + 7 = 16, and 3 * 7 = 21.

Therefore, we can factor the equation to (3x+7)(x+3).

The solutions of the equations are -3 and -7/3.

tatyana61 [14]2 years ago

6 0

X=-7/3,-3
Pls mark brainliest

You might be interested in

Giving 20 points and brainiest!

sladkih [1.3K]

Answer:

1/2,3/6,5/10,8/16

Step-by-step explanation:

they all equal 1/2

Im not sure if thats what it was asking but yea

6 0

2 years ago

Read 2 more answers

Describe fully the single transformation that maps triangle A onto triangle B

Anvisha [2.4K]

Answer:

180 degree clockwise rotation about center and a dilation of 0.5.

5 0

2 years ago

Draw a quicksilver and tell me witch one is your fav

andrew11 [14]

Answer: I can’t draw lol

But the comic version looks like he man it’s funny

Step-by-step explanation:

8 0

1 year ago

Read 2 more answers

What is x? where would i find it?는 무엇이고 내가 그것을 어떻게 찾을까?

kvv77 [185]

If you are implying that the triangles are similar, then the short and long legs are in proportion:

$3\div 2 = x\div 8$

Solving for x, you have

$x = \dfrac{8\cdot 3}{2} = 12$

5 0

2 years ago

The number of days that homes stay on the market before they sell in Houston is bell-shaped with a mean equal to 56 days. Furthe

antoniya [11.8K]

Answer:

D. 8

Step-by-step explanation:

We have been given that the number of days that homes stay on the market before they sell in Houston is bell-shaped with a mean equal to 56 days. Further, 95 percent of all homes are on the market between 40 and 72 days.

As per empirical rule 95% of the data on bell curve lies between 2 standard deviations of mean.

So we can set an equation as:

$72-56=2\sigma$ or

$40-56=-2\sigma$

$16=2\sigma$

$\frac{16}{2}=\frac{2\sigma}{2}$

$8=\sigma$

$40-56=-2\sigma$

$-16=-2\sigma$

$\frac{-16}{-2}=\frac{-2\sigma}{-2}$

$8=\sigma$

Therefore, the standard deviation for our given data is 8 and option D is the correct choice.

6 0

2 years ago