All categories

3 years ago

How many real number solutions does this have 3x^2 + 8x +7=0

Mathematics

1 answer:

kompoz [17]3 years ago

5 0

Answer:

zero

Step-by-step explanation:

The answer to that question is best found by looking at the value of the <em>discriminant</em>.

For quadratic ax^2 +bx +c = 0, the value of the discriminant is ...

d = b^2 -4ac

Here, you have a=3, b=8, c=7, so the discriminant is ...

d = 8^2 -4(3)(7) = 64 -84 = -20

When the discriminant is negative, both solutions are complex (not real).

There are zero real solutions to this equation.

You might be interested in

Help solve please i need it this is due tmr asap

Alecsey [184]

Answer:

It's 45 is it not? The coordinate is (1,45) I could be wrong. I believe it is D.

(Sorry if I am wrong!)

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

A bank loaned out $18,000, part of it at the rate of 6% per year and the rest at 16% per

ivann1987 [24]

Answer:

$6500

Step-by-step explanation

x = amount ($) loaned at 6%

then

18000-x = amount ($) loaned at 14%

.06x + .14(18000-x) = 2000

.06x + 2520-.14x = 2000

2520-.08x = 2000

-.08x = -520

x = $6,500

5 0

3 years ago

A jar contains 10 ounces of gumdrops, 3 ounces of licorice bits, and 3 ounces of jelly beans. How many more ounces of jelly bean

Andrew [12]

Answer:

10 jelly beans.

Step-by-step explanation:

Let x be ounces of jelly beans.

We have been given that a jar contains 10 ounces of gumdrops, 3 ounces of licorice bits, and 3 ounces of jelly beans.

To make weight of jelly beans be 50% of total assortment, we will add x ounces of jelly beans to 3 so that it will be 50% of total assortment plus x. We can represent this information in an equation as:

$3+x=\frac{50}{100}(10+3+3+x)$

Let us solve for x.

$3+x=0.50(16+x)$

$3+x=8+0.5x$

$3-3+x=8-3+0.5x$

$x=5+0.5x$

$x-0.5x=5+0.5x-0.5x$

$0.5x=5$

$\frac{0.5x}{0.5}=\frac{5}{0.5}$

$x=10$

Therefore, 10 jelly beans must be added to make the assortment 50 percent jelly beans in weight.

Let us cross check our answer.

$\frac{3+10}{3+3+10+10}=\frac{13}{26}=0.5=50\%$

6 0

3 years ago

there are x kids on the wrestling team.yesterday y kids were out sick.what fraction of the kids were absent yesterday

Grace [21]

Y/x kids were absent yesterday

8 0

3 years ago

Read 2 more answers

         There once lived an emperor named Claudius II. He noticed that men who were married didn't want to go to war and leave

borishaifa [10]

Answer:

D. to explain why Valentine's Day is celebrated

Step-by-step explanation:

8 0

3 years ago