All categories

2 years ago

If the sum of the roots of the equation 3x² + kx + 1 = 0 is 7. then what the value of k

Mathematics

1 answer:

koban [17]2 years ago

7 0

Answer:

The value of k is -21

Step-by-step explanation:

ax² + bx + c = 0

Sum of the roots = -b/a

3x² + kx + 1 = 0

= sum of the roots = -k/3

-k/3 = 7

Now, Multiply both side by (-3) we get,

(-3)-k/3 = 7(-3)

k = -21

Thus, The value of k is -21

-TheUnknownScientist 72

You might be interested in

Convert 4.5 in to a fraction

jenyasd209 [6]

Answer:

9/2

Step-by-step explanation:

1. Turn the equation into a fraction: 4.5/1

2. Multiply top and bottom by two: 9/2

6 0

3 years ago

Read 2 more answers

A jet ski rental charges a flat rate of $75, plus an additional $60 per hour. You do not want to spend more than $200. How many

yawa3891 [41]

Answer:

22.5

Step-by-step explanation:

You time 75 by 60. Then, you divided it by 200. The answer is 22.5.

5 0

3 years ago

Mrs. Giuntini’s lawn is triangle shaped with a base of 25 feet and a height of 10 feet. What is the area of Mrs. Giuntini’s lawn

Vedmedyk [2.9K]

$area \: = \frac{1}{2} bh \\ area \: = \frac{1}{2} (25)(10) \\ area = \frac{1}{2} 250 \\ area = 125 \: feet ^{2}$

4 0

3 years ago

Read 2 more answers

A rectangle has an area of 99 square in. What is the length of the long side?

OLga [1]

Answer:

The longer length is either 99, 33 or 11 inches

Step-by-step explanation:

Given

$Area = 99$

Required

The length of the longer side

Area of a rectangle is:

$Area = Length * Width$

List out all possible products that give 99 [Assume the dimension are whole numbers]

$Length * Width = 99 * 1 = 99$

$Length * Width = 33 * 3 = 99$

$Length * Width = 11 * 9 = 99$

List out the longer factors

$L = \{99, 33, 11\}$

Hence, the longer length is either 99, 33 or 11 inches

8 0

3 years ago

The graph below shows the winter precipitation in Arizona from 1995 to 2002. It also shows the survival rates of Arizona prongho

Nana76 [90]

Answer:

* 1998 and 2001 had the most precipitation.

* The best years for survival were 1998 and 2001.

* One reason would be that precipitation rates are connected to plants as well. Fawns are herbivores, meaning they eat plants, so if the plants are well nourished by rain and growing, fawns will have plenty to eat. Sorry that I don’t know the second reason the two factors are connected.

* Fawns would most likely go extinct if the precipitation rate continues to go down.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

If the sum of the roots of the equation 3x² + kx + 1 = 0 is 7. then what the value of k​

If the sum of the roots of the equation 3x² + kx + 1 = 0 is 7. then what the value of k