1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Digiron [165]
2 years ago
5

3x^2 - 8x = x^2 + 42 Solve for x

Mathematics
2 answers:
nika2105 [10]2 years ago
4 0

Answer:

x=7,-3

Step-by-step explanation:

Move all terms to the left side and set equal to 0. Then set each factor = to 0.

san4es73 [151]2 years ago
3 0

Answer:

x = 7 , − 3

Step-by-step explanation:

if this help you please give me a crown

You might be interested in
Mrs.johnson is working on math with a group of students. she has a total of 15 students. 9 of them are girls. what is the ratio
Gnoma [55]

Answer:

6

Step-by-step explanation:

the rest are boys

7 0
3 years ago
You throw a ball up and its height h can be tracked using the equation h=2x^2-12x+20.
postnew [5]

<em><u>This problem seems to be wrong because no minimum point was found and no point of landing exists</u></em>

Answer:

1) There is no maximum height

2) The ball will never land

Step-by-step explanation:

<u>Derivatives</u>

Sometimes we need to find the maximum or minimum value of a function in a given interval. The derivative is a very handy tool for this task. We only have to compute the first derivative f' and have it equal to 0. That will give us the critical points.

Then, compute the second derivative f'' and evaluate the critical points in there. The criteria establish that

If f''(a) is positive, then x=a is a minimum

If f''(a) is negative, then x=a is a maximum

1)

The function provided in the question is

h(x)=2x^2-12x+20

Let's find the first derivative

h'(x)=4x-12

solving h'=0:

4x-12=0

x=3

Computing h''

h''(x)=4

It means that no matter the value of x, the second derivative is always positive, so x=3 is a minimum. The function doesn't have a local maximum or the ball will never reach a maximum height

2)

To find when will the ball land, we set h=0

2x^2-12x+20=0

Simplifying by 2

x^2-6x+10=0

Completing squares

x^2-6x+9+10-9=0

Factoring and rearranging

(x-3)^2=-1

There is no real value of x to solve the above equation, so the ball will never land.

This problem seems to be wrong because no minimum point was found and no point of landing exists

3 0
3 years ago
12 Times 12 = 144 right?
REY [17]

Answer:

yes it is u are correct

Step-by-step explanation: plz mark brainliest

5 0
3 years ago
What is 210 divided by 2 1/2
ki77a [65]

Answer:

210 divided 2 1/2= 84....

6 0
3 years ago
Read 2 more answers
The number 360 is increased by 25%. The result is then decreased by 50%. What is the final number?
Vladimir [108]
So if 360 is increased by 25%, you would end up with 450 (360 x 1.25), than if the result, 450 is decreased by 50% ( 450 x .50 = 225) (450 - 225 = 225) you would end up with 225.
3 0
3 years ago
Other questions:
  • What is the inverse of the function g ( x ) = − 3 ( x + 6 ) g(x)=−3(x+6)g, left parenthesis, x, right parenthesis, equals, minus
    13·1 answer
  • Large Reusable bottles cost four dollars more than small ones eat large bottles cost $24 less than small ones how much does one
    9·1 answer
  • The quotient of two numbers is 20. Their sum is 84. What are the two numbers?
    6·1 answer
  • F (x) = (x + 5)^3(x - 9)(x + 1)
    7·1 answer
  • It took 2 electricians 5 days to wire a house. How long would it take 10 electricians?
    10·2 answers
  • Help ASAP please both questions
    12·1 answer
  • At the beginning of 5th grade, Stephen was 48 inches tall. At the beginning of 8th grade he was 65 inches tall.
    9·2 answers
  • What is 7 divided by 43,786​
    12·1 answer
  • A Gallup Poll interviews a random sample of 2,500 Adult Americans to predict the opinions of all adults living in the United Sta
    5·1 answer
  • Help<br><br><br><br><br> YOUR PROB WITH THAT BLONDE GIRL... THAT ALWAYS MADE ME DOUBT
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!