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
Vlad1618 [11]
3 years ago
7

Solve the equation 4x^2 - 12x = 7 algebraically for x.

Mathematics
1 answer:
azamat3 years ago
3 0
4x^2-12x=7\\4x^2-12x-7=0\\x=\frac{-b+-\sqrt{b^2-4ac}}{2a}\\x=\frac{-(-12)+-\sqrt{(-12)^2-4(4)(-7)}}{2(4)}\\x=\frac{12+-\sqrt{144+112}}{8}\\x=\frac{12+-\sqrt{256}}{8}\\x=\frac{12+-16}{8}\\x=\frac{-4,28}{8}\\x=\frac{-1}{2},\frac{7}{2}

x = -0.5, 3.5
You might be interested in
there are 6 twenty pound boxes and 8 sixty pound boxes of produce on a truck. how many pounds of produce are on the truck
Klio2033 [76]

6 *20 = 120

8 *60 = 480


120 + 480 = 600 pounds total

6 0
4 years ago
5x-6y=3 <br> 7y=2x+8 <br> Help me out please
zaharov [31]

Answer:

A) 5x-6y=3

B) 7y=2x+8

B) -2x + 7y = 8  then multiplying "B" by 2.5

B) -5x +17.5y = 20  then adding this to A

A) 5x -6y = 3

11.5y = 23

y = 2

x = 3

Step-by-step explanation:

3 0
3 years ago
Find the value of x round to the nearest tenth 11.2 12.6 17.5 35.7
Mashcka [7]

Answer: It’s not 17.5 I can tell you that:(( just got it wrong

Step-by-step explanation:

6 0
4 years ago
Read 2 more answers
|2x+5|-4=16 find both answers
attashe74 [19]

Answer:

x=7.5 and x=-12.5

Step-by-step explanation:

|2x+5|-4=16

|2x+5|=20

2x+5=20

2x=15

x=7.5

2x+5=-20

2x=-25

x=-12.5

6 0
4 years ago
What is the significance of a dashed and solid line on an inequality function?
Nadya [2.5K]

Answer:

Inequalities that use < or > symbols are plotted with a dashed line to show that the line is not included in the region. Inequalities that use ≤ or ≥ symbols are plotted with a solid line to show that the line is included in the region.

6 0
3 years ago
Read 2 more answers
Other questions:
  • -k+3k please help, middle school math
    10·1 answer
  • Pleas help. Just label you answer with them numbers and give me the letter answer.
    15·1 answer
  • If A || B and B | y, then ?
    7·1 answer
  • Please help me with this question my parents will not help explain it
    11·2 answers
  • if an angle is acute, then the measure of its complement must be greater than the measure of its supplement? a.true b.false
    6·1 answer
  • Can someone solve this
    14·2 answers
  • Slove the Equation <br> -8(k + 46) = -5.<br><br> (Please include step-by-step)
    11·2 answers
  • In a congressional district, 55% of the registered voters are Democrats. Which of the following is closest to the probability of
    14·1 answer
  • The exchange rate for converting US dollars to Chinese yuan is $6.11 how much is US$600 worth in China
    15·1 answer
  • Cheat on a test with me ;) LOL
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!