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
Romashka-Z-Leto [24]
3 years ago
14

Solve by factoring: 2x2 - 5x - 12 = 0

Mathematics
2 answers:
Mumz [18]3 years ago
8 0

Answer:

2 {x}^{2}  - 5x - 12 = 0 \\ 2 {x}^{2}  - 8x + 3x - 12 = 0 \\ 2x(x - 4)3(x - 4) = 0 \\ \\  2x + 3 = 0 \\ 2x = 0 - 3 \\  \frac{2x }{2}  =  \frac{ - 3}{2}  \\ x =  \frac{ - 3}{2}  \\  \\ x - 4 = 0 \\ x = 0 + 4 \\ x = 4

Zepler [3.9K]3 years ago
5 0

Step-by-step explanation:

2 {x}^{2}  - 5x - 12

2 {x}^{2}   - 8x  + 3x - 12

2x(x - 4) + 3(x - 4)

2x  + 3 = 0 \:  \: x - 4 = 0

x =  \frac{ - 3}{2}  \:  \: x =4

You might be interested in
Twice the difference of a number and 5 is 2.<br> Use the variable W for the unknown number
Kitty [74]
Hey there!

The difference of a number, w, and 5 will be represented by (w – 5). Twice this would simply multiply this expression by 2, making it 2(w – 5). Finally, just set this expression equal to 2. Your equation is 2(w – 5) = 2. 

To solve this, expand the two to the terms in parentheses. Then, solve the rest of the way as you would normally, using addition, subtraction, multiplication, or division to cancel out and move around terms. Remember, what you do on one side must be done to the other!

2(w – 5) = 2
(2*w – 2*5) = 2
(2w – 10) + 10 = (2) + 10
(2w) ÷ 2 = (12) ÷ 2
w = 6

Hope this helped you out! :-)
8 0
3 years ago
For<br>Find The average speed when a car travels<br>130 miles in 2 12 hours? <br><br><br>​
Schach [20]

Answer:

Average speed=52 miles per hour

Step-by-step explanation:

The expression for calculating the average speed is as follows;

S=D/T

where;

S=average speed

D=distance traveled

T=time taken

In our case;

S=unknown

D=130 miles

T=2 1/2 hours=2.5 hours

replacing;

Average speed=130/2.5=52 miles per hour

Average speed=52 miles per hour

3 0
3 years ago
=
Fittoniya [83]

Answer:

1036

Step-by-step explanation:

First you have to times what she is earning, times the 7 days. that is the best I can explain

7 0
3 years ago
A square with side lengths of 4 units is translated on the coordinate plane. One vertex of the image is at (2, 1). Which ordered
nirvana33 [79]
It says that's 4 units distant from the another vertex. So, if a square is formed by 4 equal sides and 4 right angles, then you just have to add 4 units on x or y.

-> (2, 1) -> + 4 units on X
-> = (6, 1)
or
-> (2, 1) -> +4 units on Y
-> = (2, 5)

(2, 5) isn't an answer so the unique possible answer is (6, 1)


Answer: (6, 1)
3 0
2 years ago
Read 2 more answers
Graphing required<br><br> ANSWER ASAP
Debora [2.8K]
This is the right answer

4 0
3 years ago
Other questions:
  • The domain of f(x) is the set of all real values except 7, and the domain of g(x) is the set of all real values except –3. Which
    8·1 answer
  • The price of a pair of shoes is $28. The sales tax rate is 2.39 percent. What is the total amount you would pay if you bought th
    15·1 answer
  • A student is raising money for cancer research. A local business agrees to donate an additional 25% of what the student raises,
    5·2 answers
  • Which polygon has an interior angle sum of 1080
    12·2 answers
  • Katya is baking cookies that require 8 1/2 grams of vanilla paste per batch. She has 22 1/5 grams of vanilla paste. How many bat
    5·2 answers
  • (-4) (9)<br> -----------<br> (-6)
    13·1 answer
  • The diagram shows a convex polygon<br><br> solve for b
    15·1 answer
  • What can be concluded if ∠EJS and ∠SJV form a linear pair?
    11·1 answer
  • Can someone help it’s might be 4.5 but I’m not sure
    13·1 answer
  • Don’t understand need help please
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!