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
olchik [2.2K]
3 years ago
7

10. Solve for all values of x algebraically (find the zeroes): 3x^2 +12x – 7 = x^2+ 3x – 2

Mathematics
1 answer:
ipn [44]3 years ago
4 0

Answer:

x = -5 or 1/2

Step-by-step explanation:

From the question,

3x²+12x-7 = x²+3x-2

Collect like terms

3x²-x²+12x-3x-7+2 = 0

2x²+9x-5 = 0

Using factorization method to solve the quadratic equation

2x²+10x-x-5 = 0

(2x²+10x)-(x+5) = 0

2x(x+5)-1(x+5) = 0

(x+5)(2x-1) = 0

Either,

x+5 = 0

x = -5

or,

2x-1 = 0

2x = 1

x = 1/2.

Therefore,

x = -5 or 1/2

You might be interested in
A yellow ribbon is 56 centimeters long. It is twice as long as a green ribbon. A brown ribbon is 4 times as long as the green ri
Shkiper50 [21]

56 dived by 2 equals 28. 28=green ribbon. Brown ribbon is 4 times as long. 28 times 4 equals 112. The brown ribbon is 112 cm long.

6 0
3 years ago
Solve for x<br><br>O 5.5<br>O 6.5<br>O 7.5<br>O 8.5<br>​
Leni [432]

Answer:

x= 120

Step-by-step explanation:

x+60=180

x=180-60

x=120

4 0
3 years ago
Find the product of 18 and 287.<br><br> 0 4,066<br><br> 2,583<br><br> 5,166<br><br> O 4,516
PtichkaEL [24]

Answer:

C. 5,166

Step-by-step explanation:

because of the word product, it means multiplication

7 0
4 years ago
the volumes of two similar figures are 729 mm and 2744 mm if the surface area of the larger figure is 392 mm what is the surface
Stolb23 [73]
We know that
[volume of larger figure]=[scale]³*[volume of smaller figure]
scale=∛(volume of larger figure/volume of smaller figure)
scale=∛(2744/729)-----> 1.56

[surface area of the larger figure]=scale²*[<span>surface area of the smaller figure]
</span>[surface area of the smaller figure]=[surface area of the larger figure]/scale²
[surface area of the smaller figure]=[392]/1.56²----> 162 mm²

the answer is
the surface area of the smaller figure is 162 mm²
7 0
3 years ago
Evelyn answered 42 questions correctly on her multiple choice history final and earned a grade of 21%. How many total questions
Thepotemich [5.8K]

Answer:

200 questions

Step-by-step explanation:

Given data

Let the total questions be x

so that

21% of x= 42 questions

let us solve for x

21/100*x= 42

0.21*x= 42

0.21x= 42

Divide both sides by 0.21

x= 42/0.21

x= 200 questions

Hence the questions are 200 questions

4 0
3 years ago
Other questions:
  • The department store sells logo t-shirts at an original price of $12.50. Every month that a t-shirt doesn’t sell, the store redu
    15·2 answers
  • Find the value of x. With the numbers 18 and 2x-5
    9·1 answer
  • A tractor trailer's maximum load is 32,000 pounds. If it is already carrying a forklift that weighs 8,200 pounds, how many 250-p
    7·1 answer
  • 7.4375 as a mixed number in simplest form
    10·1 answer
  • In 2005 USC beat UCLA by 47 points. Together the two teams scored a total of 85 points. Give the final sore of this game
    12·2 answers
  • Hugo is paid $119 for 8.5 hours of work.<br><br>What is his rate of pay per hour
    10·2 answers
  • 8) BRAINLIEST + 15 POINTS! HELP ASAP!! :)
    13·1 answer
  • during a figure skating routine Jackie and Alex begin together and skate apart. The angle between them is 20 degrees Alex skates
    5·1 answer
  • Hey i need some help with a fraction this is the question 17*5/8
    15·2 answers
  • Which equation represents a function that is nonlinear?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!