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
jekas [21]
3 years ago
8

Can someone help please, will give brainiest if correct!!!!

Mathematics
2 answers:
fiasKO [112]3 years ago
8 0

Answer:

AB = 4.5 cm

Step-by-step explanation:

Area = sum of areas of two rectangles

36 = [x(x - 4)] + [(x - 2)(2x + x)]

36 = x² - 4x + 3x² - 6x

4x² - 10x - 36 = 0

Dividing by 2:

2x² - 5x - 18 = 0

2x² - 9x + 4x - 18 = 0

x(2x - 9) + 2(2x - 9) = 0

(2x - 9)(x + 2) = 0

x = -2, 9/2

AB = x = 4½ cm

Bond [772]3 years ago
5 0

Answer:

AB = 9/2 cm

AB = 4.5 cm

Step-by-step explanation:

The area of small rectangle

x * (x-4) = x^2 -4x

The area of  the big rectangle

The height is 2x +x  and the width is x-2

(2x+x) * (x-2)

(3x) * (x-2)

3x^2 -6x

Add the areas together

x^2 -4x + 3x^2 -6x

4x^2 -10x

This is equal to 36

4x^2 -10x=36

Subtract 36 from each side

4x^2 -10x -36=36-36

4x^2 -10x-36=0

Divide each side by 2

2x^2 -5x -18=0

Factor

(x + 2) (2 x - 9) = 0

Using the zero product property

x+2=0  2x-9=0

x = -2   2x =9

x = -2   x = 9/2

Since we cant have a negative length

x = 9/2

AB = 9/2 cm

You might be interested in
A network charges $855,000 for a 30-second ad during a major televised sports event. The advertisers must purchase a minimum of
blondinia [14]
2,565,000 is the answer
7 0
3 years ago
Zoey needs at least $30 to buy a gift. She has $12. Which inequality could Zoey use to find out how much more money (m) she need
artcher [175]
30 ≤ 12 + m so d). 

Hope this helps! Please feel free to give brainliest if it does!
7 0
3 years ago
Read 2 more answers
On a test, 74% of the questions are answered correctly. If 111 questions are correct, how many questions are on the test?
Mashcka [7]

Answer:

150

Step-by-step explanation:

You have to divide the correct answers (111) by the total amount of questions (x) in order to find the 74% (0.74)

5 0
3 years ago
Read 2 more answers
Two miners are trying to push a stationary mine cart filled with gold. Miner A is exerting 25 N while miner B is exerting 20 N.
Oliga [24]

Answer:

b. 45 N

Step-by-step explanation:

The sum of the forces exerted by the two miners = 25 + 20

                                           = 45 N

Since after applying a force of 45 N by the two miners the cart remained stationary, it implies that a resistance force of at least 45 N acts against their push. Thus, the force exerted by the road could be equal to 45 N or greater than 45 N.

Probably, if the sum of the forces applied is 46 N, the cart would move. Which depends on the value of resistance force applied by the road. Thus, the appropriate answer from the given option is B.

Since the force applied on the cart equals the resistance force exerted by the road, the cart would not move.

6 0
3 years ago
2,4...16,32 what comes next<br>​
laiz [17]
The next one would be 64
3 0
3 years ago
Read 2 more answers
Other questions:
  • Kinesha collects data about the height of students in her science class. What measure of a center and variation are appropriate
    14·2 answers
  • A rectangular prism has a volume of 384 cubic centimeters. The width is twice the height, and the length is three times the heig
    15·1 answer
  • 17.
    7·1 answer
  • F and g are functions such that
    13·1 answer
  • Lisa sold 4 times as many candy bars as Tim. Lisa sold 24 candy bars. How many more candy bars did Lisa sell than Tim?
    5·1 answer
  • A,B,C, or D? I NEED HELP ON THIS QUESTION
    8·1 answer
  • Which function grows at the fastest rate for increasing values of x?
    5·1 answer
  • I NEED HELP QUICK #33 #34 #35
    10·1 answer
  • 5. Solve this system of equations for both x and y!<br> 0/1<br> 1/2x + 6y = 12<br> y = x + 15
    5·1 answer
  • Work out the size of angle a and angle b.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!