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
worty [1.4K]
3 years ago
5

Given a quadrilateral with sides 4 cm, 5 cm, 12 cm, and y (where the length of y is unknown), the length of y must be between 1

cm and 18 cm.
Which of the following is a counterexample to this conjecture?
A. y = 21.5 cm
B. y = 20 cm
C. y = 22 cm
D. y = 24 cm
Mathematics
1 answer:
lord [1]3 years ago
8 0

Answer:

A, B, C, And D

Step-by-step explanation:

If y has to be between 1 and 18, neither of the choices go between that gap.

You might be interested in
Find the inner product for (-4,9,8) . (3,2,-2) and state whether the vectors are perpendicular.
drek231 [11]

Answer:

-10; no

Step-by-step explanation:

<h2>-4*3 + 9*2 + 8*-2 = -10</h2><h2></h2><h2>-10 does not equal 0 so it is not perpendicular</h2>

6 0
3 years ago
Jan spends part of her year as a member of a gym. She then finds a better deal at another gym, so she cancels her membership wit
valkas [14]

She spent 8 months in the 1st gym and 4 months in the 2nd gym

Step-by-step explanation:

Jan spends part of her year as a member of a gym.

  • She then finds a better deal at another gym so she cancels her membership with the first gym after x months
  • She spends the rest of the year, y months, with the second gym
  • The membership to the first gym costs $75 per month, while the membership for the second gym costs $45 per month
  • She ended up spending a total of $780 over the course of the year

We need to find how much time she spent at each gym

∵ She spent x months in the 1st gym

∵ She spent y months in the 2nd gym

∵ Her course is a year

- There are 12 months in a year

∴ x + y = 12 ⇒ (1)

∵ The membership to the first gym costs $75 per month

∵ The membership to the second gym costs $45 per month

∵ She ended up spending a total of $780 over the course

∴ 75x + 45y = 780 ⇒ (2)

Now we have a system of equations to solve it

Multiply equation (1) by -45 to eliminate y

∵ -45x - 45y = -540 ⇒ (3)

- Add equations (2) and (3)

∴ 30x = 240

- Divide both sides by 30

∴ x = 8

- Substitute the value of x in equation (1) to find y

∵ 8 + y = 12

- Subtract 8 from both sides

∴ y = 4

She spent 8 months in the 1st gym and 4 months in the 2nd gym

Learn more:

You can learn more about the system of equations in brainly.com/question/2115716

#LearnwithBrainly

4 0
3 years ago
CAN SOMEONE GIVE ME BRAINLEST I WILL GIVE YOU ONE
Sedaia [141]

Answer:

I will give u it.

4 0
2 years ago
Read 2 more answers
PLEASE HELP I WILL GIVE BRAINLEST
Korvikt [17]

Answer:

Angle WZY=31degrees

Step-by-step explanation:

5x+11=8x-1

11+1=8x-5x

12=3x

X=12/3

X=4

Substitute x=4 in 5x+11

5(4)+11=31

6 0
2 years ago
It costs Sally 20 cents to make a cup of lemonade, and she sells each cup for 50 cents. She is using the following identity to c
mote1985 [20]

She would make 3.00 dollars


50(10) - 20(10) = (10)(50 - 20)

500 - 200 = (10 * 30)

300 = 300


(10)(50 - 20) = 30(10)

(10 * 30) = 300

300 = 300

3 0
3 years ago
Other questions:
  • Find AB if ZB=3x-17 and ZA=x+5
    9·1 answer
  • Solve the equation <br> -7 (8a - 9 = - 23 + 4a
    13·1 answer
  • An item is regularly priced at $25. It is on sale for 80% off the regular price. What is the sale price?
    12·2 answers
  • Draw a triagle with 3 lines
    7·1 answer
  • Can someone please explain to me step by step how to do these
    15·1 answer
  • Eric purchased three music CDs and a sweatshirt from a band's online store and received a 20% discount. He paid $100 for his pur
    13·2 answers
  • How do you Order the numbers from least to greatest. -7 , -7.75, 1/2, 75%
    9·1 answer
  • How do I simplify? x2 – 4 divided by x2 + 5x + 6. When working with Functions
    5·1 answer
  • Which is greater -3/4 or -13/16​
    6·1 answer
  • Determine the total number of roots of each polynomial function. f (x) = 3x^6 + 2x^5 + x^4 - 2x^3
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!