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
lina2011 [118]
3 years ago
8

For what value of r is the parallelogram a rhombus

Mathematics
1 answer:
Gre4nikov [31]3 years ago
5 0

Answer:

9

Step-by-step explanation:

7r+18=r²

r²-7r-18=0

factorizing

r²+2r-9r-18=0

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

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

r-9=0

r=9

check

(r²)=(9*9)=81

7r+18=7(9) + 8=81

You might be interested in
Linda enrolls for 10 credit-hours for each of two semesters at a cost of $500 per credit-hour (tuition and fees). In addition, t
kodGreya [7K]
I agree with the other answer
3 0
3 years ago
403, 892 in expanded form
eimsori [14]

Hey there!

<h3>"Expanded form" is basically, setting it up in a addition form to give you that result</h3>

4 = 400,000 \\  0 = 0 \\ 3 = 3,000  \\ 8 = 800 \\ 9 = 90 \\ 2 =2 \\ \\ \\ \\ Answer:  400,000 + 0 + 3,000 + 800 + 90 + 2

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

4 0
3 years ago
Please help<br><br>15 points bc I’m new and only have like 50. I’ll also give branliest
Veronika [31]
It’s 12

On the first side (smaller triangle/ ABC) the give you one side that equals 4 and on the next triangle (bigger triangle/ DEF) it’s 8 meaning you’re going to multiply each corresponding side by 2
6 0
2 years ago
Which is the graph of the function f(x) = one-halfx2 + 2x – 6?
guapka [62]

Answer:

1/2 x^2 + 2x - 6 = 0

(1/2 x - 1)(x + 6) = 0

zeroes are 2 and -6

so the graph intersects x axis at -6 and 2  

The only one to do that is diagram A  

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Identify the center and radius of the circle (x+4)^2+(y-2)^2=16
fgiga [73]

Answer: center is (-4,2) radius is 4

Step-by-step explanation:

Equation of circle

is (X-A)^2+(X-B)^2=r^2

The center Of The circle is (A, B)

The radius Of The circle is r

Comparing the given equation and the equation of a circle we get the center Of The circle as (-4,2) and then radius as 4

7 0
3 years ago
Other questions:
  • I don't understand this problem, please help?!?!?!
    12·1 answer
  • One month Mai rented
    7·1 answer
  • HELP WILL GET MARKED BRAINIEST!! Which conic section is defined by set of all points in a plane that are equidistant from a sing
    7·1 answer
  • how many times can a rectangle be reflected across an axis of symmetry so that it carries onto itself
    7·2 answers
  • PLEASE HELP; WILL GIVE BRAINLIEST - GEOMETRY
    5·1 answer
  • If the angles<br> are represented in degrees, find both angles:<br> sin(x + 7) = cos(4x + 8)
    14·2 answers
  • What is the value of x​
    9·1 answer
  • At 6 a.m., the temperature is 19.4°C. Between 6 a.m. and noon, the temperature rises 3.8°C. Between noon and 6 p.m., the tempera
    15·1 answer
  • Is it 90 IF NOT CAN SOMEONE TELL ME please
    13·1 answer
  • Please help!!! Which of the following expand (x + y)^5 using Pascal’s Triangle?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!