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Svet_ta [14]
3 years ago
12

A quadrilateral is sometimes a square? True or False

Mathematics
2 answers:
Vesnalui [34]3 years ago
7 0
I know this ...... it is false
Papessa [141]3 years ago
6 0
The answer should be false
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Find the value(s) of "k" that will cause the equation 4x^2 +kx + 4 to have one real solution.
Andreas93 [3]

Answer:  k = {8, -8}

<u>Step-by-step explanation:</u>

In order for a quadratic equation to have exactly one solution, the discriminant must equal zero.       →        b² - 4ac = 0

  4x² + kx + 4 = 0

  ↓       ↓      ↓

a=4    b=k    c=4

b² - 4ac = 0

k² - 4(4)(4) = 0

k²             = 64

           k = √64

           k = ± 8

6 0
3 years ago
Isabella purchased 3 books from the book store. She now owns 11 books that she wants to read before the end of the year. If x re
Vesna [10]
The answer is X = 11 - 3. This is because to calculate the original value of how many books Isabella had, you have to take away the amount purchased from the overall total amount. Therefore, the equation is x = 11-3
4 0
3 years ago
2x+y=3<br>x-y= 1<br><br>solve the equation ​
svetlana [45]

Answer:

x = 4/3

y = 1/3

Step-by-step explanation:

System of equations! This is set up really well to make the second equation equal x then substitute.

x - y = 1

x = 1 + y

and then our substitution:

2 (1+y) + y = 3

and solve:

2 + 2y + y = 3

3y + 2 = 3

3y = 1

y = 1/3

And now we can substitute that value into one of our equations:

x - (1/3) = 1

x = 4/3

Next we should check by substituting these values into both of our equations:

2 (4/3) + (1/3) = 3

9 / 3 does equal 3 !

(4/3) - (1/3) does equal 1 !

Therefore, x = 4/3 , and y = 1/3

4 0
3 years ago
Read 2 more answers
Can someone please help me I really need help please help me thank you
Scilla [17]
A shape with 4 angles always have 360 degrees altogether.

Which means:
43 + 167 + 90 + y = 360
y = 360 - 43 - 167 - 90
y = 60
4 0
3 years ago
What is the percent of decrease from 25 to 15? Round your answer to the nearest tenth.
Dahasolnce [82]

Answer: 60%

Step-by-step explanation:

25=100%

50%=12.5

10%=2.5

12.5(50%) +2.5(10%)= 50%(15)

so the answer is 60%

7 0
2 years ago
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