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Annette [7]
3 years ago
13

Which of the following is not a characteristic of non-Euclidean geometry?

Mathematics
1 answer:
kumpel [21]3 years ago
7 0
C.
<span>The parallel postulate is false.
</span>I hope that right

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An instructor wants to write a test with 25 questions where each question is worth 3, 4, or 5 points based on difficulty. He wan
irakobra [83]

ANSWER

Find out the how many 3, 4, and 5 point questions could there be.

To proof

Let us assume that the 3 points based question be = x

Let us assume that the 4 points based question be = y

Let us assume that the 5 points based question be = z

As given

An instructor wants to write a test with 25 questions

than the equation become in the form

x + y + z = 25

he quiz to be worth a total of 100 points.

than the equation is becomes

3x + 4y + 5z =100

As given

He wants the number of 3-point questions to be 4 less than the number of 4-point questions

x = y -4

Than the three equation are

x + y + z = 25 ,3x + 4y + 5z =100 and x = y -4

put  x = y -4 in the x + y + z = 25 ,3x + 4y + 5z =100

than

2y + z = 29, 7y +5z= 112

multiply 2y + z = 29 by 5 and subtracted 7y +5z= 112

10 y -7y + 5y -5y = 145 -112

3y = 33

y = \frac{33}{3}

y =11

put in the  x = y -4

x = 11-4

x= 7

put the value of x ,y in the x + y + z = 25

7 + 11 +z =25

18 +z = 25

z = 25 -18

z=7

therefore

numbers of the 3 point question be = 7

numbers of the 4 point question be = 11

numbers of the 5 point question be = 7

Hence proved



3 0
3 years ago
Problem is in the picture. HELP asap please!! I’m so confused
sashaice [31]

Answer:

equation is

2(x+10x)=1540

width= 70ft

length= 700ft

<em>hope</em><em> </em><em>it</em><em> </em><em>helps</em>

<em>plz</em><em> </em><em>mark</em><em> </em><em>bra</em><em>inliest</em>

5 0
3 years ago
Read 2 more answers
4|6-8| absolute value
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I think it’s 8 ( I’m not sure )
4 0
3 years ago
Read 2 more answers
Ummm i don’t understand these I just started can someone help
bixtya [17]

so for question 2 find the area of the rectangle first:

15 \times 19 = 285

then you find the area of the triangles:

15 \times 13 = 195 \\ 195 \div 2 = 97.5

15 \times 11 = 165 \\ 165 \div 2 = 82.5

Add up all the answers:

285 + 97.5 + 82.5 = 465

and for question 3, part A, you just find the area of the 2 boxes and multiply:

5 \times 5 = 25 \\ 25 \times 2 = 50

2 \times 5 = 10 \\ 10 \times 4 = 40

40 + 50 = 90

so the surface area of the box is 90 square inches therefore the paint covered 90 square inches. For part B, just add up the length of the thick black lines:

5 + 5 + 5 + 5 + 2 + 5 + 5 + 5 + 5 + 5 + 5 + 2 + 5 + 5 = 64

How these helped have a good day

8 0
3 years ago
Simplify each expression by distributing and combined bf like terms (SHOW WORK) please
GarryVolchara [31]

Answer:

c - 39

Step-by-step explanation:

<em>Given</em><em>,</em>

<em>-</em><em>4</em><em> </em><em>(</em><em>8</em><em> </em><em>-</em><em> </em><em>c</em><em> </em><em>)</em><em> </em><em>-</em><em> </em><em>(</em><em>3</em><em>c</em><em> </em><em>+</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>-</em><em>4</em><em> </em><em>(</em><em> </em><em>-c </em><em>+</em><em> </em><em>8</em><em> </em><em>)</em><em> </em><em>-</em><em> </em><em>(</em><em>3</em><em>c</em><em> </em><em>+</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>4</em><em>c</em><em> </em><em>-</em><em> </em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>(</em><em> </em><em>3</em><em>c</em><em> </em><em>+</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>4</em><em>c</em><em> </em><em>-</em><em> </em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>3</em><em>c</em><em> </em><em>-</em><em> </em><em>7</em>

<em>=</em><em> </em><em>(</em><em> </em><em>4</em><em> </em><em>-</em><em> </em><em>3</em><em> </em><em>)</em><em>c </em><em>+</em><em> </em><em>(</em><em> </em><em>-</em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>c </em><em>+</em><em> </em><em>(</em><em> </em><em>-</em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>7</em><em>)</em>

<em>=</em><em> </em><em><u>C </u></em><em><u>-</u></em><em><u> </u></em><em><u>3</u></em><em><u>9</u></em>

<em><u>hope </u></em><em><u>this </u></em><em><u>answer </u></em><em><u>helps </u></em><em><u>you </u></em><em><u>dear!</u></em><em><u> </u></em><em><u>take </u></em><em><u>care!</u></em>

8 0
2 years ago
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