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Yanka [14]
2 years ago
9

1.7.3 Quiz: interacting lines and proofs Question 2 of 10

Mathematics
1 answer:
Kryger [21]2 years ago
5 0

Answer:

C. ∠SOE and ∠DOA

D. ∠EOA and ∠DOS

Step-by-step explanation:

Vertical angles are congruent angles.

From the given figure, the vertical angles are...

∠SOE and ∠DOA

∠EOA and ∠DOS

<u>---------------------------</u>

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the units digit of a two-digit number is twice the tens digit. If the digits are reversed, the new number is 9 less than the ori
Anton [14]

Answer:

36

Step-by-step explanation:

Here is the correct and complete question: The units digit of a two-digit number is twice the tens digit. If the digits are reversed, the new number is 9 less than twice the original number. What is the original number?

Lets assume the original number be"10y+x". (x is unit digit and y is 10th digit)

∴ if number is reversed then resulting number be "10x+y".

As given: x= 2y

        and 10x+y= 2(10y+x)-9

Now, solving the equation to get original number.

10x+y= 2(10y+x)-9

Distributing 2 to 10y and x, then opening the parenthesis.

⇒ 10x+y= 20y+2x-9

subtracting by (2x+y) on both side.

⇒ 8x= 19y-9

subtituting the value of "x", which is equal to 2y.

∴ 8\times 2y= 19y-9

⇒ 16y=19y-9

subtracting both side by (16y-9)

⇒ 3y= 9

cross multiplying

We get, y= 3

y=3

∵x= 2y

x=2\times 3= 6

∴ x= 6

Therefore, the original number will be 36 as x is the unit number and y as tenth number.

6 0
3 years ago
PLS, I NEED HELP DUE IN 3 HOURS! 25 POINTS
Bad White [126]

Answer:

B

Step-by-step explanation:

y = 6x + 3 Step-by-step explanation:Givenx = {5, 6, 7, 8, 9}

7 0
2 years ago
I need help please and thank you
ozzi

Answer:

-2480

Step-by-step explanation:

31 * -80 =-2480

Not sure how to explain this more, but I hope this helps!

3 0
3 years ago
Read 2 more answers
X
ziro4ka [17]

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

tinyurl.com/wpazsebu

7 0
3 years ago
Solve this equation 90x-60y is equal to 68 and 90x-70y is equal to 91​
Tanzania [10]

Answer:

Step-by-step explanation:

90x - 60y = 68.....multiply by -1

90x - 70y = 91

---------------------------

-90x + 60y = -68 (result of multiplying by -1)

90x - 70y = 91

---------------------------add

-10y = 23

y = -23/10 <===

90x - 60y = 68

90x - 60(-23/10) = 68

90x + 138 = 68

90x = 68 - 138

90x = - 70

x = -70/90

x = -7/9 <=====

3 0
3 years ago
Read 2 more answers
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