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djyliett [7]
3 years ago
10

Helpppppppppppppp.....

Mathematics
1 answer:
steposvetlana [31]3 years ago
6 0

Answer:

B

Step-by-step explanation:

If we understand 2 properties of isosceles trapezoids, then we can solve for x and y easily.

First, the two sides, "2x-13" and "x-3" are equal, as shown also by red line.

So, we equate them and find x first. Shown below:

2x-13=x-3\\2x-x=-3+13\\x=10

Now, another property is:

Any lower base angle is supplementary to any upper base angle. That means the angle y is supplementary to "3y-4". Supplementary means that if we add up the two angles, it will be 180 degrees. So:

y+3y-4=180\\4y=180+4\\4y=184\\y=46

From the answer choices, answer choice B is right

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When 80% of a is added to the number, the result is 252. What is the number
wariber [46]
Use the equation .8x + x = 252
x is the number, and .8 is the decimal equivalent of 80%.

1.8x = 252

x = 140
6 0
3 years ago
Is (5,6.5) a solution to y= -1/2x + 9?
Jlenok [28]
6.5 = - 1/2(5) + 9

6.5 = - 2.5 + 9 which is the same as 6.5 = 9 - 2.5

6.5 = 6.5

So yes, this ordered pair IS a solution. 
3 0
3 years ago
(y-2)^2=-16(x-3) what is it
Dmitrij [34]

(y-2)² = -16(x-3)

y²-4y+4 = -16x+48

y²-4y = -16x + 44

Hope it helped!

5 0
3 years ago
I need help on this:(
Alex Ar [27]

Answer:

Not to sure if this is correct but I think it is 6: 1 : 18

pls msg me if you need explanation

3 0
3 years ago
6x-1 + 4X+21 = 50 solve for x
emmainna [20.7K]
Answer:

x=3


Explanation:

First what you do is move x to one side and the rest of the numbers to another while changing the sign from + to - or - to + like this
6x+4x= 1+-21+50

Then you do the equation on 1 side
6x+4x=30

And then the other but add them like x is not there
10x=30
Your final result should be
X=3
3 0
3 years ago
Read 2 more answers
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