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Crazy boy [7]
3 years ago
15

What is the value of y? Enter your answer in the box.

Mathematics
1 answer:
iris [78.8K]3 years ago
3 0

Answer:

5

Explanation:

So for these, a triangle always equals 180 so you just have to set it up where you add all the sides together to equal 180. Also because it is an isosceles triangle, it means that the two bottom angles are equal so start by setting them equal and solving for x:

75 = 3x

So divide both sides by 3:

25 = x

Now you really didn't have to solve for x because you already know that it equals 75, so you could just said x doesn't matter and just treat it like a 75, but I explained it just in case.

So now that you have your base angles which added together equal 150 lets set it all equal to 180:

4y + 10 + 150 = 180

Now I will simplify this:

4y + 160 = 180

subtract 160 from both sides:

4y = 20

now divide both sides by 4:

y = 5

hope this helps!

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A triangle has a perimeter of 10a + 3b + 12 and has sides of length 3a + 8 and 5a + b what is the length of the third side ?
RideAnS [48]

Answer:

  2a +2b +4

Step-by-step explanation:

The perimeter is the sum of the lengths of the three sides. If x represents the length of the third side, then ...

  (3a +8) +(5a +b) +x = (10a +3b +12)

Subtracting from the equation everything on the left side that is not x, we get ...

  x = (10a +3b +12) -(3a +8) -(5a +b)

  = a(10 -3 -5) +b(3 -1) +(12 -8)

  = 2a +2b +4

The length of the third side is 2a +2b +4.

5 0
3 years ago
Anyone know the answer?
jonny [76]
Answer is 4 so C for you. I just did this with my brother! Hope this helped.
8 0
3 years ago
Read 2 more answers
4.5 is 8.2 what is the sum
antiseptic1488 [7]

Answer:

12.7

Step-by-step explanation:

4 0
3 years ago
The yearbook club had a meeting. The meeting had 24 people, which is three-fourths of the club. How many people are in the club?
Leto [7]

Answer:

32

Brainiest plz?  :)

8 0
3 years ago
I must also show my work, but I do not know how to do this problem
Vinvika [58]

Answer:

x = 10

Step-by-step explanation:

We know that the sum of angles in a triangle is equal to 180 degrees;

This means that

71+50+(6x-1) = 180; now that you have an algebraic expression, you can solve for x.

71+49+6x=180

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6x = 60

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6 0
2 years ago
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