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Sunny_sXe [5.5K]
4 years ago
6

Please help and answer correctly

Mathematics
1 answer:
astra-53 [7]4 years ago
5 0
Set the equations equal to each other. Then, subtract 10x from 10x and 10x from 13x. You now have -25=3x-55. Add 55 to both sides. You now have 30=3x. Divide 3 from both sides. X equals 10. Now find y. Take one of the equations and substitute x in. Do y=10(10)-25. Your y is 75.
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PLEASE HELP!!! I don't get this question at all!!
Luda [366]
88 degrees is the answer. You would start by setting up the equation as (5x+7)+(8x+8)+(3x+5)=180 because all angles of a triangle have a sum of 180 degrees. From there you combine like terms which would leave the answer of being 16x+20=180 then you subtract the 20 from 180 to get x by itself. Then that would leave you with 16x=160 then you divide both sides by 16 to get x=10. From there you plug 16 into the x in the planetarium equation which is 8(10)+8 which equals 88 degrees
8 0
3 years ago
Which is a composite number? 2,5,11, or 9
andrew11 [14]

Answer:

9

Step-by-step explanation:

A composite number is a positive integer. which is not prime.  The first few composite numbers (sometimes called "composites" for short) are 4, 6, 8, 9, 10, 12, 14, 15, 16, ...

7 0
3 years ago
The sum of the page numbers on the facing pages of a book is 85. what are the page numbers
Triss [41]

The correct answer is 42 pages

3 0
4 years ago
Read 2 more answers
Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!
Cerrena [4.2K]

Answer:

a=-16.00 b=48 c=64

8 0
3 years ago
Sarah walks 20 feet away from her house and places a mirror on the ground. She backs 5 feet away from the mirror so that she can
Vikki [24]

Answer:

16 feet

Step-by-step explanation:

As said in the problem statement, the angles between the top of the house, the mirror, and the ground and between Sarah's eyes, the mirror, and the ground are congruent.

We also know that Sarah and the house are perpendicular to the ground.

So if we draw a triangle from the top of the house, to the mirror, to the bottom of the house, and another triangle from Sarah's eyes, to the mirror, to Sarah's feet, we get two triangles that have the same angles.  Therefore, the triangles are similar, and we can write a proportion:

4 / 5 = h / 20

h = 16

The house is 16 feet tall.

4 0
3 years ago
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