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Lapatulllka [165]
2 years ago
11

A​ student's cost for last semester at her community college was ​$2000. She spent ​$280 of that on books. What percent of last​

semester's college costs was spent on​ books?
Mathematics
1 answer:
Usimov [2.4K]2 years ago
8 0

Answer:

14%

Step-by-step explanation:

A way I usually do it is with a fraction setup.

280/2000 = ?/100

multiply 280 by 100, and you get 28000. divide this by 2000, and you get 14!

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A triangle can have at most ________ right angle.
andrey2020 [161]
A triangle can only have at most one right angle.

Here's a proof that shows why this is so:

We know that the sum of all interior angles of a triangle must add up to 180.
Let's say the interior angles are A, B, and C

A + B + C = 180

Let's show that having two right angles is impossible

Let A = B = 90

90 + 90 + C = 180

180 + C = 180

Subtract 180 from both sides

C = 0

We cannot have an angle with 0 degrees in a triangle. Thus, it is impossible to have 2 right angles in a triangle.

Let's try to show that it's impossible to have 3 right angles

Let A = B = C = 90

90 + 90 + 90 = 180 ?

270 ≠ 180

Thus it's impossible to have 3 right angles as well.

Let's show that is possible to have 1 right angle

Let A = 90

90 + B + C = 180

Subtract both sides by 90

B + C = 90

There are values of B and C that will make this true. Thus, a triangle can have at most one right angle.

Have an awesome day! :)
3 0
3 years ago
two trains leave the station on time.one train travels north at 60mph .the other train travels south at 50mph.how many miles wil
ozzi
It doesn't matter how far apart just so you know and you answered it 3330 miles apart because you multiply 60 by 50
8 0
3 years ago
80.8=8(m+2.8) what is this answer
Aleonysh [2.5K]
The answer is 7.3, If you use the order of operations, When you divide 58.4 by 8 you get 7.3
8 0
3 years ago
Can someone plz help me I’m being timed hurry!!!!!!!!!!!!
rosijanka [135]

Answer:

...

Step-by-step explanation:

14, 18, 20

6 0
3 years ago
Read 2 more answers
A solid gold ingot has a volume of 200 cm3 and a mass of 3.9 kg.
Contact [7]

Step-by-step explanation:

convert 3.9 kg to grams

3.9×1000=3900 g

density = mass/ volume

= 3900/ 200

=19.5 g/cm3

7 0
2 years ago
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