Please help me with this question
please help me with this question - 1

Answers

Answer 1
Answer: using the Pythagorean theorem we can tell if it is a right triangle.
 the formula is a^2 + b^2 = c^2
a =9
b =12
c=15

9^2 + 12^2 = 81 + 144 = 225

15^2 = 225

225 = 225 so it is a right triangle

 the answer is TRUE



Answer 2
Answer: if right triangle then c^2 = a^2 + b^2

c^2 = 25^2 = 625
a^2 + b^2 = 9^2 + 12^2 = 81 + 144 = 225

SO
c^2 = a^2 + b^2
225 = 225

Conclusion: Yes, triangle LMN is a right triangle.

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What is the percent of 0.25% out of 50

Answers

It would be 0.125 because by converting percent to a decimal you must first multiply 0.0025 x 50.

Hope that helps

Please help quick, need answers for 21, 22, and 23, with a step by step explanation.

Answers

Answer:

21) $90    22) $144     23) $240.5

Step-by-step explanation:

21)  Cost to Store(CTS): 75    Markup(M): 20

      Turn 20% into 0.20

      Multiply the CTS, 75, by 0.20 to get 15

      Add 15 and 75 together to get 90


22) CTS: 90    M:60

     Turn 60% into 0.60

     Multiply the CTS, 90, to 0.60 to get 54

     Add 54 and 90 together to get 144


23) CTS: 130    M:85

      Turn 85 into 0.85

      Multiply the CTS, 130, to 0.85 to get 110.5

      Add 110.5 and 130 together to get 240.5

A movie theater holds 345 people. The theater is filled for every show. How many people will have been in the theater after 23 showings of a movie?

Answers

All you do is multiply the amount of people by the amount of shows.

345 x 23 = 7935

7935 people will have been in the theater after 23 showings of a movie.
I know that 345x23=7,935

3x+2y=38 x=3y-2 substitution

Answers

Step-by-step explanation:

Replace the sec equation on the first one... Find the value of y first.. And then name the value of y as the third equation.. Replace the third equation on the sec one to get the value of x

taylor cut 1/5 sheet of construction paper for an arts and craft project.Write 1/5 as an equivalent fraction with the denominators

Answers

An equivalent fraction would be 2/10
2/10 is the answer i think ..

Round 25.78 to the nearest whole number

Answers

The answer is 26 because you would look at the seven to see what to round it to and since seven is greater than five, you round the number to 26.