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3 years ago

How do you determine if a triangle is a right triangle given three points? problems and solutions?

1 answer:

7 0

Find the slopes of the three lines, if you have a perpendicular line from those, it is a right triangle.
Example:
If you have a line with a slope of 2/3, and one the others have a slope of -3/2, they are perpendicular and you have a right triangle

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Distribute and combine like terms.<br> 7(4a+3b-6)-3(3a-2b+4)

andrew11 [14]

Answer:

19a+27b-54

Step-by-step explanation:

First distribute 7 into the first equation. (4a+3b-6) Multiply each coefficient and the constant by 7.

28a+21b-42

Then do the same for -3 and (3a-2b+4).

-9a+6b-12

Rewrite the equation 28a+21b-42-9a+6b-12.

Combine like terms: 19a+27b-54

5 0

4 years ago

PLEEAAAASE help <br> if a+1 is divisible by 3 prove that 4+7a is divisible by 3 too

Lemur [1.5K]

Answer:

Given a is 5

Step-by-step explanation:

I. Given a is 5

= a + 1

= 5 + 1

= 6

6 is divisible by 3 => true

II. Find 4 + 7a value

= 4 + 7(5)

= 4 + 35

= 39

39 is divisible by 3 => true

III. Prove by

6 ÷ 3 = 3

39 ÷ 3 = 13

Hope that help :)

3 0

3 years ago

A person came to work at 7:30am went out at 11:45am had lunch came in at 12:30pm and left at 5:15pm. How many hours did this per

Julli [10]

Answer:

9 hours

Step-by-step explanation:

if they came in at 7:30 a.m and leaves at 11:45 a.m they have been there for 4 hours and 15 minutes.

If they arrive at 12:30 p.m and leave at 5:15 p.m they have been there for 4 hours and 45 minutes

so in total they have been there for 9 hours

3 0

3 years ago

A customer paid $83.97 to rent a truck for 1 day. The rental company charged $34.99 per day and $0.79 per mile driven. Which equ

Nezavi [6.7K]

$\frac{83.97 - 34.99}{0.79} = m$

5 0

3 years ago

Erika calculated that she would spend $115 on school supplies this year. She actually spent $82.50 on school supplies. What is E

DerKrebs [107]

Answer:

Step-by-step explanation:

Percentage error is calculated by

Percentage error = (estimate-real)/real*100%=(115-82.5)/82.5*100%=28.26%

An over-estimate gives a positive error percent, and an underestimate gives a negative error.

Also, dividing by the real value makes it possible to have more than 100% error.

For example, if real cost is $50, and estimated cost is $150, then error percent is (150-50)/50*100%=200%!

C: 39.4%

Step-by-step explanation:

The formula to calculate the percent error is given by :-

Given: The estimated amount = $115

The actual amount = $ 82.50

Now, the percent of error will be given by :-

4 0

3 years ago