Given:
The lengths of the sides of a triangle are 6, 11, 16.
To find:
Whether the given triangles is a right angle triangle or not.
Solution:
Pythagoras theorem:
A triangle is a right angle triangle if the sum of squares of two smaller sides is equal to the square of the largest sides.
In the given triangle the length of the largest side is 16.
Square of the largest sides is:
Sum of the squares of the two smaller sides is:
Since 
, therefore the given triangle is not a right angle triangle.
30 hours. Just multiply 10 by 15 to get 150 and then 2 times 15 is 30.
Since they're both negative the answer is 7
Answer:
72 houses.
Step-by-step explanation:
We are told that a postal worker can deliver the mail to 18 houses in 15 minutes.
Let us find numbers of mails delivered by postal worker per minute.
Since we know that 1 hour equals 60 minutes, so we will multiply 1.2 by 60 to find the number mails postal worker will deliver in 1 hour.
Therefore, the postal worker will be able to deliver mails to 72 houses in 1 hour.
Step-by-step explanation:
1. +2-(+3) also is equal to 2-3. answer is -1
2. +11+(-10) also is equal to 11-10. answer is 1
3. 3+(-5) is also equal to 3-5. answer is -2
4. 22-21= 1
5. -8-(-44) is also equal to -8+44. answer is 36
6. -12+6+3 answer is -3
7. 16+12 answer is 28
8. -36+36=0
9. -4 x 10= -40
10. -1 x -1= 1
11. 7 x -7= -49
12. -4/4= -1
13. -7 x -5=35
14. -10 x 8 = -80
15. -2 x -7 = 14
Key tips to remember
a negative+ a negative also known as a double negative is always added.
negative * negative always equals positive
negative * positive always equals negative
