Answer:

Step-by-step explanation:
you add the exponents
4 + (- 5) + (- 2) = 4 - 5 - 2 = -3

Answer:
(6,2)
Step-by-step explanation:
i used elimination method
The first number - x
The second number is 7 more than the first - x+7
The third number is 2 more than 4 times the second - 4(x+7)+2
The sum of the numbers is 85.

The numbers are
8, 15 and
62.
Answer:
10
Step-by-step explanation:
Use Pythagorean theorem,
Base² + altitude²= hypotenuse²
8² + altitude² = (2√41)²
64 + altitude² = 2²*(√41)² {(√41)² = √41*√41 = 41}
64 +altitude² = 4 * 41
64 +altitude² = 164
altitude² = 164 - 64
altitude² = 100
altitude = √100 = 10
First solve the bracket
3+2(4)
Then multiply with 2
3+2*4
3+8
Then add 3 and 8
11