Evaluate each expression. 1. 8 squared 2
2. 3 squared 2
3. 5 squared 3
4. 3 squared 3
5. (5+4)7
6. (9 – 2). 3
7.4 + 6.3
8. 12 + 2 • 2
9. (3+5) • 5+1
10.9 + 4(3 + 1)
11. 30 - 5.4 + 2
12. 10 + 2.6 +4
13. 14 = 7.5 – 32
14.4[30 - (10 - 2) • 3]
15.5+ [30 – (6 - 1)?]
16. 2[12 + (5 - 2)]

41*67/2=1373.5

step-by-step explanation:

i just used a calculator

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.