Im tryna answer this but it don’t let me
Answer:
x = 6
Step-by-step explanation:
Given
3x - 11 = - 2x + 19 ( add 2x to both sides )
5x - 11 = 19 ( add 11 to both sides )
5x = 30 ( divide both sides by 5 )
x = 6
Answer:
51.3
Step-by-step explanation:
20-30: 100
30-40: 220-100 = 120
40-50: 350-220 = 130
50-60: 750-350 = 400
60-70: 950-750 = 200
70-80: 1000-950 = 50
Mean = sum(f × x) / sum(f)
= [25×100 + 35×120 + 45×130 + 55×400 + 65×200 + 75×50] ÷ 1000
= 51,300 ÷ 1000
= 51.3
Answer: 71.43 i think
Step-by-step explanation:
Using W = FS, here assume you are lifting with constant speed, then F is equal to gravity
F = 78.6 * 0.45 = 35.37 N
S = 0.3 * 4 = 1.2 m
So W = 35.37 * 1.2 = 42.44 J