Answer:
3x-12 is the simplififed answer
Step-by-step explanation:
the equation is almost already simplified. when you combine -8 and -4, which are like terms, you get 3x-12. because there are no more lie temrs in the equation, it can not be simplififed any further.
Answer:
7.5
Step-by-step explanation:
-7x > -42. So you divide on both sides by -7 and that gives you x > 6
Im pretty sure it can. 20 +20 = 40. if that helps...
Answer:
8 Joule
Step-by-step explanation:
Mass of block = 2 kg
Displacement = x = 800 mm = 0.8 m
Spring constant = k = 25 N/m
Potential Energy of a spring
Work done = Difference in Potential Energy
Work Done = Δ P.E.

⇒P.E. = 0.5×25×0.8²
⇒P.E. = 8 Nm = 8 Joule
Here already the spring constant and displacement is given so the mass will not be used while calculating the potential energy.