The resistance of a material is given by the formula R = ρ*
. Where l is the length and S is the area of the surface calculated with the radius, and ρ is the coefficient that indicates the resistance of a material.
If you keep the lenght and radius, and change the material, ρ will still change and the final resistance (R) will change.
with "k" being the "constant of variation"
so. hmm in this case is "w" inversely varying to the square of the distance or d²
thus
solve for "k", to see what the constant of variation is
and plug it back in
now.. .to find her weight when she's 144miles above the surface, well
that's just
and since you already know what "k" is, just divide and simplify away, to get "w"
Hi there Summer 112!
2.5 divided by 4.75 is 0.526315789473684. Hope this helps!
Answer:
B. divide both sides of the bottom equation by 2
Step-by-step explanation
If opposite means additive inverse, then none of the answers is correct
The given system of equations is
4x+2y=4
12x+y=22
The coefficient of y in the top equation is 2 and the coefficient of y in the bottom equation is 1.
One way to make the coefficient of y have opposite sign is to multiply the bottom equation by -2 to get:
4x+2y=4
-24x-2y=-44
Or we divide the top equation by -2
-2x-y=-2
12x+y=22
If opposite means, multiplicative inverse, then dividing through both sides of the bottom equation by 2 gives:
4x +2y=4
6x + ½y=11
Hence the second choice is correct.