What is the value of a in the equation 5a – 10b = 45, when b = 3?

5a – 10b = 45

Substitute b = 3 into the equation

5a – 10(3) = 45

5a - 30 = 45

5a = 75

a = 15

a = 15

If b = 3 you substitute al the b's on the equation by 3:

5a - 10(3) = 45 - you substitute b for 3

5a - 30 = 45 - you do 10 * 3

5a = 45 + 30 - you move 30 to the right side of the equation

5a = 75 - you do 45 + 30

a = - you take 5 to the right side of the equation

a = 15

Hope it helped,

Happy homework/ study/ exam!

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation:

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v