Which expression could be used to solve this problem? bart practices piano every day. first he practices songs for 20 minutes. then he practices scales for 15 minutes. how much time does bart practice piano in 3 days? a. 3 × (20 – 15) b. 20 × (15 + 3) c. 3 × (20 + 15) d. 20 × (15 – 3)

answer:

given the linear inequality :

add 2y to both sides we get;

simplify:

add 12 to both sides of an equation;

simplify:

divide both sides by 2 we get;

or

the related equation for the inequality equation [1] is;

y-intercepts defined as the graph crosses the y-axis.

substitute x =0 in [2] to solve for y;

y = 6

x-intercepts defined as the graph crosses the x-axis.

substitute value y = 0 to solve for x;

subtract 6 from both sides we get

multiply both sides by 2 we get;

or

x = -12

now, plot these point (0, 6) and (-12, 0) on graph as shown below and shade the graph below the solid line.

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24