Can someone please explain this to me please? Will give if you actually answer the question.

50 weeks

Step-by-step explanation: If John already has $100 in his bank account and needs $850. You subtract $100 from $850 and get $750. To get how many weeks he needs to get 850, you divide 750 by 15 since john is making 15 per week. 750 divided by 15 equals 50 weeks. So the answer will be 50 weeks till he gets $850.

Step-by-step explanation:

        850 = 100 + 15x

850 - 100 = 100 + 15x - 100

         750 = 15x

              x = 750/15

              x = 50 weeks

correct

step-by-step explanation:

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3