On the first day of the year, you have $700 in your bank account. You spend $35 per week. Your friend starts the year with $450 in his bank account. He saves $15 per week.

Solve the equation 700 – 35w = 450 + 15w to find out how many weeks, w, it will take for you and your friend have the same amount of money in your accounts.

5 weeks

Step-by-step explanation:

700 – 35w = 450 + 15w

700 - 450 -35W + 35W = 450 -450 + 15W + 35W

250 = 50W

w = 5

To find the value of "w", you need to isolate/get the variable "w" by itself in the equation:

700 - 35w = 450 + 15w      Add 35w on both sides to get "w" on one side of the equation

700 - 35w + 35w = 450 + 15w + 35w

700 = 450 + 50w        Subtract 450 on both sides

700 - 450 = 450 - 450 + 50w

250 = 50w      Divide 50 on both sides to get "w" by itself

5 = w           It will take 5 weeks for you and your friend to have the same amount of money in your accounts

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

4

step-by-step explanation: