HELP DO THESE 4 for 100 points and BRAINLIEST asap pls show all your work!

(10)x= -7(i)

3x-5y= -16(ii)

put value of x in (ii) then we have:-

3x-5y= -16

3(-7)-5y= -16

-21-5y= -16

-5y = -16+21

-5y = 5

y = 5/-5= -1

y= -1

(11)

Step-by-step explanation:

Add up:

Find y:

Add up:

Find y:

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

21.4 i did it already for s1

step-by-step explanation: