Five times the sum of a number and 27 is greater than or equal to six times the sum of that number and 26. what is the solution
set of this problem?
(-09-21)
• (-00,-21]
[-21, +00)
(21,400)

( -∞ , - 21 )

Step-by-step explanation:

Let the number be x , so from the question , we have

5(x+27) ≥ 6 ( x + 26 )

expanding , we have

5x + 135 ≥ 6x + 156

5x - 6x ≥ 156 - 135

- x ≥ 21

Therefore :

x ≤ - 21

So , the numbers less or equal to -21 are -21 ,-22 , -23 ...

so the solution set is ( - ∞ , 21 )

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