Ineed . anyone? 1. david would like to make a 280 lb. flour mixture that is 8% plain flour. he has bread flour that is 14% plain and cake flour that is 7% plain let b represent the number of pounds of bread flour needed to make the new mixture and let c represent the number of pounds cake flour needed (a) what is the system that models this situation? (b) how many pounds of bread flour and cake flour will david need? show your work and label your answers correctly hint: remember to change the percentages into decimals. i would really appreiate the .

(a) The system that models the situation:   and

(b) David needs 40 pounds of bread flour and 240 pounds of cake flour.

Step-by-step explanation:

The amount of flour mixture is 280 lb. that is 8% plain flour.

So, the amount of plain flour in the mixture will be:   lb.

The number of pounds of bread flour and cake flour needed to make the new mixture are and respectively.

So, the first equation will be:  

The bread flour has 14% plain flour and the cake flour has 7% plain flour.

Thus, the amount of plain flour in bread flour lb. and the amount of plain flour in cake flour lb.

So, the second equation will be:  

From equation (1), we will get:  

Now substituting this into equation (2) in place of ........

Plugging this into equation (1), we will get.....

So, David needs 40 pounds of bread flour and 240 pounds of cake flour.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: