Describe several real world situations can be modeled by equations of the form Y equals MX plus be or Y equals MX explain how the latter equation represents a proportional relationship

The linear equation represents y = mx + b describes several real world situations such as

Step-by-step explanation:

Linear equations  y = mx + b.  

m is your rate of change.

b is your constant. This is the initial value of y. The value of y when x is 0.

Finally, y is the thing that depends on x.

Oh right, examples:  

total cost = 25(cartridges I buy) + 100 or y = 25x + 100

amount left on card = -$1(songs bought) + 100 or y = -x +100

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

7

step-by-step explanation: