(01.02 mc)maya is showing her work in simplifying (5.2 − 4.5) − 5.5 + 4.8. identify any error in her work or reasoning. step 1: (5.2 − 4.5) − 5.5 + 4.8 step 2: 5.2 + (− 4.5 − 5.5) + 4.8 (identity property) step 3: 5.2 − 10 + 4.8 step 4: 5.2 + 4.8 − 10 (commutative property) step 5: 10 − 10 = 0

C.

she wrote identity instead of associative in step 2

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

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