Which sets of numbers are closed under addition? choose all answers that are correct. a. {0, 2, 5, 8}
b. even integers
c. rational numbers
d. {0}

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

3

step-by-step explanation:

because where the point where the 2 lines intersect is (3,-1) the x value is 3

answer: i dont know but if you try hard you will get it right : )

step-by-step explanation: