And how can i show the work?

so i substituted the x with 3 and 5, got two decimals (27.16 and 16.10) but my teacher says it's not correct, but all she wrote down on my paper was ' subtract now ' and i've subtracted all that i could think of and i still didn't get the answer. is much appreciated!

Find the value of the variable and the length of each secant segment.

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Examine the paragraph proof. which theorem does it offer proof for? prove jnm – nmi according to the given information in the image. jk | hi while jnm and lnk are vertical angles. jnm and lnk are congruent by the vertical angles theorem. because lnk and nmi are corresponding angles, they are congruent according to the corresponding angles theorem. finally, jnm is congruent to nmi by the transitive property of equality alternate interior angles theorem gorresponding angle theorem vertical angle theorem o same side interior angles theorem