Write an algebraic expression to represent the phrase "the difference between tow times b and eleven"

Explanation

b = some unknown number (think of it as a placeholder or a box to put the number inside)

2*b = two times the unknown number b

2*b - 11 = difference of two times b and eleven

side note: 2*b is the same as 2b. The multiplication symbol is often dropped to save space.

step-by-step explanation:

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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