Which expression is not equivalent to 1/343 a 7^4 * 7^-7 b 7^7 * 7^-10 c 7^-2 * 7^-5 d 7^-5 * 7^2

c is not equivalent to 1/343

(7−2)(7−5)

=7−2*7−5

=(1/7*7)*(1/7*7*7*7*7)

=1/7*7*7*7*7*7*7

=1/77

=1/823543

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer