What is the difference of (-3.4x+4.7)-(3+2.9x)?

A. -0.5x+1.7
B. -6.3x-1.7
C. -0.5x-1.7
D. -6.3x+1.7

(PLEASE HURRY AND ANSWER THIS!)

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Ke’ajah has a coupon for 1/3 off the regular price, t, of a tent. which expression represents the price of the tent using the coupon? select the two correct expressions. a. 1/3t b. 2/3t c. t - 1/3 d. t - 2/3 e. t - 1/3t f. t - 2/3t

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?