Which of the following equations have exactly one solution? Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
19x+18=-19x+1819x+18=−19x+1819, x, plus, 18, equals, minus, 19, x, plus, 18

(Choice B)
B
19x-18=-19x+1819x−18=−19x+1819, x, minus, 18, equals, minus, 19, x, plus, 18

(Choice C)
C
-19x-18=-19x+18−19x−18=−19x+18minus , 19, x, minus, 18, equals, minus, 19, x, plus, 18

(Choice D)
D
-19x+18=-19x+18−19x+18=−19x+18

Which expression is equivalent to 5r6141 2r+st6

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11