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I really need help with topic. I don't get it at ALL. this is one of the questions used in class:- y=2x-1. y=x2 (Both x and y equal to 1 I just don't understand how or why) please explain

4(8-x)=40

if 2x-3x(x+4)=-5 then x=?

x2 + 2xy = 5 x + y = 3

(W)(w-5)-w-22=(w+5)(w-5) and solving for w

How would you solve x^ + y^ = 25 y - 3x = 13

Solve for x

sin theta = (under root 3 + 1) divided by 2 times under root 2 cos theta = (under root 3 - 1) divided by 2 times under root 2 Find the value of theta. Please look at the shared image.

How do you solve for x

119x = 9

Question: points A (-1,-2),B(7,2) and C (k, 4), where K is a constant, are the vertices of triangle ABC. Angle ABC is a right angle. Calculate the value of K?