Y varies directly with x m eans
y=kx where k is constant
y=40
x=16
find k
40=k16
divide both sides by 16
5/2=k
y=5/2x
y=-5 find x
-5=5/2x
times 2/5 both sides to cancle fraciton (5/2 times 2/5=10/10=1)
-10/5=x
-2=x
x=-2
All real numbers except -1
{xl all real numbers, x ≠ -1}<span>
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Let X be the variable used to represent the expression of the total number of books that Mario has read.
We used 4X to represent "four times the number of books". Then we add -2 to interpret the words "for two less than".
Therefore, we have an expression of 4X-2 for the total number of books that Mario has read.
Substitute x = 3 in any given equations. I will do in y = - x + 1
Therefore the answer is (3,-2)
Answer:
+- 1/4,1/2,1,2,4
5 solutions.
Step-by-step explanation:
so first we have to do this using the theorum we find all the divors of -2
so +-2, +-1/ +-2,+-1,+-4 so there would be 5 solutions.
+- 1/4,1/2,1,2,4
if my answer helps please mark as brainliest.
