There is a special kind of substitution which some books call it by comparison.
When the two equations are both
y=some function of x
y=some other function of x, then
we can substitute the second equation into the first giving
some function of x = some other function of x and start solving.
For example,
<span>y = –2x + 8
y = x – 1
substitute second into first
x-1=-2x+8
isolate x on left,
3x=9
x=3
second step is to substitute x=3 into second equation to get
y=x-1=3-1=2
Therefore the solution is (3,2)</span>
Answer:
.70/100 ×120 is 84 .which is temporary so to find permanent u subtract 120 from 84 which is 36
Step-by-step explanation:
Answer:
80 ... ..........
Step-by-step explanation:
i got 100 on test
Answer:
This is a linear function so we must first find the rise than run of the table. -8 to -4 is a run of 4
-3 to 0 is a rise of 3
Next we divide rise/run so 3/4 and now we know that the slope is 3/4.
This is a linear function the school or website you got this question just did not give x=0 and y=3 to mess with you the students.
Step-by-step explanation:
Since the figure has both sides congruent and 90 degree angle, the figure is a square. That means that the angle of the diagonals are 90 degrees so m∠1=90. This means 90=3y+6 so y is 28
