sis212
08.11.2019 •
Mathematics
Do question 4 and explain how you got the answer . the question is on the image
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Ответ:
y+50−50=200−50y=150
y=150
Ответ:
x=y+50
if x + 2y = 200, then let's solve it for x...
x = 200 - 2y (subtracted 2y from both sides)
Now we have two "x +" equations"
x = y + 50
x = 200 - 2y
If x equals two things, those two things equal each other (transitive property)
y + 50 = 200 - 2y
3y + 50 = 200 (added 2y to both sides)
3y = 150 (subtracted 50 from both sides)
y = 50.
if y = 50, sub 50 back in for y into either of the two original equations (how about both to check?)
x + 2(50) = 200
x + 100 = 200
x = 100
x = 50 + 50
x = 100
it's the same, so x = 100, y = 50
The lines cross at (100, 50)
hopes this helps :) :D :)
Ответ:
See explanation below.
Step-by-step explanation:
Part A:
(i). They both correct because they could have a third degree polynomial that crosses the x-axis 3 times.
(ii). To find the zero's of the first one, set function equal to zero and use zero factor principle given as:
So, we have: