What coordinate plane shows the graph of 3x+y>9 ?
1 answer:
Answer:
(d) see attached
Step-by-step explanation:
All of the answer choices show shading above a dashed line, so we need to look a little closer at the equation of the boundary line. Written as an equation, it is ...
3x +y = 9
When you set each variable to zero and solve for the other, you find the intercepts to be ...
y = 0, x-intercept: 3x = 9 ⇒ x = 3
x = 0, y-intercept: y = 9
The only graph that has x- and y-intercepts matching these values is the one attached.
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Answer: C
Step-by-step explanation:
Simplify to 4x^2 + 12x + 5 = 0 so that all the terms are on one side.
Do a part of the quadratic formula to see.
You only need to do the part. If it is negative, that means there are irrational solutions. If it is positive, it has two solutions. If it is 0, it has 1 solution.
It is positive so it has two solutions.