The answer is 8/3 or 2 2/3 for the first one.
X + y = 40.....multiply by -4
4x + 6y = 180
-------------------
-4x - 4y = -160 (result of multiplying by -4)
4x + 6y = 180
------------------add
2y = 20
y = 20/2
y = 10 <===
x = 30
Answer:
Parallel
Step-by-step explanation:
in a Standard from equation, Ax+By=C
slope=-A/B
The slope of first line is -3/-1=3
The slope of second line is -6/-2=3
Same slopes but different C values mean they r parallel.
Answer:
2 2/5
Step-by-step explanation:
Answer:
Quadratic, because the height increases and then decreases.
Step-by-step explanation:
In an exponential function, the graph will either increase or decrease over the entire domain. It does not change direction.
We can see from the table that the heights increase and then decrease; this means it cannot be an exponential function.
A quadratic function has a graph that is u-shaped. It will start out either increasing or decreasing, and then after the maximum or minimum is reached, it changes direction.
We can see from the table that this is what the heights do; this means it is a quadratic function.
