Simplify the expression below. 3x^2 - 5x^2 + 4x^2 (Please explain how you get the answer)
1 answer:
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Answer:
Part a)
Part b)
Step-by-step explanation:
Part a) Create a linear equation to represent this situation
Let
x -----> the number of years
y ----> the height in inches
we have the points
(020) ----> at birth the height was 20 inches
(8,48) ---> 8th birthday the height was 48 inches
step 1
Find the linear equation in slope intercept form
where
m is the slope
b is the y-coordinate of the y-intercept
<em>Find the slope m</em>
<em>Find the value of b</em>
----> the point (0,20) is the y-intercept
substitute
Part b) According to your equation, how tall will you be at age 20?
For x=20 years
substitute the value of x in the linear equation and solve for y