B. Write the equation in slope intercept form. (y=mx + b). Remember, m is the slope, b is the y intercept (where x=0).
1 answer:
Answer:
y=5x+10
Step-by-step explanation:
Use two points from the table: (1, 15) and (2, 20) to find m (m=)
m=
m=5
Use another point from the table as x and y: (25, 3) in the equation y=mx+b (we just found m=5). Solve for b
y=mx+b
25=5(3)+b
10=b
Therefore, knowing m and b the equation in slope intercept form is:
y=5x+10
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Answer:
x = - , x = 3
Step-by-step explanation:
Given
(4x - 5)² = 49 ( take the square root of both sides )
4x - 5 = ± = ± 7 ( add 5 to both sides )
4x = 5 ± 7, thus
4x = 5 - 7 = - 2 ( divide both sides by 4 )
x = = -
or
4x = 5 + 7 = 12 ( divide both sides by 4 )
x = 3
As a check
Substitute these values into the left side of the equation and if equal to the right side then they are the solutions.
x = -
left side = (- 2 - 5)² = (- 7)² = 49 = right side ⇒ solution
x = 3
left side = (12 - 5)² = 7² = 49 = right side ⇒ solution