Answer: Formula= x^2 - 2x - 8
Roots=(-2 , 0) (4 , 0)
Step-by-step explanation:
1.) find the equation (the formula is Ax^2 + Bx + C, so plug it in)
2.)Plug it into your calculator's Y= X^2 - 2X - 8 (if you have one)
3.)Press 2nd, Calc, 2
4.)Go to the X Intersect , it will say Left Bound at the bottom left corner
5.)Press the left arrow about 3 or 4 times, hit enter
6.) It will now say Right Bound in the same corner go back to the X intersect, now press the right arrow 3 or 4 times
Repeat steps 3 to 6 for the other X intersect.
Answer:
7 people purchase the items and they used 53 coins
Step-by-step explanation:
Let x represent the number of people.
Let y be the number of coins needed to purchase the items.
If each person pays 8 coins, the surplus is 3 coins. This is illustrated below:
8x = y + 3 (1)
if each person gives 7 coins, the deficiency is 4 coins. This is illustrated below:
7x = y — 4 (2)
Solving by elimination method: subtract equation(2) from equation (1). This is illustrated below:
8x = y + 3 (1)
— (7x = y — 4) (2)
x = 7.
Next, Substituting the value of x into any of the equation to obtain y. In this case I will be using equation 1 as illustrated below:
8x = y + 3 (1)
8(7) = y + 3
56 = y + 3
Collect like terms
y = 56 — 3
y = 53
Therefore, 7 people purchase the items and they used 53 coins
Answer:
C. (3,-3)
Step-by-step explanation:
5x + 3y = 6
5(3) + 3(-3) = 6
15 + (-9) = 6
therefore point lies on the line
Answer:
2 hours * (47 miles / hour) = 94 miles
multiply the value in miles per hour by the conversion factor '1.609344'.
So, 2.2 miles per hour = 2.2 × 1.609344 = 3.5405568 kilometers per hour.
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
To find the slope of the graphed line, you take two points. I have chosen (0, 4) and (8, 0)
The formula of a slope is (y value of second point 
value of first point) divided by (x value of second point 
value of first point):
------------------------------------------------------------------------
The slope for a perpendicular line is 2.
