Answer: using the discriminant to find the number of solutions to a quadratic equation b^2-4ac. positive discriminant indicates that the quadratic has <u>two distinct real number solutions.</u> The roots of a function are the x-intercepts. By definition, the y-coordinate of points lying on the x-axis is zero. Therefore, to find the roots of a quadratic function, we set f (x) = 0, and solve the equation, ax2 + bx + c = 0.
Step-by-step explanation:
can i have the answer choices
Answer:
Tax is C 4.12
Tip is E 15.00
total =94.10
Step-by-step explanation:
Tax = bill * tax rate
= 74.98 * 5.5%
= 74.98 * .055
= 4.1239
To the nearest cent = 4.12
Tip = bill * tip rate
= 74.98 * 20%
= 74.98 *.2
= 14.996
To the nearest cent = 15.00
The total bill is
Final = bill + tax+ tip
= 74.98 + 4.12+15
= 94.10
Answer:
43.50
Step-by-step explanation:
MULTIPLE THE 2 NUMBERS
Answer:
173
Step-by-step explanation:
Answer: The mechanic who worked 5 hours charged $45 per hour while the mechanic who worked for 15 hours charged $105 per hour.
Step-by-step explanation:
Let x be the rate of mechanic who worked 5 hours
And y, the rate of mechanic who worked 15 hours
Represent the question in an equation
x + y = 150.............. equation 1
5x + 15y = 1800........equation 2
x + y = 150, x = 150 -y
Substitute the value of x into equation 2 to get y
= 5 (150 -y) + 15y = 1800
Then open the bracket
750 - 5y + 15y = 1800
750 + 10y = 1800
10y = 1800 - 750
10y= 1050 (divide both sides by 10)
y = 1050/10
y = 105
Substitute the value of y into equation 1 to get the value of x
x + 105 = 150
x = 150 - 105
x = 45
Therefore, the mechanic who worked 5 hours charged $45 per hour while the mechanic who worked for 15 hours charged $105 per hour.
I hope this is clear, mark as brainliest please
