Answer:
y=4x+30
In 7 months, the total cost will be $58.
Step-by-step explanation:
Since the monthly fee is 4, it's going to be the constant, or the slope. And 30 is a one time fee, so it's the y-intercept.
How many Months?
58-30=28
28/4=7
So in 7 months.
Answer:
y = 2
Step-by-step explanation:
use slope formula:
(4 - y) / (3 - 10) = -2/7
4-y / -7 = -2 /7
cross-multiply:
7(4 - y) = (-7)(-2)
28 - 7y = 14
-7y = -14
y = 2
Basically either subsitute or solve
I will simplify to make easier work
so PEMDAS
Parenthasees
Exponents
multiply or divide whichever comes first
add or subtract whichever comes first
9 times 8=72
I will assume that x2=x^2 or x squared so left is simplified
x^3+x^2 so
72-2x+x^2<u>></u>x^3+x^2
subtract x^2 from both sides since they cancel each other out
72-2x <u>></u> x^3
add 2x to both sides
72 <u>></u> x^3+2x
factor
72 <u>></u> x(x^2+2)
now subsitute 7,6,5,4
if x=4 then
4(4^2+2)=4(16+2)=4(18)=72
72 <u>></u> 72
true
since all the other numbers are smaller, the only sentence that will work is 7 or A
the answer is A 7
Answer:
The two real solutions are and
Step-by-step explanation:
The equation is a quadratic function of the form that can be solved by using the Quadratic Formula.
The plus and minus mean that the equation has two solution.
In order to identify is the equation has two real solutions we use the discriminant equation . Depending of the result we got:
1. If the discriminant is positive, we get two real solutions.
2. if the discriminant is negative, we get complex solutions.
3. If the discriminant is zero, we get just one solution.
Solution:
The equation has a=9, b=0, and c=-4
Using the discriminant equation to know if the quadratic equation has two real solutions:
The discriminant is positive which mean we get two real solutions.
Using the Quadratic Formula
then
and
To solve this problem, we should set up an equation, letting the unknown value of miles that Ahmad drove be represented by the variable x. We can have our total price on one side of the equation, set equal to the base fee plus the number of miles Ahmad drove multiplied by the charge per mile (x). This equation is modeled below:
191.95 = 16.99 + 0.72x (remember that 72 cents in dollars is equal to 0.72!)
To solve this equation, we must get the variable x isolated on one side of the equation. To do this, we begin by subtracting 16.99 from both sides of the equation.
174.96 = 0.72x
Next, we must divide both sides of the equation by 0.72 to get rid of the coefficient on the variable x.
x = 243
Therefore, your answer is Ahmad drove the truck for 243 miles.
Hope this helps!