• First way to solve:
We'll manipulate the expression of the equation:

If we have y=0:

Then, the function has one real zero (x=3) and two imaginary zeros (4i and -4i).
Answer: B
• Second way to solve:
The degree of the function is 3. So, the function has 3 complex zeros.
Since the coefficients of the function are reals, the imaginary roots are in a even number (a imaginary number and its conjugated)
The function "has only one non-repeated x-intercept", then there is only one real zero.
The number of zeros is 3 and there is 1 real zero. So, there are 2 imaginary zeros.
Answer: B.
Answer:
Option D doesn't make any sense.
Step-by-step explanation:
D) 7 hours of sleep correspond to an age of 19 years.
That is wrong.
If we use the expression provided
hours = 8 + 0.5*(18 -age)
hours = 8 + 0.5*(18 -19)
hours = 8 + 0.5*(-1)
hours = 7.5
Answer:
$10.01
where x = 4.1/10 x=14.11
Step-by-step explanation:
-7x^2 + 32x + 240
-7x^2 +32x
-49x+32 +240
240/17x = 17/240
240/49x = 4 9/10
x = 14.11 - 4. 10 9/10
x = -4.01
rounded to 2dp
x = 14.11
x = -4.01
Tacos should be priced at $10.01
The equation is 3r = 10 + 5s
we’re looking for the value of s when r = 10
3(10) = 10 + 5s
30 = 10 + 5s
-10 -10
20 = 5s
4=s
S = 4 when R = 10