Answer:
B
Step-by-step explanation:
I took the test
Answer:
See the explanation.
Step-by-step explanation:
We are given the function f(x) = x² + 2x - 5
Zeros :
If f(x) = 0 i.e. x² + 2x - 5 = 0
The left hand side can not be factorized. Hence, use Sridhar Acharya formula and
and
⇒ x = -3.45 and 1.45
Y- intercept :
Putting x = 0, we get, f(x) = - 5, Hence, y-intercept is -5.
Maximum point :
Not defined
Minimum point:
The equation can be expressed as (x + 1)² = (y + 5)
This is an equation of parabola having the vertex at (-1,-5) and axis parallel to + y-axis
Therefore, the minimum point is (-1,-5)
Domain :
x can be any real number
Range:
f(x) ≥ - 6
Interval of increase:
Since this is a parabola having the vertex at (-1,-5) and axis parallel to + y-axis.
Therefore, interval of increase is +∞ > x > -1
Interval of decrease:
-∞ < x < -1
End behavior :
So, as x tends to +∞ , then f(x) tends to +∞
And as x tends to -∞, then f(x) tends to +∞. (Answer)
Answer:
C, both methods save the same amount of money
Step-by-step explanation:
First, we need to calculate what each answer choice will equal.
For A, it asks us to add the sales tax and then take the discount off. So, to find out what the sales tax is equal to, we multiply 720 x 0.06 (because 6% is equal to 0.06).
720 x 0.06 = 43.2
Add the sales tax to the original amount and you get 763.2.
Now we take the discount, which is 25% or 1/4.
1/4 of 763.2 is 190.8.
Subtract the discount from the price and you get 572.4.
For B, it says to take the discount first and then add the sales tax.
25% = 1/4, so 1/4 of 720 is equal to 180.
Subtract 180 from 720, and you get 540.
Now add the sales tax.
540 x 0.06 = 32.4.
540 + 32.4 = 572.4.
The answer is C, both methods save the same amount of money!
Answer:
Emily's mother will donate $20
Step-by-step explanation:
0.5x20=10