Answer:
Selena is correct because she simplified correctly and then evaluated correctly after substituting the values for the variables.
I did this lesson i asked my teacher to help me but i did this problem on my own so i hope its right :)
Step-by-step explanation:
Answer:
I am
Step-by-step explanation:
1500
Answer: The answer is −6p^2-23p-20
Answer:
- <u><em>Option A. 64,500</em></u>
Explanation:
1. First, calculate the number of hits had during the month, by difference:
- 50,165 hits - 7,278 hits = 42,887 hits
2. Round the result to obtain an approximation = 43,000 hits
3. Multiply by the time that each lasted:
- 43,000 hits × 1.5 min/hit = 64,500 minutes.
Hence, the answer is the option A.
Answer:
Option A is correct, i.e. x = -3, x = 7.
Step-by-step explanation:
Given the equation is x² -4x -21 = 0.
We can compare it with general quadratic equation i.e. ax² +bx +c =0.
then a = 1, b = -4, c = -21.
We can use Quadratic formula as follows:-
x = ( -b ± √(b²-4ac) )/2a
x = ( +4 ± √(16-4*1*-21) )/2*1
x = ( +4 ± √(16+84) )/2
x = ( +4 ± √(100) )/2
x = ( +4 ± 10 )/2
x = (4+10)/2 or x = (4-10)/2
x = 14/2 or x = -6/2
x = 7 or x = -3
Hence, option A is correct, i.e. x = -3, x = 7.
