Answer:
So for memorisation, visualising is extremely important, I attended a memory course and it stated that visualisation is by far the best method. Always link words to pictures to remember them faster. Also some extras: Don’t procrastinate, do your work early on, always concentrate!
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Solution: (1)The interval notation of is .
Explanation:
The product of two expression is positive if and only if both are positive or both are negative.
case 1: and
Then and
From above conditions .
case 2: and case 2:
Then and
From above conditions .
By case 1 and 2 it is conclude that the interval notation of is .
Solution: (2) The interval notation of is .
Explanation:
The relative equation of the above inequality is
Equate each factor equal to 0. The zeros of above equation is -7,-1 and 1. These points divides the number line in 4 parts or intervals. The any value from those interval to check the inequality. If the test point satisfies the equality then that interval is the solution of the inequality.
By the above process the interval notation of is .
Solution: (3) The ball is lower than the building for .
Explanation:
The height of the ball is given by the equation and the height of the building is 280ft.
The ball is lower than the building if the height of the ball is less than 280ft, i.e., .
The time is always positive, so the first factor 16t is always positive. Since first factor is positive and the product of both factors is less than zero, therefore the second factor (-t+3) is always less than zero.
Therefore, the ball is lower than the building for .
Answer:
displacement = 75 km
Step-by-step explanation:
the distance from final to initial point gives the displacement
displacement = 120 - 45
Answer:
<em>-5, -3 = Quadrant |||</em>
Step-by-step explanation:
-3, 5 = Quadrant ||
4, 2 = Quadrant |
2, -4 = Quadrant |||| (Quadrant |||| is also known as Quadrant IV)
<u><em>~ LadyBrain</em></u>
Answer: See explanation
Step-by-step explanation:
Since Smart Dot Company costs $12 per month plus $0.50 for each hour of Internet used, the equation to represent the cost of using the internet with them will be:
C = 12 + 0.5t
Since Communication Plus costs $2.50 for every hour of Internet used, the equation to represent the cost of using the internet with them will be:
C = 2.5t