Which of the following is(are) the solution(s) to 7 |x + 21|= -49
1 answer:
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Answer:
The car must drive at 108 km/h to cover the same journey.
Step-by-step explanation:
Given that:
Time taken by bus journey = 45 minutes =
Speed of bus = 60 km/h
Distance of the journey = Speed * Time
Distance of the journey = 60 * 0.75 = 45 km
The car needs to cover 45 km in 25 minutes.
25 minutes =
Distance = Speed * Time
45 =
Speed =
Speed = 108 km/h
Hence,
The car must drive at 108 km/h to cover the same journey.
Answer:
Step-by-step explanation:
We are given that there is an exponential decay.
Also, the decrease is of constant rate 7.9% i.e. 0.079 each year.
Since, the initial amount of the species is atleast 26 million.
Thus, the inequality for the corresponding model will be, ,
where t is the time period for the decay and P is the population.
Moreover, is is given that the population cannot be less than 2 million.
So, we get, .
Hence, the inequalities to determine the possible number of insects over time are given by,
.
Answer:
Step-by-step explanation:
Add 2a² + a² + 2a² => 5a²
5a² ÷ 10a => a ÷ 2