Answer:
Combine like terms - 3+x=4
Given - 3 +4x -3x =4
Subtraction Property of Equality- x=1
Answer:
The experiment design used in this case is the between-subjected design.
Step-by-step explanation:
Between-subject design is a sort of experimental design where the individuals of an experiment are allocated to varied situations, with each individual being treated with only one of the experimental conditions.
In this case three similar ecosystems are designed containing a variety of insects and plants. Then each ecosystem to be exposed to rock music, country music, or a conventional city soundscape for two consecutive weeks.
Then after two weeks period they measured how successful the species were in each ecosystem.
The experiment design used in this case is the between-subjected design.
The average number of fish per cubic kilometer is
.
The correct option is B.
Given
The volume of one of the Great Lakes is 3.5 × 103 cubic kilometers.
The number of fish in the lake = 6. 3 × 107.
<h3>What is the average value?</h3>
The average is the middle value of the given data set and is calculated by adding up all the numbers and dividing the result by the total quantity of figures added.
The average number of fish per cubic kilometer is given by;

Substitute all the values in the formula;

Hence, the average number of fish per cubic kilometer is
.
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