What is the value of 5x+ 3 when X= 4? 9 12 23 60

2 answers:

7 0

The answer is 23 because you would substitute in the 4 for the X and multiply 5 times 4 = 20 then add 20 plus 3 and you get 23

nikklg [1K]4 years ago

7 0

First, you plug in X as being four. 5 x 4 is 20, and 20 + 3 is 23. Thus, 23 is the answer.

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In a study of the population density of bullfrogs, 25 are captured and marked in the first sampling. Five days later, 30 frogs a

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Answer:

Step-by-step explanation:

Let x represent the number of bullfrogs in the population.

We have been given that in a study of the population density of bullfrogs, 25 are captured and marked in the first sampling. Five days later, 30 frogs are captured, 10 of which have marks.

We will use proportion to solve our given problem as:

$\frac{\text{Number of total bullfrogs}}{\text{Number of marked bullfrogs}}=\frac{30}{10}$