Given:
1st week: caught 45 salamanders and put leg bands on them
2nd week: caught 50 salamanders and 3 have leg bands
3/50 = 0.06 of the salamander population have leg bands.
45 / 0.06 = 750 total number of salamanders
<span>45/750 = 0.06 or 6% </span>
The reasonable estimate of the number of salamanders by the pond is 750 salamanders.
flip over the line, then slide up
Answer:
Given that
Marks of ten friends
23%, 37%, 45%, 49%, 56%, 63%, 63%, 70%, 72% and 82%
Mean = 56
Variance = 284.6
Standards deviation = 16.9
<h3>
Answer: Choice B</h3>
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Explanation:
Here's a slightly more detailed breakdown of what's going on
3x + 2y = 15 ... start with the first equation
3x + 2( y ) = 15 .... the parenthesis don't change the expression
3x + 2( 3x+5) = 15 ... replace y with 3x+5; since y = 3x+5
From here, you solve for x like you would any other single variable equation. Once you know x, you can determine y through y = 3x+5.
Answer:
80 men
Step-by-step explanation:
4 : 5 10 : 9
40 : 50 : 45
40 x 2 = 80
