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nata0808 [166]
3 years ago
5

Which two units you would use to measure population density?

Mathematics
2 answers:
algol [13]3 years ago
8 0
Considering that the lesson is on density and density means human population in a certain area I would go with option C
melisa1 [442]3 years ago
3 0
You are measuring people and animals, so this is for sure two of your units. For the next units, you need to choose something big enough to hold a large number of these, so you would use square meters and acres. The answer is the third option: <span>number of people per square meter and number of animals per acre</span>
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A town in east Texas received 15 inches of rain in two weeks. If it kept raining at this rate for a 31−day month, how much rain
blsea [12.9K]

Answer:

33 inches

Step-by-step explanation:

The problem above shows a <em>"direct proportion,"</em> which means that when one quantity increases <em>(days)</em>, the other quantity increases<em> (inches of rain).</em>

Step 1: Represent the amount of rain by n.

Step 2: Setup a proportion.

            \frac{15}{14} = \frac{n}{31} (where 14 refers to the number of days in 2 weeks)

Step 3: Cross multiply:

           15 x 31 = 14n

            465 = 14n

Step 4: Find n by dividing both sides by 14.

            n = 33.21

Step 5: Round off to the nearest inch.

           n = 33 inches

4 0
3 years ago
Translate the following sentence to an equation. If a number is divided by negative six, the solution is negative three.
natulia [17]
Correct answer is A cause n represents then number and is being divided by -6 and the solution to that problem equals 3. so the answer is A.
4 0
3 years ago
Fifteen is % of 120.
Mariana [72]

Answer:

15 is 12.5% of 120

35% of 160 is 56

48 is 80%of 60

11 is 20% of 55

1.Equation- a statement that two expressions are equal.

2.Expression- a phrase that represents a mathematical relationship

Step-by-step explanation:

Hope this helps! Sorry if any are wrong!

3 0
3 years ago
Read 2 more answers
There are 100 students at the end of year school bar-b-que. The ratio of boys to girls is 4:6. The ratio of vegetarian girls to
wariber [46]
Answer: There are 60 girls and 40 boys at the bar-b-que

============================================================

Explanation:

b = number of boys
g = number of girls

"The ratio of boys to girls is 4:6" so 
b = 4*x
g = 6*x
where x is some positive whole number

Add up the counts of boys and girls. This count should equal 100
b+g = 100

Plug in b = 4x and g = 6x. Then solve for x
b+g = 100
4x+6x = 100
10x = 100
10x/10 = 100/10 ... divide both sides by 10
x = 10

If x = 10, then
b = 4*x = 4*10 = 40 ---> there are 40 boys
g = 6*x = 6*10 = 60 ---> there are 60 girls

we can see that the ratio
40 boys: 60 girls
reduces to
4 boys: 6 girls
In other words, for every 4 boys, there are 6 girls. The ratio 4:6 can be fully reduced to 2:3 which means for every 2 boys, there are 3 girls. 

Side note: if the ratio of vegetarian girls to omnivorous girls is 1:1, then there are 30 of each
we can solve y+y = 60 to find that y = 30, or we can simply divide 60 in half to find this count. Saying "a ratio of 1:1" means that there are the same number of vegetarians as omnivorous girls.

4 0
3 years ago
Find the constant(s): 12x - 8 - 12​
Anuta_ua [19.1K]

Hello there!

-8 and -12 are constants

A constant is any real number.

Hope this helps!

~Just a determined gal

#CarryOnLearning

MysteriousNature

7 0
2 years ago
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