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Keith_Richards [23]
2 years ago
12

The sum of two numbers is -6. The difference is 16. Find the two numbers.

Mathematics
1 answer:
Bess [88]2 years ago
7 0

Answer:

-5\:\mathrm{and}\: 11

Step-by-step explanation:

We can write the following system of equations:

\begin{cases}x+y=6\\x-y=16\\\end{cases}

Adding both equations together, we isolate x and get:

2x=22,\: x=11

Plugging x=11 in any of the equations, we can solve for y:

11+y=6,\: y=-5

Verify that the solution pair (11, -5) works \checkmark

Therefore, the two numbers are \fbox{$-5\:\mathrm{and}\: 11$}.

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Answer:

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Step-by-step explanation:

Population density is the ratio of population to area. Its units are persons per square mile. Here, you're being asked to compare the population densities of several countries to the average population density in several US states.

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<h3>average</h3>

The idea of "average population density of the 10 states listed" is somewhat ambiguous. It could mean either of (a) the ratio of the total of the states' population to the total of their land area, or (b) the average of the population densities of the states. (In the attached, we computed both, but the answer remains the same using either number.)

When there are numerous identical calculations to be performed, it is convenient to let a spreadsheet do them. The attached spreadsheet shows the population densities for the 10 states and 5 countries listed.

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<h3>countries</h3>

The 5 countries have population densities ranging from about 7.7 to 236 people per square mile. Two of the countries have density below 10.5, so are the answers to the question asked.

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1 year ago
Can someone explain how to do this and the answer?
inysia [295]

Step-by-step explanation:

Helo

your answer refer to the attachment

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3 years ago
McDonald's has about 21000 managers and each year makes on average $39000/year, how much does McDonald's spend on managers each
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I wanna know an integer greater than -3 but less than 3
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Given AQRS-AXYZ, what is the value of tan(Q)?<br><br> A) 3/5<br> B) 3/4<br> C) 4/5<br> D) 4/3
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The answer is B.

Since ΔQRS ~ ΔXYZ, the value of tan(Q) is :

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