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Lilit [14]
3 years ago
7

what is teh maximum area of a reactangle that is inscribed in an ellipse of equation 81x^2 +64y^2 =19

Mathematics
1 answer:
Jet001 [13]3 years ago
3 0

(9x + 8y2) • (9x - 8y2)

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HELP!!! MORE POINTS AND BRAINLIEST!!!<br><br> PLEASE PUT STEP BY STEP<br><br> 4 divided by 6
Arada [10]

Answer:

The answer will be 0.666 repeating.

Step-by-step explanation:

4/6 = 0.6666.....

Since the numerator (4) is smalled than the denominator(6) the answer will be a decimal.

when 4 is divided by 6 it will gives us 0.66666667....

Hope this helps!! I guess

6 0
3 years ago
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Write and expression to match the words “three times the sum of 8 and 4”
JulijaS [17]

Answer:

8+4=12

sooo

3x12=36

Step-by-step explanation:

8 0
3 years ago
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Ben earns an annual income of $12,800 a year. The income tax he has to pay is 15%. What is the amount of income tax in dollars a
timurjin [86]

Answer:

Step-by-step explanation:

Using I=PRT (interest= principal times rate times time) we can solve the problem

12800 times 0.15 (15%) =1920 then you multiply it by time and then you have your answer

4 0
3 years ago
A piece of work can be completed by 45 men in 90 days if only 30 men are available, how many days will it take to complete the s
andrew-mc [135]

Answer:

  135 days

Step-by-step explanation:

Often, we measure work in man·days. This piece of work requires ...

  (45 man)·(90 days) = 4050 man·days

When there are only 30 men, the number of days required can be found by dividing this work by the number of men:

  4050 man·days/(30 man) = 135 days

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Another approach is to realize the time is inversely proportional to the number of men. If the number of men is 30/45 = 2/3 the original, then the time will be 3/2 the original, or ...

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7 0
3 years ago
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Solve the system using substitution:<br> X+Y=5<br> Y=X - 9
makvit [3.9K]

Answer:

x = 7

y = -2

Step-by-step explanation:

There are 2 equations. The substitution method takes one equation and puts it into the other and solves for 1 variable. Then you take that answer and put into any one equation and solve for the other variable.

Since equation #2 is already given for y = SOMETHING, we take that something and put it into "y" of the 1st equation. Shown below:

x+y=5\\x+(x-9)=5\\x+x-9=5\\2x=5+9\\2x=14\\x=\frac{14}{2}\\x=7

We got x = 7

Now, we know from Equation #2, y = x - 9, so

y = x - 9

y = 7 - 9

y = -2

Hence,

y = -2

In coordinate pair, the answer is (7, -2)

3 0
3 years ago
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