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marissa [1.9K]
3 years ago
10

Explain how you could use the distributive property and mental math to find 5 * 198.

Mathematics
1 answer:
bogdanovich [222]3 years ago
6 0
5 * 198 = 990


 198
*    5
-------
 990
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Step-by-step explanation:

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PLEASE HELP ITS DUE AT MIDNIGHT
antiseptic1488 [7]
Answer:
The rest of the question is the attached figure
The percent change =
If (+ve) increase and if (-ve) decrease
Part A: What is the percent of change in the cost of a pizza?
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i found this online i hope if helps you

3 0
2 years ago
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What is the standard for of (1 7i)(3-i)?
marissa [1.9K]
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7 0
3 years ago
The sum of 5 and twice a number.
snow_lady [41]

Answer:

5+x2

Step-by-step explanation:

4 0
3 years ago
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Suppose a tub has the shape of an elliptical paraboloid given by z = ax2+by2 (where a, b are some positive constants). If a marb
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Answer:

It would roll in this direction.

\nu  =  (-a/\sqrt{a^2+b^2},-b/\sqrt{a^2+b^2})

Step-by-step explanation:

It would roll to the direction of maximum decrease, which is the -1 times the direction of maximum increase, which is given by the gradient of the function.  

Since  

z =  ax^2  + by^2

For this case, the gradient of your function would be

\nabla z  = (2ax , 2by)

And  -1  times the gradient of your function would be

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Then, at

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So it would go towards

v = (-2a,-2b)

The magnitud of that vector is

|v| =  2\sqrt{a^2+b^2}

and to conclude it would roll in this direction.

\nu  =  (-a/\sqrt{a^2+b^2},-b/\sqrt{a^2+b^2})

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