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Delicious77 [7]
3 years ago
11

Evaluate the following expression when x = -1, y = 2, z = -3, and w = 4. x² - y²

Mathematics
1 answer:
vaieri [72.5K]3 years ago
7 0

Answer:

-3

Step-by-step explanation:

-1*-1=1

2*2=4

1-4

=-3

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Simplify the expression 224,000 X 0.00021 using scientific notation and express your answer in scientific notation.
Marizza181 [45]

Answer:4.704×10^1

Step-by-step explanation:

To simplify 224000×0.00021 in scientific notation

We get

224000×0.00021

47.04

4.704×10^1

4 0
3 years ago
Find all the second partial derivatives. v = e5xey
Helga [31]
I'm taking the liberty of editing your  function  <span>v = e5xey:  It should be 
</span>
<span>v = e^5x^ey, with " ^ " indicating exponentiation.
</span>
Did you mean e^(5x) or (e^5)x?  I'll assume it's e^(5x).

The partial of   v = e^(5x)e^y with respect to x is e^(5x)(5)*e^y, or 25x*e^y.

The partial of v = e^(5x)e^y with respect to y is e^(5x)e^y.
5 0
3 years ago
The system of equations: 5x-4y=-3
Sophie [7]

Answer:

3)5x-4y=-3

6x+4y=14

Step-by-step explanation:

The system of equations is given

5x-4y=-3

3x+2y=7

Multiplying both sides of the lower equation by 2, we get

6x + 4y = 14

That means your answer 3)

5 0
3 years ago
If a secretary typed 10,800 words in 2 hours and 30 minutes, how many words per minute did she type? ( Hint: Change hours to min
melamori03 [73]
<h3>Answer:  72 words per minute</h3>

Work Shown:

1 hour = 60 min

2 hours = 120 min (multiplied both sides by 2)

2 hours + 30 min = 120 min + 30 min = 150 min

speed = (number of words typed)/(time taken)

speed = (10800 words)/(150 min)

speed = (10800/150) words per minute

speed = 72 words per minute

4 0
2 years ago
Line AB is congruent to Line CD Explain the relationship between the highlighted angles using precise mathematical language. A +
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Answer:

its #

Step-by-step explanation:

3 0
3 years ago
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