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Kruka [31]
3 years ago
8

Find x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3

Mathematics
2 answers:
Novosadov [1.4K]3 years ago
6 0
The answer is -49
First you plug in your numbers following the letter
After plugging it in you get the equation
3•3-(2•5•2)-(3•3•3)+-3•4
Simplified as
9-20-27-12
After doing this you get -49
Shtirlitz [24]3 years ago
4 0
3(3)-2(5)2-3(3)3+(-3)4=

9-20-27+-12

-50

I think I solved the problem correctly.
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Please help whats the answer !!?
Soloha48 [4]

The correct answer is the one on the top right corner.

3 0
3 years ago
Working together, it takes two different sized hoses 20 minutes to fill a small swimming pool. If it takes 30 minutes for the la
Anuta_ua [19.1K]

Answer:

60 minutes for the larger hose to fill the swimming pool by itself

Step-by-step explanation:

It is given that,

Working together, it takes two different sized hoses 20 minutes to fill a small swimming pool.

takes 30 minutes for the larger hose to fill the swimming pool by itself

Let x be the efficiency to fill the swimming pool by larger hose

and y be the efficiency to fill the swimming pool by larger hose

<u>To find LCM of 20 and 30</u>

LCM (20, 30) = 60

<u>To find the efficiency </u>

Let x be the efficiency to fill the swimming pool by larger hose

and y be the efficiency to fill the swimming pool by larger hose

x = 60/30 =2

x + y = 60 /20 = 3

Therefore efficiency of y = (x + y) - x =3 - 2 = 1

so, time taken to fill the swimming pool by small hose = 60/1 = 60 minutes

8 0
3 years ago
If you are smart put this emojiif u not smart put this emoji ok thanks
PtichkaEL [24]
Yesssss that is right
3 0
3 years ago
Read 2 more answers
-4 3/5 divided by 1 1/5 as a mixed number or simplified
WITCHER [35]
-23 over 5 ÷ 11 over 5
-23 × 5 over 5 × 5
-115 over 55


Therefore, your answer would be: -2 and 1 over 11
4 0
4 years ago
Read 2 more answers
Which of the following are solutions to the equation sinx cos(pi/7)-sin(pi/7)cosx=sqrt(2)/2
Arturiano [62]

The solution would be like this for this specific problem:

sin ( x - ( pi / 7 ) ) = - sqrt ( 2 ) / 2
x - ( pi / 7 ) = - pi / 4 + 2n*pi or x - ( pi / 7 ) = (5pi / 4 ) + 2n*pi
x = ( pi / 7 ) - ( pi / 4 ) + 2n*pi or x = ( 5pi / 4 ) + ( pi / 7 ) + 2n*pi
x = ( - 3pi / 28 ) + 2n*pi 

<span>I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.</span>

6 0
3 years ago
Read 2 more answers
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