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Alexeev081 [22]
3 years ago
10

Find 3x-y-3z if x=-2, y=1, z=-2

Mathematics
2 answers:
horsena [70]3 years ago
8 0
Substitute everything in first


3(-2)-1-3(-2)


Then simplify


-6-1+6 = -1


The answer is -1
Mice21 [21]3 years ago
4 0
3 x (-2) - 1 - 3 x (-2) 
(Simplify by: Multiplying a positive and a negitive equals a negative: 
(+) x (-) = (+)) 
Multiplying two negitives equals a positive:
(-) x (-) = (+) )
-3 x 2 - 1 + 3 x 2
(Eliminate the opposites)
Answer: -1
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A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 190 lb and each bo
vagabundo [1.1K]

Answer:

25 boxes.

Step-by-step explanation:

We have the inequality:

190 + 60x ≤ 1740  where  x = the number of boxes of books.

60x  ≤  1740 - 190

60x   ≤  1550

x ≤ 25.83.

6 0
3 years ago
Read 2 more answers
Suppose a coin is flipped and a card is drawn from the deck. What is the probability that the coin lands on tails and the card i
Deffense [45]

Answer:

1/26

Step-by-step explanation:

1 out of 13 would be equal to the amount of cards that would be a jack.

But you also have to take into regards the coin flip 50%chance so you would just could what the number is divided by to get the right answer. Since out come could be tails or head instead of just being one for sure for example.

5 0
3 years ago
12 out of 30 tickets sold were early admission what percentage of tickets were early admission tickets
bezimeni [28]

Answer:

40%

Step-by-step explanation:

12 divided by 30 will give you 0.4

7 0
3 years ago
Please somebody help need an answer
levacccp [35]
6= 4(z+9)/y+2
6y +12 =4(z+9)
6y=4(z+9) -12
y=(4(z+9)-12)/6
y=2z+18-6/3
y=2z+12 /3
4 0
3 years ago
1/5z -5/6 = -4/5z -1/3
sveta [45]

Answer:

z = 15/30 = 3/6

Step-by-step explanation:

1/5z - 5/6 = - 4/5z - 1/3

1/5z + 4/5z = - 1/3 + 5/6

5/5z = - 2/6 + 5/6

5/5z = 3/6

z = 3/6 / 5/5

z = 3/6 * 5/5

z = 15/30

6 0
3 years ago
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