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nexus9112 [7]
3 years ago
12

Solve by augmented matrix (GJ) 2x + 3y – 4z = 1 4x + y + 2z = -3 pls help!!

Mathematics
1 answer:
otez555 [7]3 years ago
5 0

Answer:

3x-y-2z=4. 2x+3y-4z=1

4x-7y-6z=-7. -x+6y+4z=11

- +. +. +. x+9y=12

____________.

-x +6y +4z=11.

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A printer prints fewer than 18 pages per minute. What is the maximum number of pages the printer can print in 7 minutes?
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Answer:127 pages of paper

Step-by-step explanation:

18 times 7

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3 years ago
Anna and Bobie joined two different swimming classes at the same time.
jeyben [28]

Answer:

It would be 10 months for the price of $320.

Step-by-step explanation:

First we need to find how much Anna's swimming charge and Bobie's charge is.

PA=70+t The price of the month equals to the starting fee and monthly charge

120=70+2t The price of 2 months times the monthly charge

50=2t

25=t           is Anna's monthly charge

PB=250+t   is Bobies starting price and monthly charge

264=250+2t is the month charge for Bobie after 2 months

14=2t

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70+25x=250+7x    We need to find x which is what month will satisfy both equations

25x=180+7x         Subtract 70 from both sides

18x=180                Subtract 7x from both sides

x=10                      divide 18 from both sides

Now we have the months that satisfy both equations we need to find the total price that matches with it. So we plug it back into both equations.

PA=70+25x                                               PB=250+7x

PA=70+25(10)                                            PB=250+7(10)

PA=70+250                                               PB=250+70

PA=320                                                      PB=320

6 0
3 years ago
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Answer:

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3 years ago
Is 70 − –99 positive or negative?
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Step-by-step explanation:

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3 years ago
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Karen traveled at a rate of 65 mph for 7 hours.
yulyashka [42]

Answer:B

Step-by-step explanation:

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