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Radda [10]
3 years ago
7

2x-y-3z=7, 3x+y+=10, 5x+y+2z=15

Mathematics
1 answer:
ivann1987 [24]3 years ago
4 0

Answer:

x=22/7 y=4/7 z=-3/7

Step-by-step explanation:

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MariettaO [177]

Answer:

answer is b

Step-by-step explanation:

8 0
3 years ago
1. m∠QPR =<br><br> 2. m∠QTP =<br><br> 3. RP =<br> Show all the work
alex41 [277]

Answer:

1. 30°

2.90°

3. 12 units

Step-by-step explanation:

I can't believe there's nothing confirming that this is a parallelogram/a rhombus?! Assuming is awful, and I wish you could say you can't know for sure lol but for the sake of this answer, let's just call it a rhombus. (There was probably some context elsewhere that you didn't put over here, hopefully.)

1.

The reason I say this is: in a rhombus, the diagonals bisect the angles. This means that the diagonals split the angles they meet into two equal parts. That way, it would make sense. m∠QPR=m∠SPR=30°.

2.

If it is a rhombus, the diagonals are perpendicular to each other, so m∠QTP should be 90°.

3.

Diagnonals in a rhombus (and in any parallelogram) bisect each other, so PT=TR=6, and RP=PT+TR=12 units.

Sorry if this is all dreadfully wrong, and I hope I helped you!

7 0
3 years ago
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of
Tanzania [10]

Answer:

17.11%

Step-by-step explanation:

since 43.2 months is the mean, and the standard deviation is 7.7 months

that means if we take the z score:

z=(36-43.2)/7.7

now that we know how many standard deviations you are away from the mean: -0.9351

using the zscore table you can find the proportion, or you can use the calculator if you have one that can do that.

you get 0.1711 which in percentages is 17.11%

7 0
3 years ago
Stuck On this one too. Think I’m missing a step
Elis [28]

Answer:

The answer is B) 152

Step-by-step explanation:

3 0
2 years ago
12 divided by 1 half
dolphi86 [110]

Answer:

24

Step-by-step explanation:

4 0
3 years ago
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