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sweet-ann [11.9K]
3 years ago
12

The following system has no solution. x+y+z= 15 2x+z = 1 27-z=7 true or false

Mathematics
1 answer:
Luba_88 [7]3 years ago
8 0

Answer:

False

Step-by-step explanation:

Let us start with the most obvious one:

27 - z = 7

-27 - 27

_________

-z = -20

z = 20 [Plug this back into the other two equations to get the y-coordinate and x-coordinate of 4½ and -9½]; 4½ = y; -9½ = x

So, the solution is [-9½, 4½, 20].

I am joyous to assist you anytime.

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Solve these equations 27x + 14 =500. <br> 600= 12 + 14y
Oksana_A [137]

Answer:

x = 18 , y = 42

Step-by-step explanation:

27x + 14 = 500

      -14      -14

This process above moves the +14 to the right hand side, making it negative 14

27x = 486

To find x, divide 27 by 486

x = 486/27

x = 18

600 = 12 + 14y

Move the 12 to the left hand side to remain the 14y

600 = 12 + 14y

-12     -12

588 = 14y

Divide 14 by 588

588/14 = y

y = 42

3 0
3 years ago
F(x) = 2x3 + 6x2 – 5x – 3
Marizza181 [45]

Answer:

D) is the answer

Step-by-step explanation:

It is taught in 5th class in India

Mark as Brainliest.

Because I am Indian and solving your question from India.

8 0
2 years ago
In a previous​ year, 58​% of females aged 15 and older lived alone. A sociologist tests whether this percentage is different tod
Gemiola [76]

Answer:

z=\frac{0.565 -0.58}{\sqrt{\frac{0.58(1-0.58)}{600}}}=-0.744  

Since is a bilateral test the p value would be given by:  

p_v =2*P(z  

And since the p value is higher than the significance level we have enough evidence to conclude that the true proportion is not significantly different from 0.58

Step-by-step explanation:

Information given

n=600 represent the random sample selcted

X=339 represent the number of females aged 15 and older that living alone

\hat p=\frac{339}{600}=0.565 estimated proportion of females aged 15 and older that living alone

p_o=0.58 is the value that we want to check

\alpha=0.01 represent the significance level

z would represent the statistic

p_ represent the p value

Sytem of hypothesis

We want to check if the true proportion females aged 15 and older that living alone is significantly different from 0.58.:  

Null hypothesis:p=0.58  

Alternative hypothesis:p \neq 0.58  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we got:

z=\frac{0.565 -0.58}{\sqrt{\frac{0.58(1-0.58)}{600}}}=-0.744  

Since is a bilateral test the p value would be given by:  

p_v =2*P(z  

And since the p value is higher than the significance level we have enough evidence to conclude that the true proportion is not significantly different from 0.58

5 0
3 years ago
Find the volume of the figure shown 2m 6m 6m 9m 16m
navik [9.2K]

Answer:

the answer is 10368 hope this help have a great day mark brainliest pls

Step-by-step explanation:

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Can anyone help me with problem 5
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The answer to your question would be -120
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