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oksano4ka [1.4K]
3 years ago
14

6x-2y=-2

Mathematics
2 answers:
tatiyna3 years ago
8 0

Answer:

7x-7y=14

x=3 and y= 1

i think :)

Step-by-step explanation:

Zarrin [17]3 years ago
5 0
You’re not wrong! i did the work and got the same thing as you.

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3. Find mZPST.<br> 9<br> T<br> (111 - 3)"<br> (58-9)<br> Р<br> R
4vir4ik [10]

Answer:

Step-by-step explanation:

11x-3+5x-9=180

16x-12=180

16x=192

x=12

<pst=129

5 0
3 years ago
Consider the hypotheses below. Upper H 0​: mu equals 50 Upper H 1​: mu not equals 50 Given that x overbar equals 60​, s equals 1
Neko [114]

Answer:

We conclude that  \mu\neq 50.

Step-by-step explanation:

We are given that x bar = 60​, s = 12​, n = 30​, and alpha = 0.10

Also, Null Hypothesis, H_0 : \mu = 50

Alternate Hypothesis, H_1 : \mu \neq 50

The test statistics we will use here is;

                    T.S. = \frac{Xbar-\mu}{\frac{s}{\sqrt{n} } } ~  t_n_-_1

where, X bar = sample mean = 60

              s = sample standard deviation = 12

              n = sample size = 30

So, Test statistics = \frac{60-50}{\frac{12}{\sqrt{30} } } ~ t_2_9

                             = 4.564

At 10% significance level, t table gives critical value of 1.311 at 29 degree of freedom. Since our test statistics is more than the critical value as 4.564 > 1.311 so we have sufficient evidence to reject null hypothesis as our test statistics will fall in the rejection region.

P-value is given by, P(t_2_9 > 4.564) = less than 0.05% {using t table}

Here also, P-value is less than the significance level as 0.05% < 10% , so we will reject null hypothesis.

Therefore, we conclude that \mu\neq 50.

7 0
3 years ago
the angle of elevation of a jet plane from a point P on the ground is 60 degree after a flight of 15 seconds the angle of elevat
Nana76 [90]

Answer:

200m/s

Step-by-step explanation:

Please see the attached pictures for full solution.

5 0
3 years ago
Please and thank you!
Len [333]

Answer: ALALALALALALA

Step-by-step explanation: PAAPAPPAPAPAPPAPAPAPAPA

5 0
2 years ago
What is the value of fraction 1 over 3 x2 + 5.2y when x = 3 and y = 2?
Vadim26 [7]

Answer:

1over 38

Step-by-step explanation:

U substitute the values of x and y on the given equation

5 0
1 year ago
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