All categories

3 years ago

Can someone help please?

Mathematics

1 answer:

alina1380 [7]3 years ago

5 0

Answer:

(-1, 3)

Step-by-step explanation:

The given equation is 2x + y = 5.

Test whether (-1, 3) is a solution. To do this, substitute -1 for x and 3 for y. Does 2(-1) + 3 = 5? No, it does not. So this could be the correct answer choice.

Test whether (6, -7) is a solution. Is 2(6) - 7 = 5 true? Yes, it is. So this is not a correct choice.

Test whether (3, -1) is a solution. Is 2(3) -1 = 5? Yes, it is. So this is not a correct choice.

Summary: The only answer choice that does NOT satisfy the given equation is the first one: (-1, 3).

You might be interested in

A random sample of 100 observations from a quantitative population produced a sample mean of 22.8 and a sample standard deviatio

natima [27]

Answer:

We conclude that the population mean is 24.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 24

Sample mean, $\bar{x}$ = 22.8

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 8.3

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 24\\H_A: \mu \neq 24$

We use Two-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{22.8 - 24}{\frac{8.3}{\sqrt{100}} } = -1.44$

We calculate the p-value with the help of standard z table.

P-value = 0.1498

Since the p-value is greater than the significance level, we accept the null hypothesis. The population mean is 24.

Now, $z_{critical} \text{ at 0.05 level of significance } = \pm 1.96$

Since, the z-statistic lies in the acceptance region which is from -1.96 to +1.96, we accept the null hypothesis and conclude that the population mean is 24.

7 0

3 years ago

Terry weighs 40kg janice weighs 2 3/4 lg less than terry. what is their combined weight?

Liula [17]

I hope this helps you

Janice 2 3/4= 2.4+3/4=11/4

40.11/4-40=110-40=70kg janice

Terry 40 kg

40+70=110

7 0

3 years ago

Drag a graph to each category based on the slope of the graph. IM GIVING YOU 26 POINTS HERE PEOPLE!!!!

ExtremeBDS [4]

Answer:

The first picture goes with the second sentence.

The second picture goes with the first sentence.

The third picture goes with the third sentence.

The fourth picture goes with the fourth sentence.

Step-by-step explanation:

8 0

3 years ago

Solve the equation by completing the square.<br><br> 3x^2 -6+9=0

Debora [2.8K]

The factored form would be (3x-9)(x-1)
The picture should help a bit

8 0

3 years ago

Read 2 more answers

A factory produces bottled water at a rate of 2,000 cases per hour. They know that 1.14% of the cases must be rejected because a

IRINA_888 [86]

1.14 per 100 or 1.14:100 or $\frac{1.14}{100}$

$\frac{1.14}{100} = \frac{n}{2000}$

I will multiply the numerator by 20 because multiplying by 20 is how 100 became 2000
22.8 cases are rejected per hour.

4 0

3 years ago