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Aleksandr [31]
3 years ago
15

Find x if y=-2 4x-6/y=15a. 9/2b.5c.3d.-6/23

Mathematics
2 answers:
GalinKa [24]3 years ago
8 0
X means everything in algebra. It is a variable, which means that its meaning changes based on context. For example, x could be time, but it could also be cars. x is what all Mathematicians chase after and it is also the greatest tool at their disposal. x is generally called an independent variable because its value determines the output of a function. y, on the other hand, is the result of fooling around with x. It's a dependent variable, which means that y changes when x changes. 

Take, for instance, the following function: 
y = x + 3 

Let's set x = 3. 
y = (3) + 3 
y = 6 

As you can see, what we input as x determines what y outputs.
Oduvanchick [21]3 years ago
5 0
Y = 6 .......................
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Big babies: The National Health Statistics Reports described a study in which a sample of 354 one-year-old baby boys were weighe
Vedmedyk [2.9K]

Answer:

Yes. The data provide enough evidence to support the claim that the mean weight of one-year-old boys is greater than 25 pounds.

P-value=P(t>2.84)=0.0024

Step-by-step explanation:

Hypothesis test on the population mean.

The claim is that the mean weight of one-year-old boys is greater than 25 pounds.

Then, the null and alternative hypothesis are:

H_0: \mu=25\\\\H_a:\mu>25

The significance level is α=0.05.

The sample size is n=354. The sample mean is 25.8 pounds and the sample standard deviation is 5.3 pounds. As the population standard deviation is estimated from the sample standard deviation, we will use a t-statistic.

The degrees of freedom are:

df=n-1=354-1=353

The t-statistic is:

t=\dfrac{\bar x-\mu}{s/\sqrt{n}}=\dfrac{25.8-25}{5.3/\sqrt{354}}=\dfrac{0.8}{0.2817}=2.84

For a right tailed test and 353 degrees of freedom, the P-value is:

P-value=P(t>2.84)=0.0024

As the P-value is smaller than the significance level, the effect is significant and the null hypothesis is rejected.

There is enough evidence to support the claim that the mean weight of one-year-old boys is greater than 25 pounds.

7 0
2 years ago
I WILL GIVE YOU BRAINLIEST NEED HELP PLEASEE :DD
Shtirlitz [24]

The coordinates of the pre-image of point F' is (-2, 4)

<h3>How to determine the coordinates of the pre-image of point F'?</h3>

On the given graph, the location of point F' is given as:

F' = (4, -2)

The rule of reflection is given as

Reflection across line y = x

Mathematically, this is represented as

(x, y) = (y, x)

So, we have

F = (-2, 4)

Hence, the coordinates of the pre-image of point F' is (-2, 4)

Read more about transformation at:

brainly.com/question/4289712

#SPJ1

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1 year ago
CAN SOMEONE HELP PLZZZ PLZZ PLZZZZZ ILL GIVE EVERYTHING
Studentka2010 [4]

Answer:

what do u need help with?

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Please help me; )!!!!!!!!!!!!!
Vaselesa [24]
To show how you decided, the simple way would be to draw a picture. Create 2 rectangles of the same length and divide them up according to the fraction. Then shade the number of pieces for the numerator and compare both fractions. Whichever is longer is the greater fraction.
5 0
3 years ago
14. On the diagram above, draw a horizontal line through the center of the 16 plots of land.
pshichka [43]

Answer:

The red line shows the division of 16 plots of a land as shown in figure attached.

Step-by-step explanation:

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