1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erica [24]
3 years ago
7

F(x)= 4x + 7 when x =2 and x = -2​

Mathematics
1 answer:
Liula [17]3 years ago
6 0

Answer:

The answer for x=2 is, 15. And the answer for x=-2 is, -1.

Step-by-step explanation:

When you input x=2, it turns out to be (4.2)+7 which is 15. When you input x=-2, this will lead us to (4.(-2))+7 which is -1.

You might be interested in
Which equation has slope of 1/2 and y intercept of -5
Roman55 [17]
The answer would be Y= 1/2x -5
8 0
4 years ago
Read 2 more answers
The price of Philip's favorite candy has been reduced by $0.15 per piece. Philip buys 14 pieces and spends $3.22.
Mice21 [21]
First: Figure out the cost per candy bar currently by dividing 3.22 and 14

3.22 / 14 = 0.23

Second: Add in 0.15 to your total to solve for the prior cost of the candy

0.23+0.15 = $0.38 
6 0
3 years ago
Read 2 more answers
In triangle DEF , DF = 16 and angle F = 45. Find the length of a leg. Leave your answer is radical form.
Inga [223]
B) would be my answer too
7 0
4 years ago
A random sample of 36 observations has been drawn from a normal distribution with mean 50 and standard deviation 12. Find the pr
Gre4nikov [31]

Answer:

z= \frac{47 -50}{\frac{12}{\sqrt{36}}}=-1.5

z= \frac{53 -50}{\frac{12}{\sqrt{36}}}=1.5

And using a calculator, excel ir the normal standard table we have that:

P(47 \leq \bar X \leq 53) =P(-1.5 \leq Z \leq 1.5)

And we can calculate the probability like this:P(-1.5 \leq Z \leq 1.5) = P(zStep-by-step explanation:

A random sample of 36 observations has been drawn from a normal distribution with mean 50 and standard deviation 12. Find the probability that the sample mean is in the interval 47<=X<53. Is the assumption of normality important. Why?

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

X \sim N(50,12)  

Where \mu=50 and \sigma=12

Since the distribution for X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

We can find the probability required like this:

z= \frac{47 -50}{\frac{12}{\sqrt{36}}}=-1.5

z= \frac{53 -50}{\frac{12}{\sqrt{36}}}=1.5

And using a calculator, excel ir the normal standard table we have that:

P(47 \leq \bar X \leq 53) =P(-1.5 \leq Z \leq 1.5)

And we can calculate the probability like this:

P(-1.5 \leq Z \leq 1.5) = P(z

4 0
3 years ago
Can one of you guys pls help
Gwar [14]

Answer:

Puts the dots where the A,B,C,D dots are and move them 5 units to the right.

Example:

Original place

A=(2,5)

Moved 4 units to the right:

A'=(6,5)

Here are some tips:

Up= Y value goes up

Down= Y value goes down

Right= X value goes up

Left X value goes down

6 0
3 years ago
Other questions:
  • The sales in one town is 8%. So, the total cost of an item can be written as c+0.08c. What is the total cost of an item that sel
    10·1 answer
  • What is the answer please help me please ?
    12·1 answer
  • Pls, help I have a soccer game and is my first one and don't wanna miss it :(
    10·1 answer
  • Item 22 Question 1 You have a coupon for 10% off the sale price of a surfboard. Which is the better buy? Explain your reasoning.
    5·1 answer
  • Which best explains why the eqation 4x+5=4x-1 has no solutions
    7·2 answers
  • X/2−5=−12<br> I need to know how to get the answer to X
    10·2 answers
  • Find the slope and the y-intercept of the line.<br><br> Y=-3/2x+7
    13·2 answers
  • What is the probability of rolling a 3 on a number cube and tossing tails on a coin?
    6·1 answer
  • In the trapezoid, find the measure of yº<br> (6x + 20°? Can y’all help?
    6·1 answer
  • ..............................................................................
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!