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
fiasKO [112]
3 years ago
7

I really need help!!!!!!!!!!!!!!!

Mathematics
1 answer:
ziro4ka [17]3 years ago
8 0
2 one , going up and down
You might be interested in
Solve 7 + x - 15 = -2 2/3 Please help!!! show your work please!
Margaret [11]
Firstly let’s make the -2 2/3 easier

-2*2/3= -4/3

Then we will move all the numbers to one side and keep the x on the other side. Remember when u move a negative from one side of the equal sign it changes to positive and if u move a positive it changes to a negative.

X= -4/3+15-7
=-4/3+8
=-4/3+24/3 (To add fractions the denominator has to be the same, and 24/3 is the same as 8)

X=20/3

Hopefully this helps
3 0
3 years ago
Which of these coordinates would represent the intercepts of the graph of the function f(x)=3x-9
4vir4ik [10]
(3,0) and (0,-9)
Explanation: type the equation in a graphing calculator and the answer is the points where the line crosses the x and y axis

7 0
2 years ago
Read 2 more answers
What is the definition of A net (of a shape)
Hatshy [7]

Answer: A pure mathematics internet could be a 2-dimensional form that may be rolled-up to make a three-d form or a solid. Or a internet could be a pattern created once the surface of a solid figure is ordered out flat showing every face of the figure. A solid could have totally different nets.

Step-by-step explanation: A pure mathematics web could be a 2-dimensional form which will be closed to make a third-dimensional form or a solid. Or a web could be a pattern created once the surface of a solid figure is arranged out flat showing every face of the figure. A solid could have completely different nets.

6 0
3 years ago
Read 2 more answers
Give all possible names for the line shown.
Andreas93 [3]
I believe that the only combinations would be EF and FE.
7 0
3 years ago
A manufacturer must test that his bolts are 4.00 cm long when they come off the assembly line. He must recalibrate his machines
storchak [24]

Answer:

The null hypothesis is H_o: \mu = 4.

The alternate hypothesis is H_a: \mu \neq 4

The pvalue of the test is 0.0182 < 0.05, which means that there is sufficient evidence to show that the manufacturer needs to recalibrate the machines.

Step-by-step explanation:

A manufacturer must test that his bolts are 4.00 cm long when they come off the assembly line.

This means that the null hypothesis is that they are 4.00 cm long, that is:

H_o: \mu = 4

At the alternate hypothesis we test if it is different. So

H_a: \mu \neq 4

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

4 is tested at the null hypothesis:

This means that \mu = 4

After sampling 196 randomly selected bolts off the assembly line, he calculates the sample mean to be 4.14 cm.

This means that n = 196, X = 4.14

He knows that the population standard deviation is 0.83 cm.

This means that \sigma = 0.83

Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{4.14 - 4}{\frac{0.83}{\sqrt{196}}}

z = 2.36

Pvalue of the test and decision:

The pvalue of the test is the probability that the sample mean is different by at least 4.14 - 4 = 0.14 from the target value, which is P(|z| > 2.36), which is 2 multiplied by the pvalue of z = -2.36.

Looking at the z-table, z = -2.36 has a pvalue of 0.0091

2*0.0091 = 0.0182

The pvalue of the test is 0.0182 < 0.05, which means that there is sufficient evidence to show that the manufacturer needs to recalibrate the machines.

5 0
2 years ago
Other questions:
  • According to the general equation for conditional probability, if P(A, B) =4/7
    13·1 answer
  • Round 7,782 to the nearest ten hundread
    9·2 answers
  • Product of 1 5/6 - 5/15
    14·2 answers
  • Please answer this question!! 40 points and brainliest for sure!
    15·2 answers
  • What are three different whole numbers whose sum and product are the same
    15·1 answer
  • Two vehicles, a car and a truck, leave an intersection at the same time. The car heads east at an average speed of 30 miles per
    12·1 answer
  • Figure 2 was constructed using figure 1. For the transformation to be defined as a rotation, which statements must be true? Sele
    12·1 answer
  • I need help with a 7th grade math problem
    12·1 answer
  • Drag each number to show whether or not it is a solution to the inequality shown.
    10·1 answer
  • Differentiate the equation to find the functions for <br> Velocity v= ds/dt
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!