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
Archy [21]
2 years ago
5

What is the gradient of the blue line? Need asap

Mathematics
2 answers:
kolbaska11 [484]2 years ago
7 0

Answer:

<u>-5</u>

Step-by-step explanation:

The points through which the line passes are :-

(-1, 0) and (-2, 5)

Slope (m) = 5 - 0 / -2 + 1

= 5 / -1

= -5

Dominik [7]2 years ago
5 0

Answer:

the gradient is -5/1 or -5 because it is a negative slope meaning you would go from top to bottom.

Step-by-step explanation:

mr clean

You might be interested in
Please help with this math problem
dlinn [17]
I think it’s a I’m not really sure but I think
7 0
3 years ago
The price of an item has been reduced by 95% the original price was 87$
tigry1 [53]

Answer:

Your answer

Price after reducing is 4.35$

Mark it as Brainlist. Follow me for more answer.

Step-by-step explanation:

4 0
2 years ago
If you multiply by 3 negatives does it equal a negative?
qwelly [4]

Yes it does because when u multiply 2 negative you get a positive but since your adding another negative it goes back to a negative

6 0
3 years ago
Men are believed to have a slightly longer average length of short hospital stays than women; 5.2 days versus 4.5 days respectiv
Georgia [21]

Answer:

Since our calculated value is lower than our critical value,z_{calc}=2.02, we have enough evidence to FAIL to reject the null hypothesis at 1% of singificance. So there is not nough evidence to conclude that mean for men it's significantly higher than the mean for female.

Step-by-step explanation:

1) Data given and notation  

\bar X_{1}=5.2 represent the mean for group men  

\bar X_{2}=4.5 represent the mean for group women  

Assuming these values for the remaining data:

\sigma_{1}=1.2 represent the population standard deviation for the sample men

\sigma_{2}=1.5 represent the population standard deviation for the sample women

n_{1}=32 sample size for the group men  

n_{2}=30 sample size for the group women  

z would represent the statistic (variable of interest)

p_v represent the p value  

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the mean for men it's higher than the mean for women, the system of hypothesis would be:  

H0:\mu_{1} \leq \mu_{2}  

H1:\mu_{1} > \mu_{2}  

If we analyze the size for the samples both are higher than 30, and we know the population deviation's, so for this case is better apply a z test to compare means, and the statistic is given by:  

z=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}} (1)  

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.  

3) Calculate the statistic  

We have all in order to replace in formula (1) like this:  

z=\frac{5.2-4.5}{\sqrt{\frac{1.2^2}{32}+\frac{1.5^2}{30}}}=2.02  

4) Find the critical value

In order to find the critical value we need to take in count that we are conducting a right tailed test, so we are looking on the normal standard distribution a value that accumulats 0.01 of the area on the right and 0.99 of the area on the left. We can us excel or a table to find it, for example the code in Excel is:

"=NORM.INV(1-0.01,0,1)", and we got z_{critical}=2.33

5) Statistical decision

Since our calculated value is lower than our critical value,z_{calc}=2.02, we have enough evidence to FAIL to reject the null hypothesis at 1% of significance. So there is not nough evidence to conclude that mean for men it's significantly higher than the mean for female.

6 0
3 years ago
Find all sets of four consecutive integers whose sum is between 95 and 105
Nat2105 [25]
Hello,

Let n-2,n-1,n,n+1 the foru numbers
s=n-2+n-1+n+n+1=4n-2

95<=4n-2<=105
==>97<=7n<=107
==>24.25<=n<=26.75
==>25<=n<=26
if n=25 s=98
if n=26 s=102
7 0
3 years ago
Other questions:
  • Pam is a wedding planner She is setting up a room to seat at least 100 guests. She has some tables that seat 10 people and some
    10·1 answer
  • I really need help pleasee!!
    5·1 answer
  • 3 more than 5 times the number of dogs in algebraic expression
    15·1 answer
  • Given: Lines y and z are parallel, and ABC forms a triangle.
    13·1 answer
  • 1. Kevin has 20 pieces of candy in a bag: 12 mint sticks, 3 jelly treats, and 5 fruit tart chews. If he eats one piece every 6 m
    7·1 answer
  • I need help please :( i really need help
    9·1 answer
  • Hayley has $155 in savings, and her brother Hank has $230. Hayley is saving $10 each week, and her brother is spending $15 each
    13·2 answers
  • Classify as specific as possible.
    5·2 answers
  • .The diameter of a bike wheel is 27 inches. If the wheel makes 15 complete rotations, how far does the bike travel?
    7·1 answer
  • The diagonal of a rectangular driveway is almost 12 feet. Which pair of dimensions is closest to the length and width of the dri
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!