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
Colt1911 [192]
3 years ago
6

Help !!! 50 points for the right answer!!!!

Mathematics
2 answers:
mart [117]3 years ago
5 0
It doesn't give any answers? I think the first one is 14 the second one is -4 and the third one is 10
kap26 [50]3 years ago
3 0
A=(14,-6)\qquad B=(-4,7)\\\\\\\bold{u}=\overrightarrow{AB} =\left\ \textless \ -4-14,7-(-6)\right\ \textgreater \ =\left\ \textless \ -18,13\right\ \textgreater \ \\\\\\
||\bold{u}||=\sqrt{(-18)^2+13^2}=\sqrt{324+169}=\sqrt{493}\approx22,2
You might be interested in
The article "Students Increasingly Turn to Credit Cards" (San Luis Obispo Tribune, July 21, 2006) reported that 37% of college f
Sloan [31]

Answer:

Step-by-step explanation:

Hello!

There are two variables of interest:

X₁: number of college freshmen that carry a credit card balance.

n₁= 1000

p'₁= 0.37

X₂: number of college seniors that carry a credit card balance.

n₂= 1000

p'₂= 0.48

a. You need to construct a 90% CI for the proportion of freshmen  who carry a credit card balance.

The formula for the interval is:

p'₁±Z_{1-\alpha /2}*\sqrt{\frac{p'_1(1-p'_1)}{n_1} }

Z_{1-\alpha /2}= Z_{0.95}= 1.648

0.37±1.648*\sqrt{\frac{0.37*0.63}{1000} }

0.37±1.648*0.015

[0.35;0.39]

With a confidence level of 90%, you'd expect that the interval [0.35;0.39] contains the proportion of college freshmen students that carry a credit card balance.

b. In this item, you have to estimate the proportion of senior students that carry a credit card balance. Since we work with the standard normal approximation and the same confidence level, the Z value is the same: 1.648

The formula for this interval is

p'₂±Z_{1-\alpha /2}*\sqrt{\frac{p'_2(1-p'_2)}{n_2} }

0.48±1.648* \sqrt{\frac{0.48*0.52}{1000} }

0.48±1.648*0.016

[0.45;0.51]

With a confidence level of 90%, you'd expect that the interval [0.45;0.51] contains the proportion of college seniors that carry a credit card balance.

c. The difference between the width two 90% confidence intervals is given by the standard deviation of each sample.

Freshmen: \sqrt{\frac{p'_1(1-p'_1)}{n_1} } = \sqrt{\frac{0.37*0.63}{1000} } = 0.01527 = 0.015

Seniors: \sqrt{\frac{p'_2(1-p'_2)}{n_2} } = \sqrt{\frac{0.48*0.52}{1000} }= 0.01579 = 0.016

The interval corresponding to the senior students has a greater standard deviation than the interval corresponding to the freshmen students, that is why the amplitude of its interval is greater.

8 0
3 years ago
The opposite of 12 plus a number
dlinn [17]

Im pretty sure the answer is Twelve :))

6 0
2 years ago
Help please I'm stuck once again?​
Llana [10]

Answer:

The probe's final position is -143m

Step-by-step explanation:

Note that the words 'lowered' and 'below' mean subtract; while the word 'raised' means add. Thus, interpreting the statement to mathematical expression is done below.

- 90m + 50m - 138m + 35m

=  - 143m

Therefore, the probe's final position is -143m. Hence, the sensor is 143m below the sea level.

5 0
3 years ago
Please help me. I am having some trouble on this problem.
anyanavicka [17]

Answer:

Step-by-step explanation:

I don't know if we are supposed to use the numbers from the previous problem. If not, then what ever number you choose will be 7 times the size of the protein. So let's assume that the givens follow question 2.

The amount of protein = x

The amount of carbs = (700/100)*x

proteins + carbs = 100%

x + 7x = 100           Combine the left

8x = 100                 Divide by 8

8x/8 = 100/8

x = 12.5

Protein = 12.5  carbs

Carbs = 7*12.5 = 87.5 grams

So both cereals contain 12.5 grams of proteins and 87.5 grams of carbs.

5 0
3 years ago
Read 2 more answers
Any answers get 5 stars, Best answer gets brainliest!
Romashka [77]
B: Negative 9 and 3 over 6
4 0
3 years ago
Read 2 more answers
Other questions:
  • Find the ratio a:b, if 2a−b/6 = b/3
    5·1 answer
  • Picturing the way a volcano erupts to remember how a volcano functions is called
    8·2 answers
  • What is the solution to -1-7?
    7·2 answers
  • identify a two-digit dividend that will result in a quotient with a remainder 1 when the divisor is 4
    14·1 answer
  • X
    6·1 answer
  • 5 năm trước tổng số tuổi của hai mẹ con là 55 tuổi. Hiện nay tuổi con bằng 4/9 lần tuổi mẹ. Tính số tuổi của mẹ và tuổi con hiện
    14·1 answer
  • 8x − 4y = −16 <br> 3x + 15y = −6
    15·1 answer
  • What 2 divided by 15 ​
    9·2 answers
  • Hey can somebody help y+5=2(x+1)
    10·2 answers
  • How many gallons of a 80​% antifreeze solution must be mixed with 100 gallons of 20​% antifreeze to get a mixture that is 70​% a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!