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
Lynna [10]
3 years ago
10

Will GiVE BRAINLIEST!!!!

Mathematics
1 answer:
Usimov [2.4K]3 years ago
7 0

Answer

$3

Step-by-step explanation:

To find the x value, you want to cancel out the y terms in the equations. To do so, multiply (2x+5y=6) by 2, and (-x+2y=-3) by -5. This gives you

4x+10y=12

5x-10y=15

You can then cancel out the y terms and add the other terms from the 2 equations together to make

9x=27

You then divide 27 by 9 to get 3 as the value for x.

You might be interested in
The data given to the right includes data from ​candies, and of them are red. The company that makes the candy claims that ​% of
Dafna1 [17]

Using the z-distribution, the 95% confidence interval for the percentage of red candies is of (7.84%, 33.18%). Since 33% is part of the interval, there is not enough evidence to conclude that the claim is wrong.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96.

Researching this problem on the internet, 8 out of 39 candies are red, hence the sample size and the estimate are given by:

n = 39, \pi = \frac{8}{39} = 0.2051

Hence the bounds of the interval are:

  • \pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2051 - 1.96\sqrt{\frac{0.2051(0.7949)}{39}} = 0.0784
  • \pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2051 + 1.96\sqrt{\frac{0.2051(0.7949)}{39}} = 0.3318

As a percentage, the 95% confidence interval for the percentage of red candies is of (7.84%, 33.18%). Since 33% is part of the interval, there is not enough evidence to conclude that the claim is wrong.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

7 0
2 years ago
In speed skating, the distance of 10,000 meters consists of 25 laps. A skater sets the
xxMikexx [17]

Answer:

B) -0.4 seconds

Step-by-step explanation:

Laps: 25

Goal: -10 seconds to all 25 laps combined (10 seconds difference => -10)

divide by total laps

-10 /25 = -0.4s difference each lap

6 0
3 years ago
so far , a storm has traveled 35 miles in 1/2 hour. if its currently 5:00pm and the storm is 105 miles away from you , at what t
SVETLANKA909090 [29]

Answer:

hey do you want money if yes then tell me I will give you 1000$

6 0
3 years ago
A function, F(x), is shown below.
Maksim231197 [3]

Answer:

  range of f(x) = [-4, -2) ∪ [2, 8)

  a+b+c+d = -4

Step-by-step explanation:

The graph is attached. The range is the vertical extent of the function. It is defined at f(0) = -4 and f(2) = 2.

The limits f(2-) and f(4-) are -2 and 8, respectively, so the graph has open circles there. These are the ends of the two half-open intervals that make up the range of the function.

The portion of the graph in the domain [4, 7) is included in the range [2, 8), so no special treatment is needed for that piece of the function.

7 0
3 years ago
Solve for x<br> A) 36<br> B) 54<br> C) 72<br> D) 84 <br> Ayo help a girl out
kykrilka [37]

Answer:

72°

Step-by-step explanation:

This is called an isosceles triangle. This means that the 2 angles related to the equal sides, are also equal. Hence, the answer is 72°

6 0
3 years ago
Read 2 more answers
Other questions:
  • A ball is thrown from 4 feet off the ground with a vertical velocity of 30 feet per second. Write an equation to model the heigh
    15·1 answer
  • The length of a rectangle is 3 inches longer than it is wide. If the 46 inches what are the dimensions of the rectangle
    7·1 answer
  • Is radical 3 times radical 3 equals to radical 9? Yes/No
    7·2 answers
  • predict the percentage of high school students who​ smoke, assuming that 25 25​% of adults in the region smoke. Use 25 25​, not
    14·1 answer
  • What happens to a sample of matter when its particles lose kinetic energy?
    8·1 answer
  • On Friday, March 16th, Bob Smith's beginning checking balance is $50 and his account is credited for a deposit of $100. That sam
    6·2 answers
  • Please solve!!! <br> In a hurry!
    12·1 answer
  • PLEASEE HELP IM BEGGING YOU
    11·2 answers
  • Please help will give brainliest
    15·1 answer
  • Please helppppp
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!