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
Pani-rosa [81]
3 years ago
10

Please answer this correctly

Mathematics
1 answer:
Keith_Richards [23]3 years ago
4 0

Answer:

10 units

Step-by-step explanation:

Hansen walks two units down to the dry cleaners, and walks 8 units to the right to the radio tower. If you add the units together you get 10.

You might be interested in
A variable needs to be eliminated to solve the system of equations
____ [38]

Answer:

The first step would be to subtract the two equations.

3 0
2 years ago
Brewed decaffeinated coffee contains some caffeine. We want to estimate the amount of caffeine in 8 ounce cups of decaf coffee a
rusak2 [61]

Answer:

We would have to take a sample of 62 to achieve this result.

Step-by-step explanation:

Confidence level of 95%.

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Assume that the standard deviation in the amount of caffeine in 8 ounces of decaf coffee is known to be 2 mg.

This means that \sigma = 2

If we wanted to estimate the true mean amount of caffeine in 8 ounce cups of decaf coffee to within /- 0.5 mg, how large a sample would we have to take to achieve this result?

We would need a sample of n.

n is found when M = 0.5. So

M = z\frac{\sigma}{\sqrt{n}}

0.5 = 1.96\frac{2}{\sqrt{n}}

0.5\sqrt{n} = 2*1.96

Dividing both sides by 0.5

\sqrt{n} = 4*1.96

(\sqrt{n})^2 = (4*1.96)^2

n = 61.5

Rounding up

We would have to take a sample of 62 to achieve this result.

8 0
3 years ago
What is the length of segment CD question mark
blagie [28]

Answer:

CD = two square root of 10 end square root

Step-by-step explanation:

To find the length of a segment, use the distance formula. Substitute the order pairs for the endpoints of the segment. CD has the end points (-7, -4) and (-1, -2).

d = \sqrt{(y_2-y_1)^2 + (x_2-x_1)^2} \\\\d = \sqrt{(-4--2)^2 + (-7--1)^2} \\\\d = \sqrt{-2^2 + -6^2}\\\\d = \sqrt{4 + 36}\\\\d=\sqrt {40} = 2\sqrt{10}

8 0
3 years ago
X+1.793=2.42
Varvara68 [4.7K]
The right answer is
0.627
4 0
2 years ago
Solve for x. 15x + 6 = 10x + 21 x = -5 x = 5 x = 3 x = 5
klio [65]
Move all the x terms to one side and solve for x. 15x-10x=21-6 : 5x/5=15/5 : x=3
4 0
3 years ago
Other questions:
  • The length of a rectangle is two more than the width. the perimeter is 36cm. write a system of equations that could be used to d
    7·1 answer
  • Ben's Auto Dealer had a sale on Saturday for its new cars. By 10 a.m. 30% of the new cars had been sold. What decimal represents
    6·2 answers
  • On the 1st of January 2014, Carol invested some money in a bank account. The account pays 2.5% compound interest per year. On th
    15·1 answer
  • What is .368 written in expanded form?
    15·2 answers
  • An art teacher makes a batch of purple paint by mixing 3/4 cup red paint with 3/4 cup of blue paint. If she mikes 13 batches, ho
    7·2 answers
  • Can someone please help me with this algebra
    12·2 answers
  • California or Newyork?!?
    12·1 answer
  • Marco needs $57 to buy new basketball shoes. If Marco earns $3 per day working and already has $12 saved, which equation shows h
    7·1 answer
  • Explain why a + b = d.
    14·1 answer
  • Please helppp asappppp
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!