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
OverLord2011 [107]
3 years ago
13

What is the answer for the first one

Mathematics
2 answers:
Rasek [7]3 years ago
7 0
I think the answer's 45
Goryan [66]3 years ago
6 0
So what You do is 40 +5= 45 and 45-5= 40 so the answer is 45
You might be interested in
the moon is approximately 240,000 miles from Earth what is the distance written in scientific notation​
Tom [10]

Answer:

2.4 x 10^5

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Help me please and thank you
posledela

Answer:

m∠N = 85°

Step-by-step explanation:

<u>Properties of a parallelogram</u>

  • opposite sides are parallel and equal in length
  • opposite angles are equal
  • interior angles that lie on the same side of the transversal are supplementary - their sum is 180°

Therefore,

m∠M + m∠N = 180°

⇒ 95° + m∠N = 180°

⇒ m∠N = 180° - 95°

⇒ m∠N = 85°

--------------------------------------------------------------------------------------

<u>Additional calculations</u>

m∠M = m∠P = 95°

m∠N = m∠L = 85°

MN = LP

ML = NP

5 0
2 years ago
A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What size sample should be obtain
Kamila [148]

Answer:

Step-by-step explanation:

Solution:-

- The sample size = n

- The Error of estimation, E = 0.04

- The confidence level, CI = 99%

a)

What size sample should be obtained when she uses previous estimate of p = 0.52​?

- We are given the sample proportion p = 0.52, the required sample size is a function of confidence value and error of estimation (E):

                 n = p*( 1 - p ) * (\frac{Z-critical}{E})^2

Where,

- The critical value of the confidence level = 99% would be:

           significance level ( α ) = 1 - CI = 1 - 0.99 = 0.01

           Z-critical = Z_α/2 = Z_0.005 = 2.575  

- The required sample size (n) can be calculated:

            n = 0.52*( 1 - 0.52 ) * (\frac{2.575}{0.04})^2\\\\n = 0.2304*(51.5)^2 = 611.0784

- Hence, the minimum required sample size (n) should be = 612 adults.  

b)

- If the preliminary estimate of proportion is missing or not given, we are to assume the proportion p = 0.5.

- Similarly, repeat the calculations for sample size (n) when p = 0.5

               n = 0.5*( 1 - 0.5 ) * (\frac{2.575}{0.04})^2\\\\n = 0.25*(51.5)^2 = 663.0625

- Hence, the minimum required sample size (n) should be = 664 adults.  

5 0
3 years ago
in 20 seconds a rollercoaster goes up a 100-meter hill then down 72 meters and back up a 48-meter rise how much higher or lower
azamat
The answer would be 22 nesters
5 0
3 years ago
Which point satisfies the system of equations y=3x-2 and y=-2x+3?<br><br>​
horrorfan [7]

Answer:

<h3>First line has y intercept -2 ( the blue line ) </h3><h3>Second line has y intercept 3 ( the red line )</h3><h3>The point where these two lines cross is "D"</h3>

3 0
3 years ago
Other questions:
  • What's the area for number 5 and 6
    15·1 answer
  • How does knowing the double 6+6=12 help solve the near double 6+7=13?
    10·1 answer
  • Luis rolled a number cube 60 times. He rolled the number 6 four times. Which is most likely the cause of the discrepancy between
    8·3 answers
  • All possible roots of x^3+7x^2-12x-18
    5·1 answer
  • What is the distance between the points?! round to the nearest tenth i need to show work
    6·1 answer
  • The actual distance between two cities is 135 km. The map scale is 1cm: 100 km. Find the map distance.
    5·1 answer
  • Can somebody help mee plzzzzzzzz
    12·1 answer
  • F(x)=lx-2l-4 i need the range of this in interval notation,ASAP LIKE RIGHT THIS SECOND I WILL PUT YOU AS A BRAINLEST&lt;3
    14·1 answer
  • In 1997 there were 11,012 licensed drivers over age 55 involved in fatal crashes. There
    12·1 answer
  • A shape is shown on the graph. Which of the following is a reflection of the shape?​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!