MATHEMATICS
MIDDLE SCHOOL

Answer:

Markup:

1. The notation that is used to indicate how text should be displayed.

2. The percentage or amount by which a seller hikes up his buy-in price when determining his selling price.

3. An increase in price.

Markdown:

1. A reduction in price in order to stimulate sales.

2. An decrease in price.

MIDDLE SCHOOL

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Answer:

y + 12 = 3(x - 2)

Step-by-step explanation:

Insert the coordinates into the formula with their CORRECT signs. Remember, in the Point-Slope Formula, y - y₁ = m(x - x₁), all the negative symbols give the OPPOSITE term of what they really are. Since both lines contain have to have similar rate of changes [slopes], we do not go any further.

MIDDLE SCHOOL

Knots are a unit of speed used for sailing. 1 knot is equal is equal to 1.2 miles per hour. Jesse trapped 15.0 miles by boat in 2.5 hours. What is speed in knots?? Be sure to include units.

Answer:

6 miles an hour or 5 knots

Step-by-step explanation:

this is the answer because 15 divided by 2.5 = 6 and 6 times 2.5 is 15 so the answer to miles per hour is 6 and if you multiply 1.2 by 5 you get 6 why 1.2 because each knot is worth 1.2 miles an hour.

HIGH SCHOOL

There are 7 coins that look identical.One of the seven coins weighs slightly less than the other 6. Using a balance scale, how could you determine which is the lightest coin in just 2 weighings?

Start by putting two coins on each side of the scale. If one side is higher, then the light coin must be in that pair (use a second weighing to determine which of that pair is the lightest.)

If the initial weighing shows the two pairs to be even, discard those four and go to the three others. Put two of the coins on the scale - one on each side. If one side stays higher, that coin is your light one. If however they are equal, the final unweighed coin must be the lighter coin.

If the initial weighing shows the two pairs to be even, discard those four and go to the three others. Put two of the coins on the scale - one on each side. If one side stays higher, that coin is your light one. If however they are equal, the final unweighed coin must be the lighter coin.

COLLEGE

Aubra and Tony are rounding the number 1.65 to the nearest tenth. On a number line they see 1.65 is exactly halfway between 1.6 and 1.7. Aubra says to round to the greatest value, 1.7. Tony says because it is in the middle, you can round to either value. Who is right? Explain.

The rounding of a number 1.65 nearest to the tenth will be 1.7. Then Tony is correct.

What is the rounding of a number?The action of forming anything into a circle. Mathematics. the act of substituting a number with one that is roughly equivalent in value but has fewer digits: To the closest dollar, rounding $27.68 results in $28. a comparable procedure that identifies one of several rules.

Aubra and Tony are rounding the number 1.65 to the nearest tenth. On a number line they see 1.65 is exactly halfway between 1.6 and 1.7. Aubra says to round to the greatest value, 1.7.

If the second place after the decimal is more than 5, then the first place after the decimal will be increased by one.

The rounding of a number 1.65 nearest to the tenth will be 1.7. Then Tony is correct.

More about the rounding of a number link is given below.

brainly.com/question/19031319

#SPJ2

Aubra is correct because if the place you are round is less then 4, you keep it the same but if it is 5 or higher, you round it up.

5 or more? Raise the Score

4 or less? Let it Rest

Hope this helps!

5 or more? Raise the Score

4 or less? Let it Rest

Hope this helps!

COLLEGE

What is the distributive property to express 64+24

(60+4)+(20+4)

this is because distributive property is the breaking down of a number or equation.

this is because distributive property is the breaking down of a number or equation.

MIDDLE SCHOOL

A cubic yard of topsoil weights 4,128 pounds. About how many 50-pound bags of topsoil can you fill with one cubic yard of topsoil?

About 80 cubic yards of topsoil

MIDDLE SCHOOL

How much is 2/3 of 9 marbles

First off, 9 divided by 3=3. 2/3 would be multiplying 3x2. 2/3 of 9 marbles would be 6. I hope that helps. :)

HIGH SCHOOL

A political analyst found 43% of 300 randomly selected republican voters feel that the federal government has too much power. Find the 95% confidence interval of the population proportion of republican voters who feel this way.

Answer:

Step-by-step explanation:

We want to determine 95% confidence interval of the population proportion of republican voters who feel that the federal government has too much power.

43% of 300 randomly selected republican voters feel that the federal government has too much power. This means that

p = 43/100 = 0.43

q = 1 - p = 1 - 0.43 = 0.57

n = 300

mean, u = np = 300 × 0.43 = 129

Standard deviation, s = √npq = √129×0.57 = 8.575

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

129 +/- 1.96 × 8.575/√300

= 129 +/- 0.9704

= 129 +/- 0.9704

The lower end of the confidence interval is 129 - 0.9704 =128.0296

The upper end of the confidence interval is 129 + 0.9704 =129.9704

Therefore, with 95% confidence interval, the mean of the population proportion of republican voters who feel that the federal government has too much power is between 128.0296 and 129.9704

MIDDLE SCHOOL

For a normal distribution what percentage of data falls within one standard deviation of the mean

Answer:

For a normal distribution 68% of data falls within one standard deviation from mean on both sides of mean

Step-by-step explanation:

A normal distribution's graph is a bell shaped curve that is completely described by its mean and standard deviation. Standard deviation is measured in terms of distance from mean.

34% of data is covered in one standard deviation from mean on one side.

Therefore, for a normal distribution 68% of data falls within one standard deviation from mean on both sides of mean ..