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High School

Recent questions in High School

Efan Halliday 2021-01-19

Please, solve the system of equations: ${\begin{cases} 5 x + y = 14 \\ 2 x + y = 5 \end{cases}$

ediculeN 2021-01-19

A fair coin is flipped four times in a row independently. Let X denote the number of heads obtained. Plot the probability mass function ofthe random variable $X - 2$

Isa Trevino 2021-01-19

I am at work right now and i was told to post this questionagain. Please help. Question # 4:The distribution coefficient, k= (conc. In ligroin/conc. In water),between ligroin and water for solute A is 7.5. What weight of Awould be removed from a solution of 10 grams of A in 100 mL ofwater by single extraction with 100 mL of ligroin? What weight of Awould be removed by four successive extractions with 25 mL portionsof ligroin? How much ligroin would be required to remove 98.5 % ofA in a single extraction?

opatovaL 2021-01-19

Suppose that a batch of 100 items contains 6 that are defective and 94 that are non-defective. If X is the number of defective items in a randomly drawn sample of 10 items, find (a)P{X = 0} and (b) P {X > 2}.

foass77W 2021-01-19

In a truck-loading station at a post office, a small 0.200-kg package is released from rest a point A on a track that is one quarter of a circle with radius 1.60 m.The size of the packageis much less than 1.60m, so the package can be treated at aparticle. It slides down the track and reaches point B with a speed of 4.80 m/s. From point B, it slides on a level surface a distanceof 3.00 m to point C, where is comes to rest.
(a) What is the coefficient of kinetic friction on the horizontal surface?
(b) How much work is done on the package by friction as it slides down the circular arc from A to B?

floymdiT 2021-01-19

These three points are on the same line: (1,2,3),(2,4,−6),(−3,−6,x). Find x. Explain your answer fully.

alesterp 2021-01-19

Use the Limit Comparison Test to determine the convergence or divergence of the series.
$\sum_{n = 1}^{\infty} \sin \frac{1}{n}$

Ramsey 2021-01-19

Grandma Betty's recipe makes 6 cupcakes and uses $\frac{1}{3}$ of a cup of sugar. How many cups of sugar will it take to make 2 $\frac{1}{2}$ dozen cupcakes?
$a . 1 \frac{1}{2} \cup s$
$b . \frac{2}{3} \cup$
$c . \frac{3}{5} \cup$
$d . \frac{1}{9} \cup$

Globokim8 2021-01-19

Andreas buys a new ailboat fo $15,540. He estimates that the boat will depreciate by 5% each year. Which exponential function models this situation?

Reggie 2021-01-19

Convert the binomial probability to a normal distribution probability using continuity correction. P ( $x \leq 36$ ).

ruigE 2021-01-19

Factor the trinomial. Note that the coefficient of $x^{2}$ is not equal to 1. $4 x^{2} - 3 x = 10 .$

avissidep 2021-01-17

Find the inverse of the matrix using elementary matrices. $[[2, 0], [1, 1]]$

Suman Cole 2021-01-17

Fill in the bla?

An equation that expresses a relationship between two or more variables, such as $H = \frac{9}{10} (20 - a)$ is called a/an ? The process of finding such equations to describe real-world phenomena is called mathematical ? Such equations, together with the meaning assigned to the variables, are called mathematical ?

permaneceerc 2021-01-17

American automobiles produced in 2012 and classified as “large”; had a mean fuel economy of 19.6 miles per gallon with a standard deviation of 3.36 miles per gallon. A particular model on this list was rated at 23 miles per gallon, giving it a z-score of about 1.01. Which statement is true based on this information?

A) Because the standard deviation is small compared to the mean, a Normal model is appropriate and we can say that about $84.4 %$ of of large automobiles have a fuel economy of 23 miles per gallon or less.

Marvin Mccormick 2021-01-17

Solve the equation $\csc x - \sin x = \cot x \cos x$

Tahmid Knox 2021-01-17

Solve $\frac{(1 - \sin^{2} x)}{(c s c^{2} x - 1)}$

necessaryh 2021-01-17

Find the solution of limit $lim_{(x, y) \to 0, 0} \frac{\sqrt{x^{2} + y^{2}}}{x^{2} + y^{2}}$ by using the polar coordinates system.

Phoebe 2021-01-17

A new thermostat has been engineered for the frozen food cases in large supermarkets. Both the old and new thermostats hold temperatures at an average of $25^{\circ} F$ . However, it is hoped that the new thermostat might be more dependable in the sense that it will hold temperatures closer to $25^{\circ} F$ . One frozen food case was equipped with the new thermostat, and a random sample of 21 temperature readings gave a sample variance of 5.1. Another similar frozen food case was equipped with the old thermostat, and a random sample of 19 temperature readings gave a sample variance of 12.8. Test the claim that the population variance of the old thermostat temperature readings is larger than that for the new thermostat. Use a $5 %$ level of significance. How could your test conclusion relate to the question regarding the dependability of the temperature readings? (Let population 1 refer to data from the old thermostat.)
(a) What is the level of significance?
State the null and alternate hypotheses.
$H 0 : ?_{1}^{2} = ?_{2}^{2}, H 1 : ?_{1}^{2} > ?_{2}^{2} H 0 : ?_{1}^{2} = ?_{2}^{2}, H 1 : ?_{1}^{2} \neq ?_{2}^{2} H 0 : ?_{1}^{2} = ?_{2}^{2}, H 1 : ?_{1}^{2} < ?_{2}^{2} H 0 : ?_{1}^{2} > ?_{2}^{2}, H 1 : ?_{1}^{2} = ?_{2}^{2}$
(b) Find the value of the sample F statistic. (Round your answer to two decimal places.)
What are the degrees of freedom?
$d f_{N} = ?$
$d f_{D} = ?$
What assumptions are you making about the original distribution?
The populations follow independent normal distributions. We have random samples from each population.The populations follow dependent normal distributions. We have random samples from each population.The populations follow independent normal distributions.The populations follow independent chi-square distributions. We have random samples from each population.
(c) Find or estimate the P-value of the sample test statistic. (Round your answer to four decimal places.)
(d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis?
At the ? = 0.05 level, we fail to reject the null hypothesis and conclude the data are not statistically significant.At the ? = 0.05 level, we fail to reject the null hypothesis and conclude the data are statistically significant. At the ? = 0.05 level, we reject the null hypothesis and conclude the data are not statistically significant.At the ? = 0.05 level, we reject the null hypothesis and conclude the data are statistically significant.
(e) Interpret your conclusion in the context of the application.
Reject the null hypothesis, there is sufficient evidence that the population variance is larger in the old thermostat temperature readings.Fail to reject the null hypothesis, there is sufficient evidence that the population variance is larger in the old thermostat temperature readings. Fail to reject the null hypothesis, there is insufficient evidence that the population variance is larger in the old thermostat temperature readings.Reject the null hypothesis, there is insufficient evidence that the population variance is larger in the old thermostat temperature readings.

Carol Gates 2021-01-17

Solve the congruence $x^{20} - 1 \equiv 0 (m o d 61)$

amanf 2021-01-17

Label each of the following statements as either true or false.
The distinct congruence classes for congruence modulo n form a partition of Z.

1
…
2239
2240
2241
2242
2243
…
2358

Turning back to high school math can be essential to understand engineering tasks that you may encounter later. The high school math problems have all the basics that have good equations and answers, which will let you see things clearly. The list of high school math questions below will help you identify your weaknesses and find various solutions. Taking a look at high school math equations, you will see certain parts that can be applied to Physics. In either case, the best way is to learn by example, which is why high school math problems with answers will be essential.

High School