How was the defeat of Germany and Japan helped by government control of economic production?

True or False: Given any real number r and any

$$3 \times 3$$

matrix A whose entries are all nonzero, it is always possible to change at most one entry of A to get a matrix B with det(B) = r.

Use a graphing utility to graph the function and determine whether it is even, odd, or neither. $f(x)=3 x-2$

After the Mongols conquered China, what aspects of Chinese life did not change?

What were Germany's gains and losses during the early years of the war?

What might have happened to the Song Dynasty had handguns been invented in the 12th century rather than the 13th century?

What were Germany's gains and losses during the early years of the war?

Determine whether the study depicts an observational study or an experiment. Seventh-grade students are randomly divided into two groups. One group is taught math using traditional techniques ; the other is taught math using a reform method. After 1 year, each group is given an achievement test to compare proficiency.

A simple random sample of size n is drawn. The sample mean, $\bar{x}$, is found to be 18.4, and the sample standard deviation, s, is found to be 4.5.

Construct a 95% confidence interval for $\mu$ if the sample size, n is 35.

Identify the vertex and the y -intercept of the graph of each function. $y=(x-125)^{2}+125$

Solve each matrix equation. If an equation cannot be solved, explain why.

$$\left[\begin{array}{cc}{0} & {-4} \\ {0} & {-1}\end{array}\right] X=\left[\begin{array}{l}{0} \\ {4}\end{array}\right]$$

The art teacher bought $19$ sketchbooks for $\$2.98$ per book. What equation can be used to find the total cost of the sketchbooks?

A. $c = 19 \cdot \$ 2.98$

B. $\frac { 19 } { \$ 2.98 } = c$

C. $\$ 2.98 \cdot c = 19$

D. $\frac { \$ 2.98 } { 19 } = c$

Fill in the blank with an appropriate word, phrase, or symbol(s). If a sample is drawn in such a way that each time an item is selected, each item in the population has an equal chance of being drawn, the sample is called a(n) _ sample

Miguel is answering an e-mail from his friend Jorge. Answer Jorge's questions, saying that the people will have already done these things by the time indicated. Use the future perfect.

1. ¿Encontrarás un trabajo cuando te gradúes?
2. ¿Le comprarás un regalo a Maru cuando te paguen?
3. ¿Escribirá el Sr. Díaz una novela cuando se jubile?
4. ¿Harás los preparativos para ir a España cuando termine el año escolar (school year)?
5. ¿Llenará David la solicitud cuando llegue a la entrevista?
6. ¿Olvidaré a mi ex novia cuando me vaya de vacaciones?