Questions in Grade High-school

Questions in Grade High-school

[Homework Help] It takes Tom 1 hour to lay 30 bricks. He has to lay 180 bricks. Tom starts to lay the bricks at 9 a.m. He has a half-hour break at 11 a.m. He has another half-hour break at 1 p.m. What time should Tom finish laying the 180 bricks?

[Homework Help] Consider the quadratic equation \( y = -3x^2 - 2x + 4 \). A. Find the value of the discriminant. B. How many real roots does the equation have? C. Does the vertex of the graph of the equation lie above, on, or below the x-axis?

[Homework Help] Which of the following is correct concerning the Km of an enzyme? A. It depends on the dissociation constant for the product of the reaction. B. It defines the Vmax of the enzyme-catalyzed reaction. C. It is a measure of the number of substrate molecules converted to product in a specific unit of time. D. It is the substrate concentration at which the velocity of the reaction is equal to 1/2 Vmax. E. It is measured in units of moles per minute.

[Homework Help] An accurate clock shows exactly 3:00 PM. In how many minutes will the minute hand catch up with the hour hand?

[Homework Help] Solve \(\frac{4}{x + 1} - \frac{1}{x} = 1\) over the real numbers.

[Homework Help] Organized labor would have supported which of the following demands in the "Omaha Platform" of the Populist Party in the 1892 election? A. An increase in currency resulting from the free and unlimited coinage of silver B. Government ownership of railroads C. 8-hour workday D. Graduated income tax E. Direct election of senators

[Homework Help] You got the following scores on 3 tests: 84, 82, 98. What score must you get on the 4th test if you want to average a 90% for the 4 tests? A. 94 B. 95 C. 96 D. 97 E. 98

[Homework Help] A substance releases heat when it changes from: a. liquid to solid b. solid to gas c. liquid to gas d. solid to liquid

[Homework Help] Which of the following linear equations, when graphed on a coordinate grid, has the steepest slope? A. [tex]y = \frac{1}{4}x - 7[/tex] B. [tex]y = \frac{7}{3}x - 2[/tex] C. [tex]y = 9x + \frac{2}{3}[/tex] D. [tex]y = 6x + \frac{5}{9}[/tex]

[Homework Help] Which element reacts spontaneously with 1.0 M HCl(aq) at room temperature? 1. Copper 2. Gold 3. Silver 4. Zinc