Questions in mathematics

Questions in mathematics

[Done] Mr. Robinson has 20 students in his martial arts class. The ratio of boys to girls is 4:1. How many boys and girls are in Mr. Robinson's class? A. 15 boys, 5 girls B. 5 boys, 15 girls C. 16 boys, 4 girls D. 4 boys, 16 girls Which of the following equations is an example of the distributive property? A. (5)(3) = (3)(5) B. 5 + 3 = 3 + 5 C. (5)(1+2) = (5)(1) + (5)(2) D. 15 = 15

[Done] Joshua has to earn more than 92 points on the state test in order to qualify for an academic scholarship. Each question is worth 4 points, and the test has a total of 30 questions. Let [tex]x[/tex] represent the number of test questions. Which of the following inequalities can be solved to determine the number of questions Joshua must answer correctly? A. [tex]4x < 30[/tex] B. [tex]4x < 92[/tex] C. [tex]4x > 30[/tex] D. [tex]4x > 92[/tex]

[Done] Question 1: If Lynn can type a page in \( p \) minutes, what piece of the page can she do in 5 minutes? A. \(\frac{5}{p}\) B. \(p - 5\) C. \(p + 5\) D. \(\frac{p}{5}\) E. \(1 - p + 5\) Question 2: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together? A. 2 hours and 24 minutes B. 3 hours and 12 minutes C. 3 hours and 44 minutes D. 4 hours and 10 minutes E. 4 hours and 33 minutes

[Done] Simplify the expression: \[ \frac{\sin A - 2 \sin^3 A}{2 \cos^3 A - \cos A} \]

[Done] A cooking club has 12 members. How many ways can they select a president and vice president from among the members? A. 220 B. 66 C. 1320 D. 132

[Done] how do I solve this?

[Done] Jerry bought a bottle of perfume as a gift for his wife. The perfume cost $92 before tax. If the total price including tax was $98.90, find the tax rate.

[Done] What number is equivalent to \(\frac{3}{8}\)?

[Done] Divide 126 in the ratio 4:5.

[Done] In music, what does "allegro" mean?