Questions in mathematics

Questions in mathematics

[Done] At a speed of 22 revolutions per minute, how long will it take a wheel of radius 10, rolling on its edge, to travel 10 feet? (Assume [tex]p = \frac{22}{7}[/tex], and express the answer to the nearest 0.1 second.)

[Done] The sum of two numbers is 15 less than twice the first number. Their difference is 5 less than twice the second number. Find the numbers.

[Done] In gym class, you run \(\frac{3}{5}\) mile. Your coach runs 10 times that distance each day. How far does your coach run each day?

[Done] The legs of a right triangle have lengths of 28 meters and 21 meters. The hypotenuse has a length of [tex]5x[/tex] meters. What is the value of [tex]x[/tex]?

[Done] Draw a line segment \(PQ\) of length 8 cm. Find \(\frac{1}{4}\) of \(PQ\) using a compass.

[Done] a) Solve [tex]4(y - 7) = 13[/tex]. b) Make [tex]t[/tex] the subject of the formula [tex]P = 4t - 3[/tex].

[Done] Solve, by factorizing, the equation: \[8x^2 - 30x - 27 = 0\]

[Done] If four-fifths of the 30 students in the class were present, how many students were absent?

[Done] What is 20.4 in tenths?

[Done] Suppose that a chemist is mixing two acid solutions, one with a 15% concentration and the other with a 25% concentration. Which of the following concentrations cannot be achieved by combining these solutions? A. 17% B. 20% C. 23% D. 29%