Questions in mathematics

Questions in mathematics

[Free] Himpunan penyelesaian dari pertidaksamaan \(|2x + 1| \leq 3\) adalah: a. \(-1 \leq x \leq 3\) b. \(-2 \leq x \leq 2\) c. \(-2 \leq x \leq 1\) d. \(-1 \leq x \leq 1\) e. \(0 \leq x \leq 1\) Tolong jelaskan caranya.

[Free] The sum of a number times 6 and 19 is at least -29.

[Free] A poster measures 38 cm across. If a photocopy machine is used to make a copy that is [tex]\frac{3}{5}[/tex] of the original size, what is the width of the copy?

[Free] Christina collects stamps. She has 47 stamps in all. She has 20 stamps from Europe. The number of African stamps is 2 times the number of Asian stamps. How many stamps from each of these three continents does she have?

[Free] Which ordered pair is the solution to the system of equations? \[ 2x + y = -8 \] \[ x - y = -4 \] A. \((-3, -2)\) B. \((-1, 3)\) C. \((1, 5)\) D. \((-4, 0)\)

[Free] Which ordered pair is the solution to the system of equations? \[ 2x - 5y = -5 \] \[ x + 2y = 11 \] A) (3, 4) B) (5, 3) C) (7, 2) D) (15, 7)

[Free] What is the value of \(134 + 2n^2\) when \(n = 6\)? A. 68 B. 98 C. 170 D. 206

[Free] Each paper clip is \(\frac{7}{8}\) of an inch long and each costs $0.03. If exactly enough paper clips are laid end to end to have a total length of 56 inches, what is the total cost of the paper clips?

[Free] What is the change in elevation from 134 feet below sea level to 29 feet above sea level? Possible choices are: A. -163 B. 163 C. -105 D. 105

[Free] Two students are preparing for a marathon. Hector ran 8 miles in 85 minutes. Mario ran 6 miles in 55 minutes. Who has the faster average speed?