Solve the equation.2r + 3 = 21
A. 16
B. 7
C. 20
D. 9
Answer: D
You might also like to view...
Solve the problem.How many 5-card poker hands consisting of 2 aces and 3 kings are possible with an ordinary 52-card deck?
A. 24 B. 12 C. 288 D. 6
Use the definition to find an expression for the instantaneous acceleration of an object moving with rectilinear motion according to the given function. The instantaneous acceleration is defined as the instantaneous rate of change of the velocity with respect to time. s = 7t4 - 7t2 + 3[s is the displacement. Find v, then find a]
A. 84t2 - 14t B. 84t2 - 14 C. 28t3 - 14t D. 28t2 - 14
Find the indicated sum.-5 + -11 + -17 + -23 + . . . + a30
A. -2850 B. -2760 C. -2754 D. -185
Solve the problem.The hydrogen ion concentration of a substance is about 4.2 × 10-6 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 6.6 B. -6.6 C. 5.7 D. 5.4