Solve the problem.A merchant has coffee worth $30 a pound that she wishes to mix with 20 pounds of coffee worth 
a pound to get a mixture that can be sold for 
a pound. How many pounds of the 
coffee should be used?
A. 30 pounds
B. 10 pounds
C. 5 pounds
D. 15 pounds
Answer: B
You might also like to view...
Write an algebraic expression, using x as the variable.1.9 less than some number
A. x + 1.9 B. 1.9 - x C. 1.9x D. x - 1.9
Determine whether the statement is true or false. ? In using the trapezoidal rule, the number of subintervals n must be even.
What will be an ideal response?
The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.16 psi, what is its altitude?
?
?
Please round your answer to the nearest foot.
?
__________ ft
Fill in the blank(s) with the appropriate word(s).
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.Seven times a number added to -4, subtracted from triple the sum of eight times the number 
A. (-4 + 7x) - 3(8x - 7); 17 - 17x B. 7(x - 4) - (3 + 8)(x - 7); 49 - 4x C. 3(8x - 7) - (-4 + 7x); -17 + 17x D. (3 + 8)(x + -7) - 7(x - 4); -49 + 4x