Express the statement as an algebraic expression.The sum of a 81 and a number
A. 81x
B. 81 + x
C. 81 - x
D. 81
Answer: B
You might also like to view...
Write the fraction in decimal form.
?
?
A. 0.1094375 B. 0.1859375 C. 0.0759375 D. 0.0859375 E. 0.0857375
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.Assume that the volume of the earth is 5 × 1014 cubic meters and the volume of a bacterium is 2.5 × 10-16 cubic meters. If the earth could be filled with bacteria, how many would it contain? (Round to one decimal place.)
A. 5.0 × 1031 bacteria B. 2.0 × 10-30 bacteria C. 2.0 × 1030 bacteria D. 5.0 × 10-31 bacteria
For the triangle with sides of lengths a, b, and c, find an expression for the semiperimeter s of the triangle.
What will be an ideal response?
Solve.In baseball, the average number of earned runs given up by a pitcher in 9 innings is the pitcher's earned run average (ERA). For example, if a pitcher allows 90 earned runs in 250 innings, his ERA is found by solving the proportion 
= 
. Find the ERA for a pitcher who gives up 99 earned runs in 229 innings. Round your answer to the nearest hundredth.
A. 20.82 B. 3.89 C. 11.00 D. 2.31