Solve the problem.Chandra has 4 liters of a 45% solution of sodium hydroxide in a container. What is the amount and concentration of sodium hydroxide solution she must add to this in order to end up with 9 liters of 55% solution?

A. 5 L of 66% solution
B. 5 L of 64% solution
C. 5 L of 63% solution
D. 5 L of 61% solution


Answer: C

Mathematics

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Add.-18 + (-14)

A. -4 B. 4 C. -32 D. 32

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Provide an appropriate response.When solving a system of equations, you get x + 2 = x + 4. How many solutions are there?

A. Infinitely many B. One solution C. No solutions

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If the property tax on a $200,000 home is $2,830, what is the tax on a $150,000 home? Round to the nearest dollar.   ? $__________

Fill in the blank(s) with the appropriate word(s).

Mathematics

Simplify by using the order of operations. Round your answer to the nearest hundredth.27.9 - 2.1 ÷ 8.7 ? 48.1

A. 16.29 B. 1330.38 C. 0.06 D. 142.64

Mathematics