Fínd the number of standard devíations from the mean. Round your answer to two decímal places. 15) The test scores on the Chapter 6 mathematics test have a mean of 69 and a standard deviation of 12. 15) Andrea scored 88 on the test. How many standard deviations from the mean is that? A) 0.65 standard devíations below the mean C) 0.65 standard devíations above the mean B) 1.58 standard devíations below the mean D) 1.58 standard devíations above the mean

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Percentage

A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.

Algebraic Expressions

In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.

Numbers

Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.

Subtraction

Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.

Addition

Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.