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2 years ago

PLZ HELP TROLL ANSWERS GET REPORTED MAKE IT UNDERSTANDABLE Match each expression to its value.

Mathematics

1 answer:

lbvjy [14]2 years ago

3 0

Answer:

7-5 => 2
-7+5 => -2
-7-5 => -12
7-(-5) => 12

Step-by-step explanation:

Lets solve the expressions one by one

we can see that it is simple subtraction. A smaller number is being subtracted from a large number.

So the answer is 2

There are two numbers with different signs. When there is a number with plus and a number with minus both quantities are subtracted but the larger quantity determines the sign of the answer.

In this case, 7 is larger and has negative sign, the answer will be -2

When there are two numbers with minus sign they are added but the answer has the minus sign with it.

So the answer will be: -12

When minus is multiplied with minus it converts to positive

$= 7-(-5) = 7+5 = 12$

Hence,

7-5 => 2
-7+5 => -2
-7-5 => -12
7-(-5) => 12

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Answer:

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MissTica

Answer:

A) 99.7% of people have an IQ between 64 and 136.

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C) 16% of people have an IQ score greater than 112.

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The Empirical Rule tells us that, in a normal or 'bell-shaped' distribution, 68% of the data is one standard deviation from the mean, 95% of the data is two standard deviations from the mean, and 99.7% of the data is three standard deviations from the mean.

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