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tangare [24]
3 years ago
5

6. If f(x) = –8 – 5x, what is f(–4)? f(–4) = 12 f(–4) = –28 f(–4) = –12 f(–4) = 28

Mathematics
2 answers:
ELEN [110]3 years ago
8 0

For this case we have a function of the form:

y = f (x), where:

f (x) = - 8-5x

We want to know the value of the function when x = -4, that is, f (-4).

Substituting we have:

f (-4) = - 8-5 (-4)

We have by law of multilplication of signs that:

- * - = +\\f (-4) = - 8 + 20

Different signs are subtracted and the sign of the major is placed.

f (-4) = 12

Answer:

Option A

Ivan3 years ago
7 0

Answer:

f (-4) = 12.

Step-by-step explanation:

If f(x) = –8 – 5x, what is f(–4)?

substitute -4 to ur value of x

that is f(-4)= -8 -5(-4)

f(-4) = -8+20

f(-4) =12.

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There are three executives in an office, ages 56, 57, and 58. If a 57-year-old executive enters the room, the
vova2212 [387]

Answer:

option (c) The mean age will stay the same but the variance will decrease

Step-by-step explanation:

Case I: For 3 executives of ages 56, 57 and 58

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Mean = \frac{\textup{56 + 57 + 58 }}{\textup{3}}

or

Mean = 57

Variance = \frac{\sum{(Data - Mean)^2}}{\textup{n-1}}

or

Variance = \frac{(56 - 57)^2+(57-57)^2+(58-57)^2}{\textup{3-1}}

or

Variance = \frac{1+0+1}{\textup{2}}

or

Variance = 1

For Case II: For 4 executives of ages 56, 57, 58 and 57

Number of executives, n = 4

Mean = \frac{\textup{56 + 57 + 58 + 57 }}{\textup{4}}

or

Mean = 57

Variance = \frac{\sum{(Data - Mean)^2}}{\textup{n-1}}

or

Variance = \frac{(56 - 57)^2+(57-57)^2+(58-57)^2+(57-57)^2}{\textup{4-1}}

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3 0
3 years ago
You are planning to put a new digital flat t.v on a wall that is 12ft long and 9ft high. the digital t.v has a diagonal of 72 in
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Diagonal of TV = 72 " = 6 ft


x^2+(2x)^2=6^2
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3 years ago
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Answer:

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A probability is the number of desired outcomes divided by the number of total outcomes.

In this question, the order of the numbers is not important. So we use the combinations formula to solve this question.

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7 0
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