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Alex Ar [27]
4 years ago
6

Last Question...Please help if you can...(25 points if you answer this)

Mathematics
1 answer:
tresset_1 [31]4 years ago
5 0

Answer:

  • Annie- 17 hours, Brian- 3 hours

Step-by-step explanation:

Let the number of hours Annie travelled be a, and same of Brian be b

<u>Then we have</u>

  • a + b = 20
  • a = 5b + 2

<u>Substituting a in the first equation</u>

  • 5b + 2 + b = 20
  • 6b = 20 - 2
  • 6b = 18
  • b = 3

<u>Then finding a</u>

  • a = 20 - 3 = 17

<u>So the answer is:</u>

  • Annie- 17 hours, Brian- 3 hours
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Answer:

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Step-by-step explanation:

659-25=634

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Fill out the chart please!
jarptica [38.1K]

1. Mean of the data: 8

2. Median: 8

3. IQR = 4

4. Members that use the facility 10 days a month is: 2.

See reasons below.

<h3>What is the Mean, Median, and Interquartile Range of a Data?</h3>

Mean = sum of all values ÷ number of data values (easily solved using a dot plot

Median = middle value (easily found using a box plot).

Interquartile range (IQR) = Q3 - Q1 (easily found using a box plot).

1. Mean of the data: use the dot plot.

Reasoning: (3 + 3 + 5 + 6 + 6 + 7 + 8 + 8 + 8 + 9 + 10 + 10 + 11 + 12 + 14)/15 = 8

2. Median of the data set: Using the box plot, it is the value indicated by the vertical line that divides the box.

Median = 8

3. IQR = Q3 - Q1 = 10 - 6

IQR = 4

4. Members that use the facility 10 days a month, using the dot plot is: 2. 10 has 2 dots.

Learn more about the mean, median, and interquartile range on:

brainly.com/question/9821103

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4 0
2 years ago
Find f(3) for f(x)=−5x−2<br><br> A. -10<br><br> B. -15<br><br><br> C. 13<br><br><br> D. -17
Travka [436]

Answer:

f(3) = -17

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = -5x - 2

f(3) is x = 3

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em>:                    f(3) = -5(3) - 2
  2. Multiply:                               f(3) = -15 - 2
  3. Subtract:                              f(3) = -17
4 0
3 years ago
Find the area of a circle with radius, r = 6.5m . Give your answer rounded to 2 DP​
SashulF [63]

Answer:

A ≈ 132.73 m²

General Formulas and Concepts:

<u>Symbols</u>

  • π (pi) ≈ 3.14

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Geometry</u>

Area of a Circle Formula: A = πr²

  • <em>r</em> is radius

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

<em>r</em> = 6.5 m

<u>Step 2: Find Area</u>

  1. Substitute in variables [Area of a Circle Formula]:                                         A = (3.14)(6.5 m)²
  2. Evaluate exponents:                                                                                         A = (3.14)(42.25 m²)
  3. Multiply:                                                                                                             A = 132.732 m²
  4. Round:                                                                                                               A ≈ 132.73 m²
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3 years ago
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