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3 years ago

9

A boat traveled 84 miles downstream and back. The trip downstream took 4 hours. The trip back took 28 hours. Find the speed of t

he boat in still water and the speed of the current.

1 answer:

Lesechka [4]3 years ago

6 0

84 divided by 4 =21 , 21x28=588 , so 588 is the speed of the current

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9 1/2 divided by 3 7/10

OleMash [197]

Solution:

<u>Convert the fractions into improper fractions and solve.</u>

9 1/2 ÷ 3 7/10
=> 19/2 ÷ 37/10
=> 19/2 x 10/37
=> 19 x 5/37
=> 95/37

<u>Convert the fraction into mixed fraction (Not required):</u>

=> 95/37 = 37/37 + 37/37 + 21/37
=> 1 + 1 + 21/37
=> 2 + 21/37
=> 2 21/37

The solution to the problem is 2 21/37.

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1 year ago

Read 2 more answers

Please help thank you!

kotegsom [21]

Answer:

Note that $PQ + QR = PR$ :

Once:

$PR = 15x-11\\PQ=3x+6$

$PQ + QR = PR\\\\(3x+6)+QR=(15x-11)\\\\QR=(15x-11)-(3x+6)\\\\QR=15x-11-3x-6\\\\QR=12x-17\\$

Therefore, the answer is letter B

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3 years ago

Which is the better buy, 6 ballpoint pens for $4.80 or 8 for $6.48? Explain how you got your answer.

Paha777 [63]

Answer:

6 ballpoints pens is the better buy

Step-by-step explanation:

$4.80 x 6 = $28.80

$6.48 x 8 = $51.84

It's cheaper

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2 years ago

To ride a roller coaster, a visitor must not be less than 60 inches tall.

True [87]

<h2><em>h≥60</em></h2>

This is saying that your height has to be equal to or greater than 60 inches.

7 0

2 years ago

The money collected from selling bacon at a butcher store is given by the function f(x) = 3.55x – 4, where f(x) is the sales rev

Helga [31]

Answer:

See below under "Explanation".

General Formulas and Concepts:
<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Algebra I</u>

Functions

Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify given.</em>

<em /> $\displaystyle f(x) = 3.55x - 4$

$\displaystyle x = \{ 17, 21, 24, 34 \}$

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

To find the <em>profit</em> the store makes each day, we <em>input</em> the number of customers that visited the store each day into our given function:

For the day that had 17 customers:

$\displaystyle\begin{aligned}f(17) & = 3.55(17) - 4 \\& = 60.35 - 4 \\& = \boxed{56.35} \\\end{aligned}$

∴ the butcher store made $56.35 when <em>17 customers</em> visited the store.

For the day that had 21 customers:

$\displaystyle\begin{aligned}f(21) & = 3.55(21) - 4 \\& = 74.55 - 4 \\& = \boxed{70.55} \\\end{aligned}$

∴ the butcher store made $70.55 when <em>21 customers</em> visited the store.

For the day that had 24 customers:

$\displaystyle\begin{aligned}f(24) & = 3.55(24) - 4 \\& = 85.2 - 4 \\& = \boxed{81.2} \\\end{aligned}$

∴ the butcher store made $81.20 when <em>24 customers</em> visited the store.

For the day that had 34 customers:

$\displaystyle\begin{aligned}f(34) & = 3.55(34) - 4 \\& = 120.7 - 4 \\& = \boxed{116.7} \\\end{aligned}$

∴ the butcher store made $116.70 when <em>34 customers</em> visited the store.

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Learn more about functions: brainly.com/question/27710450

Learn more about Algebra I: brainly.com/question/27710380

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Topic: Algebra I

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2 years ago