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2 years ago

15

Tihn can row at a rate of 6 mph in still water, it takes her 2 hours to row upstream from a dock to a park. She then rows back t

o the dock, and it only takes 40 minutes . What is the speed of the river current

1 answer:

nydimaria [60]2 years ago

5 0

Answer:

A. 3mph

Step-by-step explanation:

This is the answer for Edg 2020

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Match each mathematical expression with its simplified form.<br> (2 +9+4)<br> (3 + 1 + 4 + 8)

katen-ka-za [31]

Answer:

15 and 16

Step-by-step explanation: To get simplified form, you add the numbers in parentheses together. (2+9+4)= 15 and (3+1+4+8)=16

For problem 1. 2+9=11 11+4=15

For problem 2. 3+1=4 4+4=8 8+8=16

Hopefully this helped, and please add me as brainliest.

8 0

3 years ago

Is 4.55 and 1.23456 a rational number

kaheart [24]

Problem

Is 4.55 and 1.23456 a rational number

Solution

4.55 can be written as:

455/100 so then it could be a rational number

For the second number we have: 1.23456

And we can write this number as:

123456/100000

So then is also ratioanl

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8 months ago

Find the value of y

Artist 52 [7]

Answer:

64-degree ( Alternate angles)

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2 years ago

Read 2 more answers

The art club spent $45 on supplies for valentines to sell during lunches. They made 60 valentines. What selling price for a vale

Agata [3.3K]

I cannot help you sorry :/

4 0

2 years ago

Find \tan\left(\frac{17\pi}{12}\right)tan( 12 17π )tangent, left parenthesis, start fraction, 17, pi, divided by, 12, end frac

uranmaximum [27]

One way to do this is to notice

$\dfrac{17\pi}{12}=\dfrac\pi6+\dfrac{5\pi}4$

Then

$\tan\dfrac{17\pi}{12}=\tan\left(\dfrac\pi6+\dfrac{5\pi}4\right)=\dfrac{\tan\frac\pi6+\tan\frac{5\pi}4}{1-\tan\frac\pi6\tan\frac{5\pi}4}$

We have

$\tan\dfrac\pi6=\dfrac{\sin\frac\pi6}{\cos\frac\pi6}=\dfrac{\frac12}{\frac{\sqrt3}2}=\dfrac1{\sqrt3}$

and since $\tan x$ has a period of $\pi$ ,

$\tan\dfrac{5\pi}4=\tan\left(\pi+\dfrac\pi4\right)=\tan\dfrac\pi4=1$

and so

$\tan\dfrac{17\pi}{12}=\dfrac{\frac1{\sqrt3}+1}{1-\frac1{\sqrt3}}=\dfrac{1+\sqrt3}{\sqrt3-1}=2+\sqrt3$

7 0

3 years ago