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Reptile [31]
3 years ago
6

Alvin wants to know what his average paddling rate was for a canoe trip to a campsite. On the way there it took him 7 hours agai

nst a river current of 2 km/hr. On the way back, the same distance took him 5 hours with the same 2 km/hr current. Let r= Alvin’s average paddling rate. Express the rates against the current and with the current in terms of r to complete the below table.

Mathematics
1 answer:
borishaifa [10]3 years ago
8 0
Whoa .. that’s a lot
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veronica howard
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3 years ago
Evaluate 8-2.<br>A. -16<br>B. -64<br>C. -1/64<br>D. 1/64<br> ​
makvit [3.9K]

I'm assuming you meant to write 8^(-2) or 8^{-2} where the -2 is the exponent over the 8.

If my assumption is correct, then we use the rule a^{-b} = \frac{1}{a^b}

So,

a^{-b} = \frac{1}{a^b}\\\\8^{-2} = \frac{1}{8^2}\\\\8^{-2} = \frac{1}{64}

<h3>Answer: Choice D.  1/64</h3>
8 0
2 years ago
Simplify (2x+1)^2<br><br><br><br>what is the answer? ​
Dmitry_Shevchenko [17]

Answer:

Step-by-step explanation:

4x^2+4x+1

3 0
3 years ago
Read 2 more answers
37. Two numbers are such that their
omeli [17]

Answer:

8 and 6

Step-by-step explanation:

Two numbers are such that their difference, their sum, and their product are to

each other as 1:7:24. Their product must equal what number?

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Two numbers a & b

Let x = the multiplier

:

a - b = 1x

a + b = 7x

a * b = 24x

:

Add the 1st two equations

a - b = x

a + b = 7x

2a = 8x

a = 4x

or

x = .25a

:

a * b = 24x

Replace 24x; a = 4x therefore:

a * b = 6a

b = 6

;

Using the 1st equation

a - b = 1x

Replace b with 6 and x with .25a

a - 6 = .25a

a - .25a = 6

.75a = 6

a =

a = 8

:

Find the multiplier

a - b = x

8 - 6 = 2

:

Check this

a - b = 2 (1*2)

a + b = 14; (7*2)

a * b = 48: (24*2)

:

The numbers are 8 and 6; their products = 48

4 0
3 years ago
If u can answer these please do
enot [183]

Answer:

1) 8.5x10^8

2) 5.3x10^-3

3) 9.95x10^12

Step-by-step explanation:

Since they have the same exponents, you just add or subtract and leave the rest the same.

1) 8.5x10^8

2) 5.3x10^-3

3) 9.95x10^12

8 0
2 years ago
Read 2 more answers
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