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katrin2010 [14]

4 years ago

15

doug entered a canoe race. he rowed 3 1/2 miles in 1/2 hour. what is his average speed in miles per hour?

2 answers:

Lady bird [3.3K]4 years ago

6 0

Average speed = total distance / total time...

s=3.5/0.5=7mph

rewona [7]4 years ago

3 0

3 1/2 miles = 7/2 miles
1/2 hours= 30 minutes
So,
In 30 mins, travelled 7/2 miles
In 1 min, travelled 7/2 ÷ 30= 7/2× 1/30 = (7×1)/(2×30) = 7/60 miles
In 60 mins, travelled (7×60)/60 miles = 420/60 miles = 7 miles.
Hence, the speed is 7 miles per hour. Anything else

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klio [65]

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3 years ago

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. Match each triangle below with the value

Dmitriy789 [7]

Answer:

30, 9, 15, 29

Step-by-step explanation:

Triangle 1, yellow

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8 0

4 years ago

Which is the better buy 4 muffins for 0.85 or 1dozen muffins for 2.50

kherson [118]

The dozen is 20cents per muffin while the 4 is 21 cents per muffin

3 0

3 years ago

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In 2008, the total trade between the United States and Japan was $2.04 x 101^1. The total trade between the U.S. And Australia w

jolli1 [7]

Answer:

6.21 times more

Step-by-step explanation:

Assuming 2.04 x 10^11 was only a typo

you would need to first equal the powers of 10

so 20.4 x 10^10 and 3.28 x 10^10

now that they have the same powers

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if it's asking for how many times i would approximate it to 6.21 times more

3 0

3 years ago

ASAP PLZZZ The axis of symmetry for the graph of the function f start bracket x end bracket equals one-quarter x square plus b x

Lilit [14]

Answer:

$b=-3$

Step-by-step explanation:

The given function is $f(x)=\frac{1}{4}x^2+bx+10$ .

When we compare to $ax^2+bx+=0$ , we have

$a=\frac{1}{4}$ and c=10

The equation of the axis of symmetry of a vertical parabola is:

$x=-\frac{b}{2a}$

Also from the question the axis of symmetry is x=6

We substitute the values to get:

$6=-\frac{b}{2*\frac{1}{4}}$

$6=-\frac{b}{\frac{1}{2}}$

$b=-\frac{1}{2}*6$

$b=-3$

7 0

3 years ago

Read 2 more answers