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statuscvo [17]
3 years ago
6

Doug entered a canoe race. He rowed 3.5 miles in 0.5 hours. What is his average speed in miles per hour?

Mathematics
1 answer:
navik [9.2K]3 years ago
3 0
Wassup, since 0.5 hours is 30 minutes, which is half an hour, all you need to do to get your answer is multiply 3.5 by 2. Your answer is 7. I hope this answer was helpful.
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If you change this expression to a fraction, 7.25 will be : 20/7.25.
Amanda [17]

Answer: D The denominator

Step-by-step explanation: The denominator is always the bottom of your fraction.

3 0
3 years ago
yesterday Josh sold some boxes of greeting cards. today he sold seven boxes .if he sold 25 boxes in all , how many did he sell
Galina-37 [17]

If he sold 25 boxes in all and he sold 7 today then he would of sold 25 - 7 boxes yesterday. Josh sold 18 boxes yesterday.

Today = 7

Yesterday = 18

Total = 25

7 + x = 25, when x = Yesterdays sold boxes.

Hope this helps :)

7 0
3 years ago
Read 2 more answers
What mathematical question can we ask
lilavasa [31]
Be specific please!!!
5 0
3 years ago
You have 6L feet of fence to make a rectangular vegetable garden alongside the wall of your house, where L is a positive constan
nika2105 [10]

Answer:

A(max) = (9/2)*L² ft²

Dimensions:

x = 3*L feet

y  = (3/2)*L   ft

Step-by-step explanation:

Let call  "x"  and  " y " sides of the rectangle. The side x is parallel to the wall of the house then

Area of the rectangle is  

A(r) = x*y

And total length of fence available is 6*L f , and we will use the wall as one x side then, perimeter of the rectangle which is 2x  +  2y   becomes x + 2*y

Then

6*L  =  x + 2* y    ⇒ y  = ( 6*L - x ) /2

And the area as function of x is

A(x)  =   x* ( 6*L - x )/2

A(x)  = ( 6*L*x  - x² ) /2

Taking derivatives on both sides of the equation we get:

A´(x)  =  1/2 ( 6*L - 2*x )

A´(x)  =  0      ⇒      1/2(  6*L  - 2*x ) = 0

6*L - 2*x  = 0

-2*x  = - 6*L

x  =  3*L feet

And

y  = ( 6*L - x ) /2   ⇒  y  = ( 6*L - 3*L )/ 2

y = ( 3/2)*L feet

And area maximum is:

A(max)  =  3*L * 3/2*L

A(max)  = (9/2)*L² f²

4 0
3 years ago
Read 2 more answers
The probability distribution for the number of defects in a shipment of alarm clocks, based on past data, is given below. Find t
Kay [80]

Answer:

0.29

Step-by-step explanation:

Given :

n : ___ 0 _____ 1 ____ 2 ____ 3 ____ 4

P(n) : 0.82___ 0.11 ___0.04 _0.02 ___0.01

The expected number of defect in a shipment can be obtained using the expected value formula :

Expected value, E(X) = Σx*p(x)

Σx*p(x) = (0*0.82) + (1*0.11) + (2*0.04) + (3*0.02) + (4*0.01)

E(X) = 0.29

Hence, the expected number of defect in shipment is 0.29

3 0
2 years ago
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