Average speed = (distance final - distance initial)/(time final - time initial)
Average speed = (30-0)km /(100 -0)min = 3/10 km/min

3/10 km/min *60 min/1 h = 180/10 km/h= 18 km/h

7 0

3 years ago

On a blueprint, the scale indicates that 4 centimeters

makvit [3.9K]

Answer:

Length: 15 feet Width: 105 feet

Step-by-step explanation:

set up a proportion of x over 4 and x over 12 fill in the length or width that you do know. Then cross multiply and solve the simple equation you get: for example) 60 = 4x. Just divide both sides by 4 to get x by itself.

Hope this answered your question!

6 0

3 years ago

Question 7 of 10 What is the sum of the first five terms of a geometric series with a1 = 10 and r = 1/5?

enot [183]

Answer:

12.496

Step-by-step explanation:

$\text{Sum}=\frac{a*(1-r^n)}{1-r}\\\text{Here a=10, r=1/5, plugging them in the above formula we get}\\\text{Sum}=\frac{10*(1-(1/5)^5)}{1-(1/5)}\\\text{Sum}=\frac{1562}{125}=12.496$

5 0

3 years ago

What is the value of x in the equation 3X minus 4Y equals 65, when Y equals four

Vika [28.1K]

Answer:

Step-by-step explanation:

3x-4y=65

3x=65+4y

x=(65+4y)/3, when y=4

x=(65+4*4)/3

x=(65+16)/3

x=81/3

x=27

8 0

3 years ago

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