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3 years ago

If 7 people ride a roller coaster 5 times and it is $3 per person pre ride what is the total price they paid for the rides

Mathematics

1 answer:

koban [17]3 years ago

5 0

If 7 people paid $3 per ride and road 5 times, it would be $21 dollars. You could do it 3×5=15+7=21

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Mr. Ahmed has 9 water heaters for his apartment buildings. each heater weighs 32 kilograms. How many grams do all 9 water heater

iris [78.8K]

Multiply 32X 9 = 288kg

they asked you to convert the kilograms to grams so divide the 288kg by a 1000= 0.288grams

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3 years ago

Show that the following functions are probability density functions for some value of k and determine k. Then, determine the mea

lord [1]

Answer:

a) 17.5

b) 15.6

c) 13.3

d) 21.51

Step-by-step explanation:

The given function is equal to:

f(x)=kx^2

where

$\int\limits^y_0 {kx^{2} } \, =1$

where y=23

Clearing k=0.00025

a) $Ex=\int\limits^y_0 {xf(x)} \, dx =\int\limits^y_0 {x*0.00025x^{2} } \, dx =17.5$

b) $Vx=Ex^{2} -(Ex)^{2} =\int\limits^y_0 {x^{2}f(x) } \, dx-17.5^{2} =\int\limits^y_0 {x^{2} *0.00025x^{2} } \, dx -17.5^{2} =321.82-306.25=15.6$

c) The function is equal to:

f(x)=k(1+2x)

$\int\limits^y_0 {k(1+2x)} \, =1$

where y=20

k=0.0024

$Ex=\int\limits^y_0 {xf(x)} \, dx =\int\limits^y_0 {x*0.0024(1+2x)} \, dx =13.3$

d) $Vx=Ex^{2} -(Ex)^{2} =\int\limits^y_0 {x^{2} f(x)} \, dx -13.3^{2}=\int\limits^y_0 {x^{2} *0.0024(1+2x)} \, dx-13.3^{2} =198.4-176.89=21.51$

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3 years ago

Which expression simplies to 40x10?

LuckyWell [14K]

Answer:

i think its 4*1

Step-by-step explanation:

hope this helps

have a great day

~Zero~

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2 years ago

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Sara receives her cell phone bill on the first day of each month. This month, she exceeded her allowed number of minutes for the

Tamiku [17]

In a short answer, to find average you need to add it all up and divide by the number of things you added. Ex. say I want to find the average for my english class, my grades are 90, 98, 100, 87, and 70. I would start by adding them up to get 445. then since i have 5 grades, i would divide the sum 445 by 5 and get an 89 as my average.

(Everything in this answer is example only, not my real grades.)

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3 years ago

Michaela picked seven times as many apples at Kate picked. Write an expression to show how many apples Michaela picked.

VladimirAG [237]

Answer:

Step-by-step explanation:

Let the number of apples picked by Kate be x

So the number of apples picked by Michaela is 7x

Plz mark it as brainliest:)

3 0

3 years ago

Read 2 more answers