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Nastasia [14]
3 years ago
12

when you list to music on an MP3 player, you turn it on and then program the player. Is programing the MP3 player and turning it

on commutative? Explain.
Mathematics
1 answer:
Nina [5.8K]3 years ago
8 0

Answer:

[See Below}

Step-by-step explanation:

✦ Communitive property just means opposite way of doing something but getting the same result.

  ✧ Ex: 3 + 2 = 2 + 3 (Both equal 5)

✦ In this case you are switching the order but you still get the same result, so Yes, It is communitive property.

~<em>Hope this helps Mate. If you need anything feel free to message me. </em>

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A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui
Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= \frac{dx}{dt}=1. 8 m/s

\triangle ABD\sim\triangle ECD

Therefore, \frac{AB}{EC}=\frac{BD}{CD}

\frac{y}{2}=\frac{12}{x}

xy=24

Differentiate w.r.t t

x\frac{dy}{dt}+y\frac{dx}{dt}=0

x\frac{dy}{dt}=-y\frac{dx}{dt}

\frac{dy}{dt}=-\frac{y}{x}\frac{dx}{dt}

When the man is 4 m from  the building

Then, we have x=12-4=8 m

\frac{dx}{dt}=1.8 m/s

Substitute the values in above equation then, we get

8y=24

y=\frac{24}{8}=3

Substitute the values then we get

\frac{dy}{dt}=-\frac{3}{8}\times 1.8=-0.675 m/s

Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

8 0
3 years ago
I need help someone help me please &lt;3
ElenaW [278]

Answer:

y=-\frac{3}{2}x-2

Step-by-step explanation:

using the y=mx+b equation, where m=slope and b=y-intercept, we can place our known slope and y-intercept to form our answer, y=-\frac{3}{2}x-2 :-) hope this helped!

4 0
3 years ago
Which picture shows the correct graph of |x|=5?
Marrrta [24]

|x| = 5

x = 5 or x = -5

You need a graph that has a closed dot on -5 and a closed dot on 5.

Answer: B. Picture B

4 0
3 years ago
I hate Ixl so much. but i need help
butalik [34]

Answer:y=2x-3

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Damien has 30 coins, all nickels and dimes. The total value of all these coins is $2.05. How many nickels does he have?
Damm [24]

Hi there!

nickels:19

We know that there is only nickels and dimes in his coin collection..

<u><em>1.Multiply two terms:</em></u>

<u><em /></u>10<u><em>·</em></u>10=1.00<u><em /></u>

<u><em>Then there would be 20 nickels but 1+1=2 not 2.05.</em></u>

<u><em>2.Multiply the terms:</em></u>

<u><em /></u>11<u><em>·</em></u>10=1.10<u><em /></u>

<u><em /></u>19<u><em>·</em></u>5=0.95<u><em /></u>

<u><em>3.Combine the two terms:</em></u>

<u><em /></u>1.10+0.95=2.05<u><em /></u>

Therefore, there would be 19 nickels...

<u><em /></u>

4 0
3 years ago
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