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3 years ago

Hey guys i need help plz will give brainlist

Mathematics

1 answer:

nadya68 [22]3 years ago

5 0

Step-by-step explanation:

Effective resistance in the 30Ω and 40Ω parallel circuit = 1 / (1/30 + 1/40) = 120/7 Ω.

20Ω + 10Ω = 30Ω

Effective resistance in the 50Ω and (20Ω + 10Ω) parallel circuit = 1 / (1/50 + 1/30) = 75/4 Ω.

Now we can add the resistances up:

Effective resistance for circuit

= 120/7 Ω + 75/4 Ω = 1005/28 Ω.

Hence I = V / R

= 9.0V / (1005/28 Ω) = 0.25A. (2s.f.)

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Amino has 3/4 of a bag of cat food, her cat eats 1/10 of a bag per week.

ohaa [14]

Answer:

The food will last 7.5 weeks.

Step-by-step explanation:

divide 3/4 and 1/10 you get 7.5

in fraction 15/2

simplified 7 1/2

HOPE THIS HELPS

7 0

3 years ago

Read 2 more answers

It takes 4 minutes to fil an empty aquarium to a depth of 2/4 meters. what is the unit rate in minutes per meter ? write your an

Kruka [31]

The unit rate in minutes per meter for filling the given aquarium to a depth of 2/4 meters will be 8 minutes per meter.

We have,

Time taken to fill an aquarium to a depth of $\frac{2}{4}$ m = 4 minutes,

So,

Time = 4 minutes,

And,

Depth = $\frac{2}{4}$ m,

Now,

The unit rate in minutes per meter,

So,

We will Now convert given depth fraction,

i.e.

Depth = $\frac{2}{4}$ = 0.5m,

So,

It takes 4 minutes to fill a half meter,

Then,

To fill a meter it will take = $\frac{4}{\frac{2}{4} }$ = 8 minutes

So,

The unit rate in minutes per meter is 8 minutes per meter.

Hence we can say that the unit rate in minutes per meter for filling the given aquarium to a depth of 2/4 meters will be 8 minutes per meter.

Learn more about unit rate click here

brainly.com/question/26059245

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5 0

1 year ago

On average the number of electronic keyboards sold in New York each year is 75,072, which is eight times the average number of e

ser-zykov [4K]

Answer:

9,384 electronic keyboards.

Step-by-step explanation:

Question asked:

How many electronic keyboards, on average, are sold each year in Alaska?

Solution:

Let number of electronic keyboards, on average, are sold each year in Alaska = $x$

Given:

The number of electronic keyboards sold in New York is eight times the average number of electronic keyboards sold each year in Alaska:-

On an average, keyboards sold in New York = 8 times that of Alaska

$75,072 = 8\times x\\ \\ 75,072=8x\\ \\ Dividing\ both \ sides\ by\ 8\\ \\ \frac{75072}{8} =\frac{8x}{8} \\ \\ 9384=x$

Therefore, 9,384 electronic keyboards, on average, are sold each year in Alaska.

6 0

3 years ago

Luke has 4 more than triples the number of model cars that Andrew has. Luke has 31 cars. How many cars does Andrew have? {Write

bija089 [108]

Answer:

Andrew has 9 cars

Step-by-step explanation:

Let's start by defining what our unknowns are and how to name them:

For the number of cars Andrew has: let's use the letter A

For the number of cars Luke has: let's use the letter L

Not write the first sentence in mathematical terms:

"Luke has 4 more than triples the number of cars that Andrew has."

L = 3 * A + 4

The second phrase results on a very simple equation since it just states the number of cars that Luke has:

L = 31

Now we can combine these two equations by replacing the variable "L" in the first equation with the second equation and then solve for A:

L = 3 * A + 4

31 = 3 * A +4

31 - 4 = 3 * A

27 = 3 * A

A = 27/3

A = 9

Therefore, Andrew has 9 cars.

3 0

3 years ago

Please help me on this.

JulijaS [17]

It would be 96 ft

Cos 30*2=60 and 6 yards=18ft and 18*2 is 36 so 36+60=96

7 0

3 years ago