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3 years ago

Circular fountain has 18cm base blueprints scale 3cm to 4 feet what is actual area of base after built

1 answer:

6 0

$\bf \cfrac{\stackrel{model~cm}{3}}{\stackrel{actual~ft}{4}}\qquad \qquad \cfrac{\stackrel{model}{18}}{\stackrel{actual}{a}}=\cfrac{3}{4}\implies \cfrac{18\cdot 4}{3}=a$

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A total of 20 quarters and nickels add up to $4.00. How many nickels are there?

mariarad [96]

Answer:

5 nickels

Step-by-step explanation:

You can setup and solve a system of equations, or you can solve by trial and error until you get the correct answer.

Here is the solution by trial and error.

If all 20 coins are quarters, the value is 20 * $0.25 = $5

That is too much value.

Let's try 16 quarters. 16 quarters are worth 16 * $0.25 = $4.

That is the correct value, but it is only with quarters, and only 16 of them.

We need fewer quarters than 16.

Try 12 quarters: 12 * $0.25 = $3.00

The number of nickels is: 20 - 12 = 8

8 nickels are worth 8 * $0.05 = $0.40

12 quarters and 8 nickels are worth $3.00 + $0.40 = $3.40

There are 20 coins, but the value is too low.

The number of quarters is between 12 and 16.

Try 14 quarters and 6 nickels:

14 * $0.25 + 6 * $0.05 = $3.50 + $0.30 = $3.80

We are closer to $4 but not there yet.

Try 15 quarters and 5 nickels.

15 * $0.25 + 5 * $0.05 = $3.75 + $0.25 = $4

The total value is $4 and there are 20 coins. This is the answer.

15 quarters and 5 nickels works.

Answer: 5 nickels

8 0

3 years ago

Brandon has 7/1/2gallon of paint. He plans on using 1/1/2 gallon on each room. How many rooms will he be able to paint.

SVETLANKA909090 [29]

7 because all the room contain 1//2 and Brandon has 7/1/2 i t pretty easy <span />

4 0

3 years ago

Simplify I know I spelled it wrong

givi [52]

Answer:A

Step-by-step explanation:

3 0

2 years ago

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Of the 114.2 million Americans who owned a TV, 94.2 million also owned a DVD player. What percent of those who owned a TV also o

Luda [366]

Answer:

82.5% Americans owned a TV also owned a DVD player .

Step-by-step explanation:

Formula

$Percentage = \frac{Part\ value\times 100}{Total\ value}$

As given

Of the 114.2 million Americans who owned a TV, 94.2 million also owned a DVD player.

Here

Part value = 94.2 million

Total value = 114.2 million

Putting all the values in the formula

$Percentage = \frac{94.2\times 100}{114.2}$

$Percentage = \frac{94200\times 10}{1142\times 10}$

$Percentage = \frac{942000}{11420}$

Percentage = 82.5 %

Therefore 82.5% Americans owned a TV also owned a DVD player .

3 0

3 years ago

Is this correct? pLeAsE lOoK aT tHe ImAgE bElOw!!! Have a great day!

Scrat [10]

Answer
False true false
Explanation plz give brainliest

3 0

3 years ago

Read 2 more answers