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3 years ago

A collection of 30 coins consists of dimes and nickels. The total value is $1. 95How many dimes are there?

Mathematics

2 answers:

Nonamiya [84]3 years ago

8 0

21 nickels and 9 dimes

Kazeer [188]3 years ago

3 0

9 dimes and 21 nickels

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How many moles are in a sample of 3.01 x 10^18 formula units of sodium hydroxide (NaOH)?

Lunna [17]

Step-by-step explanation:

We can use the formula to find the number of moles. As ,

$:\implies$ n = No. of particles/ N_A

$:\implies$ n = 3.01× 10¹⁸/6.022 × 10²³

$:\implies$ n = 1/2 / 10⁵

<h3>Hence the number of particles is 1/2 / 10⁵ </h3>

4 0

2 years ago

How do you solve -2(x + 3y) = 18

sergiy2304 [10]

solving equation in terms of x we get $x=-9-3y$

solving equation in terms of y we get $y=-3-1/3x$

Step-by-step explanation:

We need to solve the equation: $-2(x + 3y) = 18$

Solving the equation:

$-2(x + 3y) = 18\\-2x-6y=18$

Simplifying and finding value of x:

$-2x-6y=18\\-2x=18+6y\\-2x/-2=18/-2+6y/-2\\x=-9-3y$

We can simplify and find value of y as well:

$-2x-6y=18\\-6y=18+2x\\-6y/-6=18/-6+2x/-6\\y=-3-1/3x$

So, solving equation in terms of x we get $x=-9-3y$

solving equation in terms of y we get $y=-3-1/3x$

Keywords: Solving Equations

Learn more about Solving Equations at:

#learnwithBrainly

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2 years ago

The Georgia state constitution contains a bill of rights .which of these is Most likely the best entry in this section of Georgi

Pavlova-9 [17]

That would be the freedom of speech and the freedom of the press.

Both of these are without a doubt a center of political to the political system existing in the United States. They state that both the freedom of speech and the press is to be expressed freely. These rights are the key to the political discourse as they allow an honest conversation and exchange of opinion that is of paramount importance in democracy. People are free to express their opinions and through the press they gain the necessary information to make educated decisions about the burning political questions.

Hope this helps!

6 0

3 years ago

URGENT PLEASE HELP!!!

ycow [4]