All categories

4 years ago

7/n = 2/3 what does n stand for

1 answer:

3 0

Set up like a proportion and cross multiply so you get:
2n = 21, then when you divide each side by 2 you get to equal 10.5

You might be interested in

What is 1 fourteenth as a decimal

nataly862011 [7]

1 14'th as a decimal would be 1/14 or 0.0714 (rounded to the nearest ten thousandth)

4 0

4 years ago

Read 2 more answers

Sailors once used a unit of length called a fathom to measure the depth of the water. Each fathom is equal to 6 feet. Which equa

ss7ja [257]

Answer:

y = x*(6 feet/1 fathom)

Step-by-step explanation:

We know the relation:

1 fathom = 6 feet.

We can write:

1 = (6 feet/1 fathom)

Now, remember that any number multiplied by 1 does not change.

Then suppose that we have a measure of 3 fathoms, then:

3 fathoms = (3 fathoms)*1

= (3 fathoms)*((6 feet/1 fathom)) = (3 fathoms/1 fathom)*(6feet)

= 3*(6 feet) = 18 feet.

So we changed the units by multiplying the original measure by (6 feet/1 fathom)

Then, if x is the depth of water in fathoms and y is the depth of the water in feet, we can write:

y = x*(6 feet/1 fathom)

3 0

3 years ago

The mass of an electron is approximately 9.11 × 10 -28 grams. Find the mass of 401,000,000 electrons. 3.65311 × 10-19 grams 3.65

NNADVOKAT [17]

Answer:

$Total\ Mass = 3.65311 * 10^{-19}$ grams

Step-by-step explanation:

Given

$Mass = 9.11 * 10^{-28}g$

Required

Determine the mass of 401,000,000 electrons

To do this, we simply multiply the mass of 1 electron by the number of electrons.

This gives:

$Total\ Mass = 401,000,000 * 9.11 * 10^{-28}$

$Total\ Mass = 3653110000 * 10^{-28}$

Express 3653110000 as a standard form

$Total\ Mass = 3.65311 * 10^9 * 10^{-28}$

Apply law of indices:

$Total\ Mass = 3.65311 * 10^{9-28}$

$Total\ Mass = 3.65311 * 10^{-19}$

Hence, the mass of 401000000 electrons is $3.65311 * 10^{-19}\ grams$

4 0

3 years ago

{y=2x+3 {y=-x-9 solve each system of equations by substitution

azamat

Substitute y = 2x + 3 into y = -x - 9

2x + 3 = -x - 9

Solve for x in 2x + 3 = - - 9

x = -4

Substitute x = -4 into y = 2x + 3

y = -5

Therefore,

x = -4

y = -5

3 0

3 years ago

Matt spent 1/5 of his money on a concert ticket. He spent $60 on a new jacket and $2.50 for bus fare. He reached home with $17.5

inn [45]

17.50 + 2.50 + 60 = 80
And if Matt spent 1/5 of his money, the rest of the money is 4/5ths of the total.
4/5 = 80/100 and he has $80 so he had a total of $100.

Hope this helps,
♥A.W.E.S.W.A.N.♥

3 0

3 years ago