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3 years ago

6

Find two numbers, if Their sum is 3/5 and their difference is 7 1/5

2 answers:

atroni [7]3 years ago

7 0

Set up a system of equations:

x + y = 0.6
x - y = 7.2

You can solve using elimination. Add the two equations together:

2x + 0y = 7.8
2x = 7.8
x = 3.9

Then plug the number back into either of the two original equations to solve for y:

3.9 + y = 0.6
y = -3.3

The two numbers are 3.9 and -3.3

Dmitry_Shevchenko [17]3 years ago

3 0

Answer:

3.9 and -3.3

Step-by-step explanation:

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1 year ago

A stock was priced at $12 3/8 per share. It rose in price by $3 1/4 per share. What was its new price?

lubasha [3.4K]

Option A

The new price is $ $15 \frac{5}{8}$

<h3><u>Solution:</u></h3>

Given that, a stock was priced at $ $12 \frac{3}{8}$ per share.

It rose in price by $ $3 \frac{1}{4}$ per share.

New price = old price + rise in price

Thus to find out the new price, we have to add old price and rise in price

$\text { So, new price }=\$ 12 \frac{3}{8}+\$ 3 \frac{1}{4}$

$\text { New price }=\frac{12 \times 8+3}{8}+\frac{3 \times 4+1}{4}$

On solving we get,

$\text { New price }=\frac{96+3}{8}+\frac{12+1}{4}$

$\begin{array}{l}{\text { New price }=\frac{99}{8}+\frac{13}{4}=\frac{99+26}{8}} \\\\ {\text { New price }=\frac{125}{8}}\end{array}$

On converting to mixed fraction,

$\begin{array}{l}{\text { New price }=\frac{120+5}{8}} \\\\ {\text { New price }=15 \frac{5}{8}}\end{array}$

Hence, the new price is $15 \frac{5}{8}$ , so option A is correct.

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4 years ago

What is the simplified form of the equation fraction 4 over 5 n minus fraction 3 over 5 equals fraction 1 over 5 n?

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I believe the answer is A) N=1

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4 years ago

On a map, the length of a nature trail is 7.2 centimeters. If the scale is 1 centimeter to 25 kilometers, what is the actual len

levacccp [35]

Given the scale is 1 cm to 25 km.

We have to find the length of the trail from centimeter to the nearest tenth of kilometer.

Let's take the length of the trail be x km.

The length of the trail given 7.2 cm. We will have to find the length in km.

We have to set it up as a proportion. So we can write the proportion as,

$\frac{1}{25} = \frac{7.2}{x}$

We have to cross multiply first. We will get,

$(1)(x) = (7.2)(25)$

$x= (7.2)(25)$

$x = 180$

So we have got the required length of the train in kilometer.

The actual length of the trail = 180km.

6 0

4 years ago

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