All categories

2 years ago

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

2 answers:

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]2 years ago

3 0

Answer:

3.9 and -3.3

Step-by-step explanation:

You might be interested in

Order from least to greatest, please.

Rus_ich [418]

<h2><u><em>1/3 < 5/6 < 3/2</em></u></h2><h2><u><em></em></u></h2><h2>This Would Be The Order From Least To Greatest</h2>

<h2 />

4 0

3 years ago

NEED THIS QUICK, WILL GIVE BRAINLIEST

grin007 [14]

Answer:

The slope is 10.

Step-by-step explanation:

30/3 = 10

50/5 = 10

70/7 = 10

90/9 = 10

The common factor is 10 which is the slope.

4 0

2 years ago

Write the set builder notation {8}

timofeeve [1]

Step-by-step explanation:

$\{8 \} = \{x : x = n, \: n \in \:N, \: \: 7 < n > 9 \: \}$

5 0

3 years ago

The coffee Lily likes is composed of 97.3% water and 2.7% cocoa. The coffee John likes is composed of 96% water and 4% cocoa. Ho

mestny [16]

30 ounces of the coffee John likes consists of

$0.96\cdot30=28.8$ ounces of water
$0.04\cdot30=1.2$ ounces of cocoa

To this mixture we're adding $x$ ounces of water, so that the new mix has a total volume of $30+x$ ounces and matches the composition of the coffee Lily likes. This means it would consist of

$0.973\cdot(30+x)=28.8+x$ ounces of water
$0.027\cdot(30+x)=1.2$ ounces of cocoa (same amount of cocoa as before because pure water is being added)

Solve for $x$ :

$0.973(30+x)=28.8+x\implies29.12+0.973x=28.8+x$

$\implies0.39=0.027x$

$\implies x\approx14.4$

###

Just to confirm: the new mixture consists of

$28.8+14.4=43.2$ ounces of water
$1.2+0=1.2$ ounces of cocoa

giving a total volume of $43.2+1.2=44.4$ ounces of coffee, and $\dfrac{43.2}{44.4}\approx0.973$ , as required.

4 0

3 years ago

Equations

sergij07 [2.7K]

Answer:

2x+12=24

first you subtract 12 from both sides

2x+12=24

-12. -12

The 12-12 should cancel itself, the rest of the equation you bring down to get

2x=12 (because 24-12=12)

Now you have 2x=12.
you then divide 2x by both sides.

2x=12

/2x=/2x

The 2x/2x cancels itself out so you then solve for 12/2x.

For this you just divide 12/2 which is 6!

x= 6 is your final answer.
to check this equation you can plug your number back into x to see if it is true! 2(6)+12=24.
6 times 2 is 12 and 12+12 is 24 so your answer (6) is true!

hope this helps! :D

4 0

2 years ago

Read 2 more answers