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3 years ago

Solve for x when 6x+y=82 3y=18

Mathematics

1 answer:

erik [133]3 years ago

4 0

Answer:

x=12

Step-by-step explanation:

3y=18

simplify this first

3y÷3 = 18÷3

y = 6

6x+y=82

6x+6=82

6x (+6-6)=82-6

6x=72

6x÷6=72÷6

x=12

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P/5 = 10 what is p

Sav [38]

Answer:

Step-by-step explanation:

p/5=10

Your main goal is to isolate p

p/5 = 10, in order to eliminate the 5, multiply 5 on both sides, since it's the inverse of division.

(5)p/5 = 10(5)

p=50

7 0

3 years ago

لیست داده و

choli [55]

Given parameters:

Cost price of the article = Nu.28.30

Selling price of the article = Nu.29.30

Unknown:

Gain percentage = ?

The gain percentage is the same as the percentage profit on a trade.

The formula is given as:

Gain percentage = $\frac{Profit}{Cost price} x 100$

Profit = Selling price - Cost price

= Nu.29.30 - Nu.28.30

= Nu. 1

Now input the parameters and solve;

Gain percentage = $\frac{1}{28.3} x 100$

= 3.5%

The gain percent is 3.5%

3 0

3 years ago

One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. How much of each should be comb

Shalnov [3]

Let x be your first alloy
2/5x+7/10(30-x)=1/2(30)
4x+210-7x=150
3x=60
x=20
So, you need 20 lbs of the first alloy, and 10 parts of the second to make 30 lbs of half iron and half silver alloy!

8 0

3 years ago

Find the distance (-4,5) and (7,18)

seropon [69]

Answer:

$\sqrt{290}\ units$

Step-by-step explanation:

The distance between points $(x_1,y_1)$ and $(x_2,y_2)$ is

$\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$

Hence, the distance between points $(-4,5)$ and $(7,18)$ is

$\sqrt{(-4-7)^2+(5-18)^2}\\ \\=\sqrt{(-11)^2+(-13)^2}\\ \\=\sqrt{121+169}\\ \\=\sqrt{290}\ units$

3 0

3 years ago

Use the graph below to answer the question that follows:

aniked [119]

Answer:

$\boxed{-\frac{6}{\pi}}$

Step-by-step explanation:

The average rate of change over a interval is the slope m of the straight line joining the two points.

$m = \frac{ y_{2} - y_{1} }{ x_{2} - x_{1} }\\\\= \frac{-1 - 5}{ \pi - 0}\\\\= -\frac{ 6}{\pi }$

The average rate of change is $\boxed{-\frac{6}{\pi}}.$

3 0

3 years ago