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pantera1 [17]
3 years ago
6

Solve xy - 3 = k solve for x

Mathematics
2 answers:
Sergeu [11.5K]3 years ago
7 0

Answer:

x =  \frac{k + 3}{y}

Step-by-step explanation:

Do all u can to make x stand alone.

Just obey the rules of fhe operations when they cross the equal sign.

ladessa [460]3 years ago
3 0

Answer:

x=(k+3)/y

Step-by-step explanation

First, we simplify by adding 3 to both sides of the equation

xy-3+3=k+3

Now it's xy=k+3

To get x we divide both sides by y

So x=(k+3)/y

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John took all his money from his savings account. He spent ​$110 on a radio and 4/11 of what was left on presents for his friend
svp [43]

Answer:

$1210

Step-by-step explanation:

Let x be total amount

First John spent $110 on a radio and 4/11 of what was left on presents for his friends so he was left with

\frac{7}{11}(x-110)=\frac{7}{11}x-70

Then he put 2/5 of his remaining money into a checking account

\frac{3}{5}\left(\frac{7}{11}x-70\right)

Rest he donated to charity

420=\frac{3}{5}\left(\frac{7}{11}x-70\right)\\\Rightarrow \left(\frac{7}{11}x-70\right)=\frac{2100}{3}\\\Rightarrow \frac{7}{11}x-70=700\\\Rightarrow \frac{7}{11}x=770\\\Rightarrow x=1210

Hence total amount of money John originally had was $1210

8 0
3 years ago
A rectangular prism has a length of 12 centimeters, a width of 6 centimeters, and a height of 9 centimeters. A cross section is
Klio2033 [76]

Answer:

<h2>The perimeter of the cross section is 30 centimeters.</h2>

Step-by-step explanation:

In this problem we have the intersection of a rectangular prism an a plane.

The dimensions of the rectangular plane are

l=12cm\\w=6cm\\h=9cm

Assuming the plane is cutting the prism horizontally, the cross section would have dimensions

w=6cm\\l=9cm

Because only the height would be cut.

So, the perimeter of the rectangle cross-section is

P_{cross}=2(l+w)=2(6+9)=2(15)=30cm

Therefore, the perimeter of the cross section is 30 centimeters.

3 0
3 years ago
HALP PLS NO LINKS OR FILES PLS<br> SCREENSHOT BELOW!!!
Sidana [21]

Answer:

12 and 13

Step-by-step explanation:

7 0
3 years ago
5/8 -0.5 evaluate each expression. Write answer as a decimal
gregori [183]

Answer:

0.125

Step-by-step explanation:

0.5 =1/2

Now

5/8 - 1/2

5/8 - 1*4/2*4

5/8-4/8

(5-4)/8

1/8

0.125

6 0
3 years ago
In a 10 x 10 grid that represents 800, one square represents
ludmilkaskok [199]
Each square represents 8

If it is 10×10 then there is 100 squares

800÷100=8
3 0
3 years ago
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