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3 years ago

2^7-3x=1/4 solve equation

Mathematics

2 answers:

Fofino [41]3 years ago

6 0

Answer:x=

511

Step-by-step explanation:

Let's solve your equation step-by-step.

27−3x=

Step 1: Simplify both sides of the equation.

27−3x=

128+−3x=

−3x+128=

Step 2: Subtract 128 from both sides.

−3x+128−128=

−128

−3x=

−511

Step 3: Divide both sides by -3.

−3x

−3

−511

−3

511

Answer:

511

xenn [34]3 years ago

4 0

Answer:

42.583 (3 is repeated)

Step-by-step explanation:

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A 1,000 mL solution of acetic acid contains 26 mL of pure acetic acid. Find the percent concentration of this solution.

Mrac [35]

Given:

Total solution : 1000mL

Pure acetic acid = 26mL

To find:

The percent concentration of given solution.

Solution:

We know that,

$\text{Percent concentration}=\dfrac{\text{Pure acetic acid}}{\text{Total solution}}\times 100$

Putting the given values, we get

$\text{Percent concentration}=\dfrac{26}{1000}\times 100$

$\text{Percent concentration}=\dfrac{26}{10}$

$\text{Percent concentration}=2.6$

Therefore, the percent concentration of this solution is 2.6%.

6 0

3 years ago

Which of the following matrices is the solution matrix for the given system of equations? x + 5y = 11 x - y = 5

givi [52]

<h2>The required solution is x = 6 and y = 11 </h2>

Step-by-step explanation:

Given system of equations are

x+5y = 11 and x-y =5

$A= \left[\begin{array}{cc}1&5\\1&-1\end{array}\right]$ $X=\left[\begin{array}{c}x\\y\end{array}\right]$

and $B= \left[\begin{array}{c}11\\5\end{array}\right]$

∴AX=B

$adj A = \left[\begin{array}{cc}{-1}&{-5}\\{-1}&1\end{array}\right]$

$A= \left|\begin{array}{cc}1&5\\1&-1\end{array}\right|=-6$

∴ $A^{-1} =\frac{adj A}{|A|}$

So, $A^{-1} =\frac{ \left[\begin{array}{cc}{-1}&{-5}\\{-1}&1\end{array}\right]}{-6}$

$A^{-1} ={ \left[\begin{array}{c \c} {{\frac{1}{6} }}&{\frac{5}{6}}\ \\ {{\frac{1}{6} }}&{\frac{-1}{6}} \end{array}\right]}$

$X =A^{-1}\times B$

⇒ $\left[\begin{array}{c}x\\y\end{array}\right] ={ \left[\begin{array}{c \c} {{\frac{1}{6} }}&{\frac{5}{6}}\ \\ {{\frac{1}{6} }}&{\frac{-1}{6}} \end{array}\right]} \times \left[\begin{array}{c}11\\5\end{array}\right]$

⇒ $\left[\begin{array}{c}x\\y\end{array}\right] ={ \left[\begin{array}{c} {6}\\ {11} \end{array}\right]}$

∴ x= 6 and y = 11

The required solution is x = 6 and y = 11

7 0

2 years ago

(1over5^2(3+2+5)^2=<br>i need helllllllllllllllllp pleaaaaaaassssseee

Nikitich [7]

Answer:

2500

Step-by-step explanation:

5^2(3+2+5)^2

5^2(10)^2

25(100)

=2500

8 0

3 years ago

Read 2 more answers

How did your position affect the vital capacity of your lungs? Suggest an explanation for any difference you found .

finlep [7]

Answer:

sdf

Step-by-step explanation:

dsf

4 0

2 years ago

The diameter of a circle that has an area of 452.16 mm

irinina [24]

The diameter is 24 since if you ÷ it by 2 you get 12 to get area it is radius squared so 12 × 12= 144×pi which is 3.14= 452.16 mm you can even check in a calculator

3 0

3 years ago