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3 years ago

What is the sum of 13 5/7 + 13/28 ?

Mathematics

1 answer:

nydimaria [60]3 years ago

4 0

Look at the attached picture⤴

Hope it will help u....:)

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When 40% of a number is added to the number the result is 210 what is the number

Nostrana [21]

Let the number be x
$x + (x \times 40\% )= 210$

4 0

3 years ago

PLS HELP

kogti [31]

Answer:

C = -5

Step-by-step explanation:

Functions

F(x) is defined as:

$\displaystyleF(x)=\frac{C-x}{D-x}$

We know F(-2) is undefined. It comes from the fact that the denominator is 0 for this value of x, thus:

D - (-2) = 0

Solving:

D = -2

Substituting:

$\displaystyleF(x)=\frac{C-x}{-2-x}$

We also know F(-1) = 4:

$\displaystyle \frac{C-(-1)}{-2-(-1)}=4$

$\displaystyle \frac{C+1}{-2+1}=4$

$\displaystyle \frac{C+1}{-1}=4$

Multiplying by -1

C + 1 = -4

Solving for C:

C = -5

5 0

3 years ago

Why is it that -log(x+8)=4-log(x-7) has no solution? (they are log base 2)

Lerok [7]

$-log(x+8)=4-log(x-7)$

$-\log _{10}\left(x+8\right)+\log _{10}\left(x+8\right)=4-\log _{10}\left(x-7\right)+\log _{10}\left(x+8\right)$

$0=4-\log _{10}\left(x-7\right)+\log _{10}\left(x+8\right)$

$0+\log _{10}\left(x-7\right)=4-\log _{10}\left(x-7\right)+\log _{10}\left(x+8\right)+\log _{10}\left(x-7\right)$

$\log _{10}\left(x-7\right)=\log _{10}\left(x+8\right)+4$

$\log _{10}\left(x-7\right)=\log _{10}\left(x+8\right)+\log _{10}\left(10000\right)$

$x-7=\left(x+8\right)\cdot \:10000$

$\mathrm{Solve\:}\:x-7=\left(x+8\right)10000:\quad x=-\dfrac{26669}{3333}$

$\mathrm{Verifying\:Solutions}:\quad x=-\dfrac{26669}{3333}\space\mathrm{False}$

$\mathrm{No\:Solution\:for\:x\in \mathbb{R}}$

3 0

3 years ago

Read 2 more answers

Which exponential function is represented by the values in the table?

Goryan [66]

Answer:

$\displaystyle f(x)=4\cdot\left(\frac{1}{2}\right)^x$

Step-by-step explanation:

Exponential Function

The exponential function can be written with the general equation:

$f(x)=A\cdot r^x$

Where A is the value when x=0 and r>0 is the ratio. If r is greater than 1, the function is increasing, if r is less than 1, the function is decreasing.

The table shows the relation between values of x and values of the function y. Note that as x increases (one by one), y decreases with a ratio of 1/2. Only the last two choices have ratios of r=1/2. We only have to test which one of them has the correct value of y=4 when x=0.

Substituting in the third function:

$\displaystyle f(x)=4\cdot\left(\frac{1}{2}\right)^x$

$\displaystyle f(0)=4\cdot\left(\frac{1}{2}\right)^0$