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Serhud [2]
3 years ago
15

Solve 13^x+2=5 having a bit of trouble

Mathematics
1 answer:
-Dominant- [34]3 years ago
3 0
<em>Solve: </em>13^{x} + 2 = 5

Start by isolating the x-variable as much as you can:
13^{x} = 5 - 2 = 3
13^{x} = 3

Now, if we take the log with base 13 of both sides, then the left hand side will cancel out really easily. This is based on the concept of inverse operations. For example, when we take the square of a square root, we get our initial value. This is because the two operations are inverses of each other, and basically undoes each other.

Logarithms and exponentials are the inverse operations of each other. If we want to extrapolate the power of an exponential, we take the logarithmic function of it, and vice versa.

In this case, we are saying what power of '13' will produce us with 13ˣ, and the only answer will be x itself.

log_{13}(13^{x}) = log_{13}(3)
x = log_{13}(3)
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I need help on this one ?
soldier1979 [14.2K]

Answer:

1.5^2 = 2.25

(it looks like 1.5 but if it's 15 then it would be 225)

Step-by-step explanation:

1.5^2 means (1.5*1.5) you multiply the number by itself by how many it says to do. So if it were 1.5^52 you would multiply 1.5 by 1.5, 52 times.

7 0
3 years ago
27 solid iron spheres,each of radius x cm are melted to form a sphere with radius y cm ,find the ratio of x:y
madam [21]

Radius of 1 solid iron sphere =r

→ Volume =34πr3

→ Volume of 27 solid iron

spheres =27x34πr3

→ 34πr'3=27x34πr3

r'3=2πr3

→r'=3r

(ii) Surface area =4+πr2

SA r'=4πr'2

=4π(3r)2=36πr2

S'S=36πr24πr2=91=1:9

7 0
1 year ago
Which function is graphed below?<br> d(x)= √-2-x<br> f(x)=√2+x<br> g(x)= √2+x<br> h(x) = √2-xX
aksik [14]

Answer:

g(x) = \sqrt{2+x}

Step-by-step explanation:

We can see that the graph is beginning at (-2; 0), then the domain of defintion needs to be [-2; +inf], the only function that satisfies this is that function!

3 0
1 year ago
Thinking about the areas of a Standard Normal Distribution, as z values decrease, do the areas to the left of z increase, or dec
bazaltina [42]
The Standard Normal Distribution is a "Bell-shaped" curve as shown in the figure below.
The distribution ha these properties:
(i) The normalized random variable, z, is the horizontal coordinate for the curve.
(ii) The total area under the curve is 1.
(ii) The curve is symmetric about z = 0.

Answer:
As z values decrease, areas to the left of z decrease.


6 0
3 years ago
Solve 28m+21=413 thanks!
mash [69]

Answer:

14

Step-by-step explanation:

28m + 21 = 413

28m = 413 - 21

        = 392

m = 392/28

   = 14

Therefore m is 14 :)

4 0
2 years ago
Read 2 more answers
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