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horrorfan [7]
3 years ago
9

What is the variable in the expression: 25 + 5z - 3?

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
8 0

Answer:

The variable is z

Step-by-step explanation:

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What’s the inverse of <br> f(x) = -2 + 2/3x
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So the steps to find the inverse are:

  1. Change f(x) to y
  2. Switch the positions of x and y
  3. Solve for y
  4. Change y to f^-1(x)

f(x)=-2+ \frac{2}{3}x\\\\y=-2+ \frac{2}{3}x\\\\x=-2+ \frac{2}{3}y

Now let's solve for y as such:

x=-2+ \frac{2}{3}y \\\\x+2=\frac{2}{3}y\\\\\frac{3}{2} (x+2)=y\\\\\frac{3}{2}x+3=y\\\\\frac{3}{2}x+3=f^{-1}(x)

<u>Your inverse is f^-1(x) = 3/2x + 3</u>

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Is there a pattern behind prime numbers?
Trava [24]

Answer:

A clear rule determines exactly what makes a prime: it's a whole number that can't be exactly divided by anything except 1 and itself. But there's no discernible pattern in the occurrence of the primes. ... That's because after the number 5, there are only four possibilities — 1, 3, 7 and 9 — for prime last digits

Step-by-step explanation:

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What is 3/4 improper or proper or mixed
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alexira [117]

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