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2 years ago

Need help with number 20

Mathematics

1 answer:

olga2289 [7]2 years ago

5 0

4^4x = 8
since 4 = 2^2 & 8= 2^3
so we can write the equation as
(2^2)^4x = 2^3
2^8x =2^3
sp ,, 8x = 3
then x = 3/8

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Solve the equation for x.<br> -=7<br> Answer here

Leviafan [203]

Complete Question:

Solve the equation for x

$x-7=7$

Answer:

$x = 14$

Step-by-step explanation:

Given

$x-7=7$

Required

Solve for x

$x-7=7$

Add 7 to both sides

$x-7+7=7+7$

$x=7+7$

$x = 14$

Hence:

For $x-7=7$ , $x = 14$

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2 years ago

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Blizzard [7]

<h3>Solution</h3>

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1 year ago

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Amanda [17]

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4 0

2 years ago

Let p=3x+4. Which equation is equivalent to (3x+4)^2-36=15x+20 in terms of p

mixer [17]

Answer:

The equation is " $\bold{p^2-5p-36=0}$ "

Step-by-step explanation:

Given:

$\to p=3x+4$

evaluate $(3x+4)^2-36=15x+20$ in terms of p=?

$\to (3x+4)^2-36=15x+20\\\\\to (3x+4)^2-36=5(3x+4)\\\\\to p^2-36=5p\\\\$

Expression in terms of p:

$\to \bold{p^2-5p-36=0}\\\\$

$\to p^2-(9-4)p-36=0\\\\\to p^2-9p+4p-36=0\\\\\to p(p-9)+4(p-9)=0\\\\\to (p-9)(p+4)=0\\\\\to p-9=0 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \to p+4=0\\\\\to \bold{p=9 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \to p=-4}\\\\\to 3x+4=9 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \to 3x+4=-4\\\\\to 3x=5 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \to 3x=-8\\\\\to x=\frac{5}{3} \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \to x=- \frac{8}{3}\\\\$

The value of p: 9 and -4

Equation is: $\bold{p^2-5p-36=0}$

6 0

2 years ago

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kiruha [24]

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2 years ago