3 years ago

A mathematical hypothesis could be a guess at a _____ rule. variable function input

Mathematics

1 answer:

jeka57 [31]3 years ago

7 0

I want to say function rule

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Two-thirds a number plus 4 is 7

ICE Princess25 [194]

The equation (form) is: $\frac{2}{3}x + 4 = 7$

The solution of the equation is: $x = \frac{9}{2}$

Explanation:

First, let's call the number we are going to solve for "x".

Then two thirds of this number can be written as:

$\frac{2}{3}x$

Then "plus 4" means add 4 we get:

$\frac{2}{3}x + 4$

"is 7" means that the above expression is equal to 7 (as follows):

$\frac{2}{3}x + 4 = 7$

The solution of the above equation is:

$\frac{2}{3}x + 4 = 7 \\ \frac{2}{3}x = 3 \\ x = \frac{9}{2}$

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Answer:

The value of 2n - 2 is 4.

Step-by-step explanation:

Given the equation

$n + 7 = 10$

Subtract 7 from both sides of the equation

$n+7-7=10-7$

Simplify

$n=3$

Now substituting n = 3 in the equation

2n - 2 = 2(3) - 2

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Therefore, the value of 2n - 2 is 4.

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