3 years ago

What is the equivalent expression 9(2a+1)

Mathematics

2 answers:

Nikitich [7]3 years ago

8 0

9( 2a+1 ) =

Distribute parentheses using : a(b+c) = ab+ ac

9 * 2a + 9 * 1 =

18 a + 9

hope this helps!

elena-14-01-66 [18.8K]3 years ago

3 0

18a+9 is equivalent

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The lock on a safe requires a three-digit code to open it. The three digits must each be a number from 0-9 (10 possible numbers)

vovangra [49]

The correct answer is Choice B: 720.

To solve this, you have to use the Fundamental Counting Principal. You find the total number of options for each of the digits, then multiply them together.

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7 0

4 years ago

8 + 4f = 3f solve for f

navik [9.2K]

Answer:

$f=-8$

Step-by-step explanation:

$8+4f=3f$

$8+4f-4f=3f-4f$ (Subtract $4f$ from both sides of the equation to isolate $f$ )

$8=-f$ (Simplify)

$-f=8$ (Symmetric Property of Equality)

$\frac{-f}{-1} =\frac{8}{-1}$ (Divide both sides of the equation by $-1$ to get rid of $f$ 's coefficient; remember that $-f=-1*f$ , so $-f$ has a coefficient of $-1$ )