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ratelena [41]
3 years ago
10

the sales tax for an item was $30.10 and it cost $430 before tax. find the sale tax rate. write your answer as a percentage.

Mathematics
1 answer:
timurjin [86]3 years ago
4 0
To find a percentage of a number, multiply by the decimal form of that percentage(20%=0.20). So, take the cost, $430, and multiply by common state sales tax (7% for me)---430 x 0.07 = 30.10  The sale tax rate is 7%.
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Which expression is equivalent to -1/2 (1/4 x - 3/8). SHOW WORK
Thepotemich [5.8K]

Answer:

A. -1/8 x + 3/16

Step-by-step explanation:

Distribute -1/2 over the parentheses

-1/2 ( 1/4 x - 3/8 )

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multiply fractions to simplify

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A is correct

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2 years ago
Please help, thank you
grandymaker [24]

Answer:

x = 20

Step-by-step explanation:

The angles that are marked are called "vertical angles" (I think of a pair of scissors) The two angles are equal to each other. (They get bigger or smaller together, like a pair of scissors)

So, set them equal to each other and solve.

3x + 50 = 6x - 10

SUBTRACT 3x from both sides.

50 = 3x - 10

ADD 10 to both sides.

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DIVIDE both sides by 3.

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3 years ago
Which point on the y-axis lies on the line that passes through
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Solve for x:<br> 4(x + 4) = 6(x - 2)<br> O A. x = 9<br> B. x = 14<br> O C. x = 8<br> D. x = 1
BigorU [14]

Answer:

x = 14

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS

<u>Algebra I</u>

  • Equality Properties

Step-by-step explanation:

<u>Step 1: Define equation</u>

4(x + 4) = 6(x - 2)

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute:                                   4x + 16 = 6x - 12
  2. Subtract 4x on both sides:         16 = 2x - 12
  3. Add 12 on both sides:                28 = 2x
  4. Divide 2 on both sides:              14 = x
  5. Rewrite:                                       x = 14

<u>Step 3: Check</u>

<em>Plug in x to verify it's a solution.</em>

  1. Substitute:                    4(14 + 4) = 6(14 - 2)
  2. Add/Subtract:               4(18) = 6(12)
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And we have our final answer!

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