$79.95 rounded to the nearest cent

Mathematics

1 answer:

Nataly [62]4 years ago

3 0

$80.00 because in the ones place, 1-4 goes down and 5-9 goes up.

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Write 0.000000123 as a power of 10.

Mumz [18]

Answer:

1.23 x 10^-7

Step-by-step explanation:

you went back 7 so its negative

8 0

4 years ago

Please show steps to solve y=3\2x-2 y=x+2

castortr0y [4]

Substitute what you know y is equal to into the equation:
y = x + 2
3/2x - 2 = x + 2

Then you can simplify your equation by multiplying both sides by 2 to eliminate the fraction which will give you:

3x - 4 = 2x + 4

Add the -4 to the other side to get 8 and subtract the 2x from the 3x so you have:

x = 8 Now solve for y by substituting your value for x into the other equation:
y = 3/2(8) - 2 Simplify by combining your numbers and you get:
y = 10 Check your answer by substituting y and x into the original equation:
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Correctly done! So your answers are x = 8 and y = 10

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4 years ago

The set notation of [-5,16) is?

valentina_108 [34]

Answer: $\left\{x | x \in \mathbb{R}, \ -5 \le x < 16\right\}$

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Explanation:

We have some number x such that x is a real number, so we write that as $x \in \mathbb{R}$ which is saying "x is in the real number set".

The portion $-5 \le x < 16$ is how x is restricted. This means x can be -5 or larger, but also must be smaller than 16.

This is from the interval notation [-5, 16). The square bracket means we include -5 as part of the interval, but we exclude 16 because of the curved parenthesis.

The curly braces surrounding everything indicates that we have a set of values.

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Side note:

If x is an integer, then we can get this roster set {-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} showing all of the integers between -5 and 16, including -5 but excluding 16.

Though chances are your teacher will want you to stick to real numbers rather than just integers.

4 0

4 years ago

20-x=6. Explain how you would solve the equation

MaRussiya [10]

Answer:

Step-by-step explanation: