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2 years ago

12

Is -(-0.5x + 10) equivalent to 1/2x + 10?

2 answers:

dolphi86 [110]2 years ago

8 0

Answer: idk

Step-by-step explanation: i

d

k

exis [7]2 years ago

8 0

Answer:

no

Step-by-step explanation:

if you have a subtraction sign outside parenthesis, such as -(-0.5x + 10), then the - goes to all numbers inside it:

-(-0.5x + 10) <em>would be</em>

0.5x - 10 <em>after distributing the negative sign</em>

<em>so that is incorrect because </em>0.5x - 10 is not equivalent to 1/2x + 10

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Answer:

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Step-by-step explanation:

Carolyn's work is incorrect. Below is the correct solution:

Given:

$3x - 2y = 7$ ----› Equation 1

$y = x + 2$ -----› Equation 2

Substitute y = (x + 2) in equation 1

$3x - 2y = 7$ ----› Equation 1

$3x - 2(x + 2) = 7$ (substitution)

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[Note: this is where Carolyn made a mistake]

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Collect like terms

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3 years ago

Last year, Mark was 46 inches tall. This year, Mark’s height is 3 inches less than Peter’s height. Peter is 51 inches tall. How

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2 years ago

10| x – 4| - 3 > 47

Andrew [12]

Answer:

x < -1 or x > 9

Step-by-step explanation:

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Simplify.

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Divide both sides by 10.

$\frac{10|x-4|}{10} >\frac{50}{10}$

Simplify.

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Apply absolute value rule: If $|u|>a,a>0$ then $u < -a$ or $u>a$

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Simplify.

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$x-4+4>5+4$

Simplify.

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Combine the intervals.

$x$ or $x>9$

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