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Solve for $j$ . $\newline$ $3 = |3j|$ $\newline$ Write your answers as integers or as proper or improper fractions in simplest form. $\newline$ $j =$ _ or $j =$ _

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Solve absolute value equations

Full solution

Q. Solve for

j

.

\newline

3 = |3j|

\newline

Write your answers as integers or as proper or improper fractions in simplest form.

\newline

j =

_____ or

j =

_____

Absolute Value of $3j$ : $3 = |3j|$ $\newline$ Find the value of $|3j|$ . $\newline$ Since the absolute value of a number is always non-negative, and $3$ is positive, $|3j|$ can be equal to $3$ or $-3$ . $\newline$ However, the absolute value output cannot be negative, so $|3j|$ must equal $3$ .
Find $j$ : $|3j| = 3$ $\newline$ Find the values of $j$ . $\newline$ If $|x| = a$ , then $x = a$ or $x = -a$ . $\newline$ So, $3j = 3$ or $3j = -3$ .
Solve for $j$ ( $3j = 3$ ): Solve for $j$ when $3j = 3$ . $\newline$ Divide both sides by $3$ to isolate $j$ . $\newline$ $\frac{3j}{3} = \frac{3}{3}$ $\newline$ $j = 1$
Solve for $j$ ( $3j = -3$ ): Solve for $j$ when $3j = -3$ . $\newline$ Divide both sides by $3$ to isolate $j$ . $\newline$ $\frac{3j}{3} = \frac{-3}{3}$ $\newline$ $j = -1$

More problems from Solve absolute value equations

Question

3 n^{2}=27

\newline

What are the solutions to the given equation?

\newline

1

\newline

n=\sqrt{3}

\newline

n=3

\newline

n=-\sqrt{3}

n=\sqrt{3}

\newline

n=-3

n=3

Posted 10 months ago

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6=3 x

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Question

\frac{1}{2} c^{2}+3 c=1

\newline

c=f

c=g

be the solutions to the given equation. If

f>g

, which of the following is the value of

f

\newline

1

\newline

-3+\sqrt{2}

\newline

-3+\sqrt{11}

\newline

3+\sqrt{2}

\newline

3+\sqrt{11}

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x

that solves the equation

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\newline

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\newline

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\newline

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that solves the equation

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\newline

x=

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Find the value of `x`

\newline

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Posted 8 months ago

Question

\$200

with which to purchase hats and t-shirts that are to be sold at his class' next fundraiser. Each hat costs the same amount of money, and each t-shirt costs the same amount of money. If Aiden spends all his money entirely on hats, he will get

40

hats. If Aiden purchases only t-shirts, he will get

80

t-shirts. Which of the following best models the relationship between the number of hats,

h

, and the number of t-shirts,

t

, that Aiden could purchase with this money?

\newline

1

\newline

40h+80t=400

\newline

80h+40t=200

\newline

5h+2.5t=200

\newline

2.5h+5t=200

Posted 8 months ago

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