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shutvik [7]
3 years ago
9

Algebra question please help me

Mathematics
2 answers:
Mila [183]3 years ago
7 0
What’s your question?
aliya0001 [1]3 years ago
4 0

Absolute value is defined as follows:

|x| = x if x ≥ 0 and -x if x < 0.

To make an equation using absolute value, you need to look for the following:

1) something where you use positive and negative numbers

2) something where changing the sign between positive and negative, or vice versa, doesn't affect the problem.

Choice A talks about price per gallons. You can't have negative money amounts so this one won't work.

Choice B talks about distances of walking. In math classes you can have negative distance, but not in reality. Nope.

Choice D talks about books. But books sold as a negative number means you bought them, and the meaning changes. Nope.

Choice C uses "plus or minus". It also talks about something that's approximate, and it's also a case where the signs won't matter. Bingo.


Thus choice C is best.

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Kevin and Randy Muise have a jar containing 32 ​coins, all of which are either quarters or nickels. The total value of the coins
givi [52]

Answer:

19 quarters and 13 nickles

Step-by-step explanation:

You have 32 coins in your pocket consisting of nickels and quarters with a total value of $5.40

How many nickels and quarters do you have?

Step 1: Setup Coin Value and Coin Total Equation:

Coin Value Equation → 0.05n + 0.25q = $5.40 where n = nickels and q = quarters

Coin Total Equation → n + q = 32

Step 2: Rearrange Coin Total Equation in terms of nickels (n)

n = 32 - q ← Revised Coin Total Equation

Step 3: Plug in our Revised Coin Total Equation for n into our Coin Value Equation:

0.05(32 - q) + 0.25q = $5.40

0.05(32) - 0.05(q) + 0.25q = $5.40

1.6 - 0.05q + 0.25q = $5.40

1.6 + (0.25 - 0.05)q = $5.40

1.6 + 0.2q = $5.40

Step 4: Subtract 1.6 from each side of the equation to isolate q

1.6 - 1.6 + 0.2q = $5.40 - 1.6

0.2q = 3.8

Step 5: Divide each side of the equation by 0.2 to isolate q

0.2q

0.2

=

3.8

0.2

q = 19

Step 6: Using our value for q, Solve for n using our Coin Total Equation:

n + 19 = 32

Subtracting 19 from both sides, we get n + 19 - 19 = 32 - 19

n = 13

Summarizing our word problem, we see that 19 quarters and 13 nickels adds up to $5.40

8 0
2 years ago
Need help! 15 points :&gt;
VikaD [51]

Answer:

D

Step-by-step explanation:

The volume of Model A is 48 cm³. The volume of Model B is 40 cm³. 48+40=88.

7 0
3 years ago
Read 2 more answers
What is 2/3rd a decimal rounded to the third decimal​
dimulka [17.4K]

Answer:

0.667 or 0.666 (with the line over the last sixth)

Step-by-step explanation:

The original answer is 0.666666666666666 (continued on forever). Find the third decimal place and determine whether the next number follows the "5 or greater" rounding rule and round from there. The answer depends on the type of teacher.

5 0
3 years ago
Jill makes $450 per week working in the human resources department. What is her annual salary?
mixer [17]

you didnt give much context but excluding breaks she might get it should be 24,400

450(x). x being weeks in a year (52)

5 0
3 years ago
Please help, I have been struggling w this one for a while:( ​
viva [34]

Answer:

option 2

Step-by-step explanation:

I hope that's the answer cause I'm pretty sure it is

3 0
3 years ago
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