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Triss [41]
3 years ago
6

Find x if the perimeter of a rectangle is 140. The rectangle has a length of 5x and a width of 4x-2.

Mathematics
1 answer:
RSB [31]3 years ago
4 0

Answer:

x=8

Step-by-step explanation:

p=(l+b)

140=2(x+4x-2)

140=2(9x-2)

140=18x-4

140+4=18x

144=18x

144/18=x

8=x

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A 64-inch board is cut into three pieces so that the second piece is twice as long as the first piece, and the third
Dafna1 [17]
<h3>Answer:  40 inches</h3>

==========================================================

Explanation:

  • x = first piece
  • 2x = second piece, since its twice as long as the first
  • 5x = third piece, since its five time as long as the first

x is some positive real number, and the units of each are in inches.

Add up the smaller pieces and we should get 64 inches back again

x+2x+5x = 64

8x = 64

x = 64/8

x = 8

The first piece is 8 inches long.

2x = 2*8 = 16 is the length of the second piece (in inches)

The third piece is 40 inches because 5x = 5*8 = 40

--------

Summary:

first = 8 inches

second = 16 inches

third = 40 inches

Check: 8+16+40 = 64, which confirms the answer

8 0
3 years ago
Sharon wants to make a graph to show the relationship between the number of tickets sold and the price of tickets sold. She plot
Masteriza [31]

The statement that best describes the graph is “It will not be spread out across the entire coordinate plane because in Step 3 Sharon plotted the independent variable on the y-axis.”

 

To add, graphing is a powerful tool for representing and interpreting numerical data. In addition, graphs and knowledge of algebra can be used to find the relationship between variables plotted on a scatter chart.

4 0
3 years ago
Need help with b, picture attached.
Vikki [24]
7500/75=100
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1.34 x 1024<br> molecules of<br> CH, is how<br> many moles?
icang [17]

Answer:

1372.16

Step-by-step explanation:

If I am not mistaken, the answer is just 1.34*1024, which is 1372.16. Also, I assume that "moles" mean molecules.

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3 years ago
I really need help on this question!!!
Effectus [21]

A combination in this question, is combining 2 activities out of the 3.

The possible combinations are:

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If you need the opposite order:

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Hope This Helped! Good Luck!

6 0
3 years ago
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