Ron bought 8 pencils and 2 erasers for $1.66. Sarah bought 12 pencils and 5 erasers for $3.19. What is the cost for 1 pencil and 1 eraser?

Answers

Answer 1

Answer: p=price of 1 pencil
e=price of 1 eraser

1.66=8p+2e
divide by 2 for simplification
0.83=4p+e

3.19=12p+5e

0.83=4p+e
multiply by -5 and add to obht eration

-4.15=-20p-5e
3.19=12p+5e +
-0.96=-8p

divide by -8
0.12=p
sub back

0.83=4p+e
0.83=4(0.12)+e
0.83=0.48+e
minus 0.48 both sides
0.35=e

1e+1p=0.12+0.35=0.47

cosst is $0.47

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Anthony found a number that is 20% of 30% of 400 what percent of 45 is the number that Anthony found

Answers

For this case we have:

1st step:

We look for 30% of 400 by a rule of three of the form:

400 -------> 100%

x -----------> 30%

Where x is given by the number that represents 30% of 400.

We have:

$x =((30 * 400))/(100)\nx = 120$

2nd step:

We search for 20% of the number found, that is, $x = 120$ , using a rule of three:

120 -------> 100%

y -----------> 20%

Where y is given by the number that represents 20% of 120.

We have:

$y =((20 * 120))/(100)\ny = 24$

So, the number that Anthony found is 24.

3rd step:

According to the statement, we must find the% that represents the number of Anthony, based on the number 45. Through a rule of three we have:

45 -------> 100%

24 -----------> z%

Where z is given by the% that represents Anthony's number, knowing that 45 represents 100%.

We have:

$z =((24 * 100))/(45)\nz = 53.33$ %

Answer:

The number of Anthony represents 53.33% of 45.

Please answer the question and shhow how you got your answer please

Answers

Answer: 0

Step-by-step explanation: Two of the numbers are both negative you’re going to want to add those together first. -17 + (-3) = -20. What’s left is -20 + 20 when you add a positive (20) with a negative (-20) you’re going to need to ‘subtract’ so sort of like this : 20 - 20 and that equals 0

The answer is 7272837327373736379229838

List 3 values that would make this inequality true.

Answers

10, 20, and 30. Hope this helped :0

I think 5, 10, and 15 might work, but 10, 20, and 30 do for sure.

Taylor says that 40 percent of 50 is the same amount as 50 percent of 40 is she correct

Answers

If you would like to know if Taylor is correct, you can calculate this using the following steps:

40% of 50 = 40% * 50 = 40/100 * 50 = 20
50% of 40 = 50% * 40 = 50/100 * 40 = 20

Result: Taylor is correct, because 40% of 50 equals to 50% of 40.

She is correct 40% is 50 because the answer is 125

0.1 is 10 times as much as

Answers

0.01.
To find the answer, just divide 0.1 by 10

0.1 is ten times as much as 0.01
this because 0.1/10=0.01 so 0.01x10=0.1

Please help. I'm stuck.

Answers

The root $√(10)$ can be converted into the power $10^{ (1)/(2) }$ . Therefore we can rewrite the problem as $(10^{ (1)/(2) } )^ {(3)/(4) x}$ and then follow the exponent rules about a power to a power, multiplying 1/2 and 3/4 together.

Thus the problem becomes $10^{(3)/(8)x}$ , which then can be turned into $\sqrt[8]{10} ^(3x)$ , making the last option our answer.

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