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Vera_Pavlovna [14]
3 years ago
11

Adalyn earns $42 for mowing lawns for 6 hours. If Adalyn charges at the same rate, how many hours will it takes her to earn $63

Mathematics
2 answers:
inessss [21]3 years ago
5 0
2 hours is how long it would take
ki77a [65]3 years ago
5 0
6hours is $42
x hours is $63

63 x 6 = 378
378/42 = 9

it will take her 9 hours
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I need help with homwork. (please) <br> On topic of exponents. Show all work
Blizzard [7]

Answer:

Step-by-step explanation:

Step-by-step explanation:

5:28^25 I think

6:keep the base multiply exponents

7:no because you would multiply the bases and keep the exponent the same

8:7 because 7 x 5= 35

1: 2 and 3 for the second part of it 2 and 5

2:7^30

3:54^3

4:Yes they are just flipped

5 0
3 years ago
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#9. Solve: 8x + 5 = 3x + 15<br><br> X = 4<br> x = 2<br> x = 20/11<br> x = 20
Jobisdone [24]

Answer:

x = 2

Step-by-step explanation:

8x + 5 = 3x + 15

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6 0
3 years ago
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jarptica [38.1K]
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8 0
3 years ago
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Given: 1; -5; -13 ; -23 ; ...<br><br> Derive a formula for the nth term in the pattern.
mylen [45]

Answer:

  f(n) = -n^2 -3n +5

Step-by-step explanation:

Suppose the formula is ...

  f(n) = an^2 +bn +c

Then we have ...

  f(1) = 1 = a(1^2) +b(1) +c

  f(2) = -5 = a(2^2) +b(2) +c

  f(3) = -13 = a(3^2) +b(3) +c

__

Here's a way to solve these equations.

Subtract the first equation from the second:

  -6 = 3a +b . . . . . 4th equation

Subtract the second equation from the third:

  -8 = 5a +b . . . . . 5th equation

Subtract the fourth equation from the fifth:

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  a = -1

Then substituting into the 4th equation to find b, we have ...

  -6 = 3(-1) +b

  -3 = b

and ...

  1 = -1 +(-3) +c . . . . . substituting "a" and "b" into the first equation

  5 = c

The formula is ...

  f(n) = -n^2 -3n +5

3 0
3 years ago
A mixture of concrete is made up of sand and cement in the ratio of 5:3.How many cubic centimeters of sand is needed to make 160
bazaltina [42]

Answer: 100\ cm^3

Step-by-step explanation:

Given

The ratio of mixture of sand and cement is 5:3

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Suppose there is 5x and 3x cubic centimeter of sand and cement respectively i.e.

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Sand 5x=5\times 20=100\ cm^3

So, there is 100\ cm^3 of sand in the mixture

3 0
3 years ago
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