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Nonamiya [84]
3 years ago
15

MONEY Mrs. Rockwell lost money on

Mathematics
1 answer:
Rzqust [24]3 years ago
4 0

Answer:

the answer is $56

Step-by-step explanation:

2 weeks = 14 days

14 (days) x $4 (per day) = 56

the change over 2 weeks is $56

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If (n+1)!=90×(n-1)!,find n.​
Helen [10]

 

\displaystyle\bf\\(n+1)!=90\times (n-1)!\\\\(n-1)!\times n\times(n+1)=90\times (n-1)!~~~\Big|~:(n-1)!\\\\n(n+1)=90\\\\n(n+1)=9\times10\\\\n(n+1)=9(9+1)\\\\\implies~~\boxed{\bf n=9}

 

4 0
2 years ago
In 2 years i will be twice as old as i was 20 years ago how old am I?
Vsevolod [243]
You are going to be 40 years old.
Twice = 2
2 times 20 is 40.
7 0
3 years ago
Read 2 more answers
PLEASE ANSWER
Anni [7]

x is the independent variable.

y is the dependent variable.

-3 is the rate of change (slope).

-7 is the initial value.

Step-by-step explanation:

The form of the linear relation is y = m x + b, where

  • m is the rate of change (slope)
  • b is the initial value(value of y at x = 0)
  • x is the independent variable
  • y is the dependent variable

∵ The equation of the line is y = -3 x - 7

- Compare it with the form above

∴ m = -3

∵ m is the rate of change

∴ The rate of change is -3

∴ b = -7

∵ b is the initial value

∴ The initial value is -7

∵ y depends on x

∴ x is the independent variable

∴ y is the dependent variable

x is the independent variable.

y is the dependent variable.

-3 is the rate of change (slope)

-7 is the initial value.

Learn more:

You can learn more about the linear equations in brainly.com/question/4152194

#LearnwithBrainly

7 0
2 years ago
For f(x) = -5x + 4, what is the value of x for which f(x) = 20
Andru [333]

Answer:

- 3.2

Step-by-step explanation:

- 5x + 4 = 20

- 5x = 20 - 4

- 5x = 16

x = 16 / - 5

x = - 3.2

4 0
3 years ago
Tim drove 217 miles in 3.5 hours. Emily drove 244 miles in 4 hours. Who drove faster?
Naya [18.7K]

Answer:

Tim

Step-by-step explanation:

Tim drove 62 miles per hour you get this by dividing 217 by 3.5 and then you divide Emily's. 244/4 and you get 61

8 0
2 years ago
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