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SOVA2 [1]
2 years ago
9

Ari and his 3 brothers want to take a school trip to Washington, D.C. They have $320 saved. Each of them will save $18 a week un

til they have at least $647 to pay for the trip. How much money will they save after 4 weeks? Will they have enough money to pay for the trip?
Mathematics
1 answer:
cupoosta [38]2 years ago
8 0

Answer:

$392.  No they don't have enough money to pay for the trip.

They need $255 more dollars, which would take 14 weeks and 2 days.

Step-by-step explanation:

18 x 4 = 72

320 + 72 = 392

647 - 392 = 255

255/18 = 14.2

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if you’re good with set theory and this sudoko puzzle in math 30 please help with question 33!! real answers only !!
Sidana [21]

Answer:  A) 2, 7, 9

<u>Step-by-step explanation:</u>

In a sudoku puzzle, there are three rules:

  1. Each vertical line must contain the numbers 1 - 9, with no duplicates
  2. Each horizontal line must contain the numbers 1 - 9, with no duplicates
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Using logic:

2 must go in the 1st box. It cannot go in the 2nd or 3rd shaded square because 2 is already in that 3 x 3 box.

That leaves the 2nd and 3rd shaded square.  

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Therefore, 9 must go in the 3rd shaded square.

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3 years ago
Given the function f(x) =3(x+2)-4, solve for the inverse function when x=2
Usimov [2.4K]

The inverse function is f(x) = \frac{x + 4}{3} - 2, which makes the inverse at x = 2 equal to 0.


All inverse functions can be found by switching the x and f(x) values. Once that is done, solve for the new f(x) value. The result will be the inverse of the original function. The step-by-step process is below.


f(x) = 3(x + 2) - 4 ----> Switch the x and f(x)

x = 3(f(x) + 2) - 4 ----> Add 4 to both sides

x + 4 = 3(f(x) + 2) ----> Divide both sides by 3

\frac{x + 4}{3} = f(x) + 2 ----> Subtract 2 from both sides.

f(x) = \frac{x + 4}{3} - 2


The end is your inverse function. So then we can evaluate when x = 2.


f(x) = \frac{x + 4}{3} - 2

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f(2) = \frac{6}{3} - 2

f(2) = 2 - 2

f(2) = 0

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