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ELEN [110]
2 years ago
10

Evaluate piecewise functions

Mathematics
1 answer:
Vika [28.1K]2 years ago
5 0

Answer:

F(4) = 9

Step-by-step explanation:

Notice that for f(4), we need to use the function definition for the partitioned Domain that includes x = 4, and that is the expression :

f(x) = x^2-7

Therefore:

f(4) = 4^2-7 = 16-7 =9

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I just need help with 14,15,and the bonus
ira [324]

Answer:

9: a^8/c^2

Step-by-step explanation:

(a^4/c)^2

(a^8/c^2)

3 0
2 years ago
a boat can travel 30 miles upstream in the same amount of time you can travel 50 miles Downstream. If the speed of the current i
almond37 [142]
Speed, S = Distance (d) / Time (t) => S= d/t => t= d/S

Let the speed of boat in still water be x mph

Resulting speed upstream = x-4 mph for a distance of 30 miles
Resulting speed downstream = x-4 mph for a distance of 50 miles

Time taken in both distances is equal.
Therefore,

30/(x-4) = 50/(x+4) => 30(x+4) = 50(x-4) => 30x+120 = 50x-200 => 120+200 = (50-30)x => 20x = 320 => x=320/20 = 16 mph

The speed of boat in still water is 16 mph.


7 0
3 years ago
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You deposit $ 1200 in an account. The annual interest rate is 3%. How long will it take you to earn $108 in simple interest?
alukav5142 [94]
The correct answer is 3
5 0
3 years ago
Arthur has a balance of $2330 on his credit card, which he plans to pay off by
docker41 [41]

Answer:

$80

Step-by-step explanation:

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5 0
3 years ago
Help now now now!!!!!!!!!!!!!!
WARRIOR [948]
The answer is 2. Here's why:

First if all, anything to the power of 0 is 1.
So n^0=1.
You need to plug in 3 for m, so then 6(3)^-1.
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6 × 1/3= 6/3=2
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3 0
3 years ago
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