3 years ago

Which of the following relations or graphs are functions

Mathematics

2 answers:

AfilCa [17]3 years ago

8 0

Answer:

Step-by-step explanation:

The functions are:

(a), (c), (d), (e).

Alisiya [41]3 years ago

3 0

Answer:

a, d, and e

Step-by-step explanation:

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A boat travels 30 miles up the river in the same amount of time it takes to travel 38 miles down the same river. If the current

Ksenya-84 [330]

X miles per hour - speed of the boat in still water
(x - 2) - speed up the river
(x + 2) - speed down the river

$\frac{30}{x - 2}$ = $\frac{38}{x + 2}$
30 * (x + 2) = 38 * (x - 2)
30x + 60 = 38x - 76
- 8x = - 136
x = 17 miles per hour - the speed of the boat in still water.

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3 years ago

PLEASE HURRY 9x^2 + 64 = 0 I NEED THE WORK SHOWN IN ORDER TO GET CREDIT

seropon [69]

Answer:

x = ± $\frac{8}{3}$ i