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3 years ago

Please answer quickly. 50 points. Answer 1. and 4. on statements and all of the reasons.

Mathematics

1 answer:

Keith_Richards [23]3 years ago

6 0

1. Is angle 2 and angle 5 are supplementary and the reason is the given
4. The answer is L || M because of the converse of the CIA theorem( corresponding interior angles)

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A ferry departs from a port along the Sands River at 10:00 am. The ferry travels at a speed of 15 mph in still water and returns

jek_recluse [69]

Answer:

Speed of river's current = 5 mph

Step-by-step explanation:

Let 'd' be the distance covered

Let x be the speed of the rivers current

Speed upstream = 15-x

speed downstream = 15+x

Time = distance / speed

time upstream = $\frac{d}{15-x}$

time downstream = $\frac{d}{15+x}$

the ferry trip upstream takes twice as long as its return trip downstream

$\frac{d}{15-x}$ = $\frac{2d}{15+x}$

divide both sides by d

$\frac{1}{15-x}$ = $\frac{2}{15+x}$

cross multiply

$15+x= 2(15-x)$

$15+x= 30-2x$

Add 2x on both sideds

$15+3x= 30$

subtract 15 from both sides and divide by 3

$3x=15$

x=5

Speed of river's current = 5 mph

8 0

3 years ago

A parachutist's speed during a free fall reaches 50 meters per second. What is this speed in feet per second? At this speed, how

BigorU [14]

50m ≅164 ft (3s.f.)

50m/s≅164 ft/s

distance after 20s:

d=164 ft/s ⋅20s

=3280ft

Hope This Helps!

7 0

1 year ago

Someone please help me on math please

Ratling [72]

The answer is 0.12 millimeters because if you multiplied the numbers it would give you 0.12 mm hope this is correct

5 0

2 years ago

Which ordered pair is a solution of the equation?

Leno4ka [110]

Yes papa papa daddy daddy lol yeah bye yeah yeah bye

6 0

2 years ago

HELP!!!! Find the area. Simplify your answer.<br> 552-9s<br> 3t2+t

Tems11 [23]

Answer:

A = (5s^2t - 9st) (3t + 1)

Step-by-step explanation:

(5s^2 - 9s) (3t^2 + t)

= 15s2t^2 + 5s^2t - 27st^2 - 9st

= 5s2t (3t + 1) - 9st (3t + 1)

= ( 5s^2t - 9st) (3t+1)

6 0

3 years ago