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finlep [7]
3 years ago
14

Solve for y in simplest form: y^2+3y-4=0

Mathematics
2 answers:
Effectus [21]3 years ago
8 0
y^2+3y-4=0 \\  \\ (y+4)(y-1)=0 \\  \\ y+4=0 \\ y=-4 \\  \\ y-1=0 \\ y=1 \\  \\ y=-4,1
Mashcka [7]3 years ago
5 0
Y^2+3y-4=o
y^2+4y-y-4=0
y(y+4)-1(y+4)=0
(y-1)(y+4)=o
y=1 or y=-4
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For his long distance phone service, Boris pays a $7 monthly fee plus 7 cents per minute. Last month, Boris's long distance bill
Allushta [10]
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2 years ago
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3 0
3 years ago
A van travelled at an average speed of 65km/hr from town A. A 35 minutes later a car started from town A ans drove along the sam
kobusy [5.1K]

Answer:

91.6 km/h

Step-by-step explanation:

Let v = average speed of van = 65 km/h and v' = average speed of car. Let t be the time the car starts to move. The van started 35 minutes earlier at t' = (t + 35/60) h.

Since distance d = vt where v = velocity and t = time, the distance moved by the van d = vt' = v(t + 35/60) and that moved by the car is d' = v't.

Since the car catches up with the van after it had moved a distance of 130 km,  d = d' = 130 km.

So d = v(t + 0.583)

Substituting d = 130 km and v = 65 km/h, we have

130 km = 65 km/h(t + 0.583)

130 km = (65t + 37.895 )km

subtracting 37.895 from both sides, we have

130 km - 37.895 km = 65t

92.105 = 65t

dividing both sides by 65, we have

t = 92.105/65

= 1.417 h

≅ 1.42 h

Since d = d' = v't,

v' = d'/t

= 130 km/1.42 h

= 91.55 km/h

≅ 91.6 km/h

So, the average speed of the car is 91.6 km/h

5 0
2 years ago
Please help me with 1,2,3,4​
aalyn [17]

Answer:

1. angle measure- 90 degrees

fraction of a whole turn- 4/12 or 1/4

2. angle measure- -90 degrees

fraction of a whole turn -4/12 or -1/4

3. angle measure- 360 degrees

fraction of a whole turn- 12/12 or 1 whole

4. angle measure- 180

fraction of a whole turn- 6/12 or 1/2

Step-by-step explanation:

8 0
3 years ago
Find the distance in km travelled by an aeroplane moving at 80mls for 5 mins<br>pls show steps:​
harina [27]

Answer:

24km

Step-by-step explanation:

distance = speed × time

speed = 80m/s

= 4.8km/min

time = 5mins

distance = 4.8 × 5

= 24km

5 0
3 years ago
Read 2 more answers
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