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Inga [223]
3 years ago
15

3 Which of the following points does not lie

Mathematics
1 answer:
Radda [10]3 years ago
8 0
I’m pretty sure the answer is b but not 100%
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An airplane takes 3 hours to travel a distance of 1680 miles with the wind. The return trip was 4 hours against wind. Find the s
nasty-shy [4]

Answer:

Speed of plane in still air: 490  mile/hour

speed of wind: 70  mile/hour

Step-by-step explanation:

still speed = x        wind speed = w

with wind: speed = still + wind

(x+w) * 3 = 1680     ...a

against wind: speed = still - wind

(x-w) * 4 = 1680    ...b

b-a ... 4x-4w-3x-3w = 0

x-7w = 0

x = 7w

substitution: (7w+w)*3 = 1680      8w = 560       wind speed (w) = 70

still speed (x) = 7w = 490 mile/hour

5 0
3 years ago
Bethany sells roses and petunias. The expression 3r+2.5p gives the cost (in dollars) of r roses and p petunias.What is the cost
Stella [2.4K]
3(7) + 2.5(8)
21 + 20
41

Hope this helps!
7 0
3 years ago
Read 2 more answers
(12,10),(-2,r), m=-4​
Savatey [412]

Answer:66

Step-by-step explanation:

Y=mx+b

10=-4*12+b

10=-48+b

b=58

r=-4(-2)+58

r=66

4 0
3 years ago
How many line segments are in the 20th figure?
Trava [24]
The first figure has 3 line segments.

the second figure has 3+3 =3*2 =  6 line segments

the third figure has 3+3+3 = 3*3 = 9 line segments

the fourth figure has 3+3+3+3=3*4=12 line segments...


so it is clear that:

the 20th figure has 3*20=60 line segments.


Answer: 60
5 0
3 years ago
an important step in science supporting a theory or idea with data the questions we ask help determine the type of data we colle
skad [1K]

Answer:

oh nah oh yea oh nah the answer is this the answer is that

Step-by-step explanation:

8 0
2 years ago
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