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Snowcat [4.5K]
3 years ago
6

Can someone check my answers?

Mathematics
1 answer:
love history [14]3 years ago
3 0
1. 21(x-4)+2 = 21x - 84 + 2 = 21x - 82 (C is the correct answer) 
2. 5x-102 = 13; 5x = 115; x = 115/5; x = 23 (A is the correct answer)
 3. 2x-31=3(x+2); 2x-31=3x+6; -x=37; x=-37 (B is the correct answer)
 4. Correct answer is (-5, -1, 3, 7, 11). When each of the X values is put in the equation for Y, i.e. 4x-1. Thus: 4*(-1)-1=-5; 4*0-1=-1; 4*1-1=3; 4*2-1=7; 4*3-
1=11
 5. Slope is 3. y=3x-5
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3 years ago
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A jet travels from chicago to kansas city at a speed of 440 knots. If it takes a plane 3 hr longer to fly from kansas city to ch
steposvetlana [31]

d = distance between the two cities

v₁ = average speed while going from chicago to kansas city = 440 knots

t₁ = time taken to travel distance going from chicago to kansas city

time taken to travel distance going from chicago to kansas city is given as

t₁ = d/v₁

t₁ = d/440                                        eq-1


v₂ = average speed while going from kansas city to chicago = 110 knots

t₂ = time taken to travel distance going from kansas city to chicago

time taken to travel distance going from kansas city to chicago is given as

t₂ = d/v₂

t₂ = d/110                                                     eq-2


Given that :

t₂ = t₁ + 3

using eq-1  and eq-2

(d/110) = (d/440) + 3

d = 440

7 0
4 years ago
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Deli B has the better deal


Since 2 pounds cost 19.98, one pound would be 9.99 at Deli A

At Deli B, 3 pounds cost 23.97, meaning one pound costs 7.99
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