The speed of the airplane is the ratio of the distance to the time
The initial average speed of the airplane is approximately 110.8 mph
Reason:
Given parameters are;
The distance between Portland Oregon and Seattle Washington = 145 miles
The decrease in travel time when the speed is increase by 20 mph = minutes
The initial speed of the airplane, v = Required;
Solution;
Therefore;
Which gives;
Therefore
0.2·v² + 4·v - 2,900 = 0
v ≈ ±110.8 mph
The initial average speed of the airplane, v≈ ± 110.8 mph
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Answer:
20
Step-by-step explanation:
Because 21.50 x 20 =430
and 18 x 20 = 360
then you add 70 to 360 and you get 430
so Katrina would have to order 20 shirts from each company in order for the cost to be the same.
Answer:
Abby's mother spent $9.75 for the classroom not including tax.
Step-by-step explanation:
Know:
5 bags for 1 dollar
10 candy bars for 50 cents
3 whistles for 75 cents
5×6=30
10×3=30
3×10=30
- 5 times 6 is thirty. So find the product of 6 and 1 which is 6. 6 is the overall cost of bags.
- 10 times 3 is 30. So find the product of 3 and .50 which is 1.50. 1.50 dollars is the overall cost of candy bars.
- 3 times 10 is 30. You then find the product of 3 and .75. The product of this is 2.25 which is the total cost of whistles.
- Next you add all the values together which are 6.00 + 1.50 + 2.25 this equals $9.75
Answer:
<h2>
a. $8.83</h2><h2>
b. $136.83</h2><h2>
The second option will be the right answer.</h2>
Step-by-step explanation:
a.
The total tax which is need to be paid is 6.9% of the listed price.
6.9% of 128 = 
= 8.832 ≅ 8.83
b.
The person, who is going to buy a pair of boots, needs to pay the listed price as well as the required tax.
The total cost of the pair of boots is = listed price + tax = $(128 + 8.83) = $136.83
