Mathematics
30.08.2020 13:15
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Steve is driving 440 miles to visit the grand canyon he drives at an average rate

Steve is driving 440 miles to visit the grand canyon he drives at an average rate of 55 mph explain how you could find the amount of time it will take steve to get to the grand canyon
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Dolphin56
Dolphin56
5,0(93 marks)

8 hour.

Step-by-step explanation:

because for it takes 1 hour for 55 miles .

so,

here, divide the 440/55 =8 hours.

explanation,

it takes 1 hour to complete the 55 miles and here we have to complete the 440 miles.

so, above we divide the 440 miles by 55 miles for hour. result =8 hour

to verify the answer.

you can multifly by 8 * 55 and result=440miles. because it is directily propotional.

for another to verify the answer.

dived the 440/8 and result comes=55 miles / hour.becauseit is directly propotional.

cyndy50
cyndy50
4,7(58 marks)
Simply solve for x:
-x^2 + 9 = 0 => x = 3 and x = -3;

plug x = 3 and x = -3 into the original equation you get 3 = 3 and -9 = -9, respectively;
So, the two intersecting points are (-3, -9), (3, 3).
And of course, the parabola opens down since its square term is minus.

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