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vladimir2022 [97]
3 years ago
5

Starting at home, Ishaan traveled uphill to the gift store for 18 minutes at just 10 mph. He then traveled back home along the s

ame path downhill at a speed of 30 mph.
What is his average speed for the entire trip from home to the gift store and back?
Mathematics
1 answer:
Tanzania [10]3 years ago
8 0
D=TxR
D=18 minutes x 10 miles/hr
D= 180 minutes miles / hr      1 hr/60 minutes
D= 3 miles

T= D/R    T= 3 miles/ 30 miles/ hr  T= 1/10/hr  6 minutes

It took Ishaan 24 minutes to go 6 miles so his average speed is D/T=R
6miles/24minutes=miles/hr  1 miles/4 minutes x 60 minutes/hr =  15 miles/hr
Ishaan's average speed was 15 mph.

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For the following geometric sequence find the recursive formula: {-1, 3, -9, ...}.
vredina [299]
First term (a1) is -1

recursive formula goes like this

a_n is the nth term
a_{n-1} is the term before that

we normally have a_n=f(a_{n-1})

we see each term is multipying by -3 to get next one


so that would be
a_n=-3*a_{n-1} where a1=-1


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3 years ago
1. a line with a slope of 1/3 passes through the point (3, 6) . which point also lies on this line?
valentina_108 [34]

1) Substituting into point-slope form, the equation of the line is y-6=⅓(x-3), which rearranges to:

  • y-6 = ⅓x - 1
  • y = ⅓x + 5

So, we can now substitute in the coordinates of each of the options to see which point lies on the line.

  1. 3 = ⅓(6) + 5 -> 3 = 7, which is false.
  2. 6 = ⅓(7) + 5 -> 6 = 22/3, which is false.
  3. -3 = ⅓(-3) + 5 -> -3 = 4, which is false.
  4. 3 = ⅓(-6) + 5 -> 3 = 3, which is true.

So, the answer is (4) (-6, 3)

2) Substituting into point-slope form, the equation of the line is y - 5 = ¾(x-2), which rearranges to:

  • y - 5 = 0.75x - 1.5
  • y = 0.75x + 3.5

So, we can now substitute in the coordinates of each of the options to see which point lies on the line.

  1. 8 = 0.75(6)+3.5 -> 8 = 8, which is true.
  2. 9 = 0.75(5) + 3.5 -> 9 = 7.25, which is false.
  3. 1 = 0.75(-1) + 3.5 -> 1 = 2.75, which is false.
  4. 2 = 0.75(6) + 3.5 -> 2 = 8, which is false.

So, the answer is (1) (6, 8).

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2 years ago
Mrs.Banks has 1/5 of a pot of coffe left. She wants to share the coffe equally among 5 people.What fraction of a pot of coffe wi
Shtirlitz [24]

Each person will receive 1/25 of a pot of coffee.

To find this you divide the fraction 1/5 by 5. When dividing a fraction by a whole number, you put the whole number over 1, flip the numerator and denominator (making it the inverse), then multiply the 2 fractions. So, instead of 1/5 divided by 5, you now have 1/5 times 1/5. Multiply straight across, 1 times 1 is one, and 5 times 5 is 25. Thus making the fraction 1/25.

I hope this helps!

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