3 years ago

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Mathematics

1 answer:

Ira Lisetskai [31]3 years ago

8 0

Answer:

its (B) 80

Step-by-step explanation:

i got it right

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Answer:

Class A costs $41 per class so to have a greater value than B you have to attend the class 2 times.

Step-by-step explanation:

41*2= $82

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2 years ago

Anni [7]

Answer:

4/5

Step-by-step explanation:

$800 - 160 = 640 \\ \frac{640}{800} = \frac{4}{5}$

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Answer:

Step-by-step explanation:

answer is C the y intercept is (0,3)

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So the answer would be16*4=64

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3 years ago

Louisa ran at an average speed of five miles per hour along an entire circular park path. Calvin ran along the same path in the

docker41 [41]

Answer:

15 miles

Step-by-step explanation:

Let $x$ be the miles in the circular park path, $t_{L}$ the time Louisa takes to finish and $t_{C}$ the time Calvin takes to finish both in hours.

Then $x$ , the longitude is equal to the velocity times the time used to finish. So

$x=5t_{L}$

$x=6t_{C}$

And the difference between Louisa's time and Calvin' time is 30 minutes, half an hour. So:

$t_{C}=t_{L}-0.5$

Three equations, three unknowns, the system can be solved.

Equalizing the equation with x :

$5t_{L}=6t_{C}$

In this last equation replace $t_{C}$ with the other equation and solve:

$5t_{L}=6(t_{L}-0.5)\\ 5t_{L}=6t_{L}-3\\ 3=6t_{L}-5t_{L}\\ 3=t_{L}\\ t_{L}=3$

With Louisa's time find x:

$x=5t_{L}\\ x=5(3)\\ x=15$

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3 years ago