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3 years ago

An object travels 8 miles in 20 minutes at a constant speed. What is the

Mathematics

1 answer:

strojnjashka [21]3 years ago

6 0

Answer: 24miles/hour

Step-by-step explanation: Speed is the change in distance of a body with respect to time.

Speed = Distance/tIme

Given parameters

Distance = 8miles

TIME = 20minutes

Convert minutes to hour

since 60minutes = 1hr

20 min = x

cross multiply

20 = 60x

x = 20/60

x = 1/3

Hence 20mins = 1/3 hr

Speed = 8miles/(1/3)hr

speed = 8 miles * 3/1 hr

speed = 24 miles/hr

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Answer:

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Step-by-step explanation:

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2 years ago

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-4x-2y=-12 4x+8y=-24

Alla [95]

Answer:

$x=6\\ \\y=-6$

Step-by-step explanation:

Given the system of two equations:

$\left\{\begin{array}{l}-4x-2y=-12\\ \\4x+8y=-24\end{array}\right.$

Add these two equations (left side add to left side and right side add to right side):

$-4x-2y+4x+8y=-12+(-24)\\ \\-2y+8y=-12-24\\ \\6y=-36\\ \\y=-6$

Substitute $y=-6$ into the first equation:

$-4x-2\cdot (-6)=-12\\ \\-4x+12=-12\\ \\-4x=-12-12\\ \\-4x=-24\\ \\x=6$

8 0

3 years ago

12. Sydney Star bought a new sweatshirt for $42.00. Sales tax was 8%.

levacccp [35]

Answer:

$45.36

Step-by-step explanation:

100 + 8 = 108

42/100 X 108 = 45.36

6 0

2 years ago

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Bo, Ryan and Zach walked 1/4 miles from school to Bo’s house. They walked 4/6 miles from Bo's House to the park what is the tota

BigorU [14]

Answer: They walked 11/12 miles

Step-by-step explanation:

1/4 + 4/6

3/12 + 8/12

11/12

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3 years ago

A company charges $10 for shipping and $7 per shirt.

djverab [1.8K]

Answer:

i think the answer is 6 shirts

Step-by-step explanation

52 -10 because shipping cost 10$

and then 42 divided by 7$

and you get six

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3 years ago