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2 years ago

9

A group of 7 campers has four hours to hike to a lighthouse and back before sundown. The lighthouse is 28 m high. It is located

12 km from camp. How fast do they have to walk?

1 answer:

VMariaS [17]2 years ago

6 0

I have no idea so sorry

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Alice and Betty each want to buy the same kind of ruler. But Alice is 22 cents short and Betty is 3 cents short. When they combi

goblinko [34]

Answer:

The rule could cost 24 cents at most.

Step-by-step explanation:

Let x cents be the price of the ruler.

Alice is 22 cents short, so Alice has x - 22 cents.

Betty is 3 cents short, so Betty has x - 3 cents.

When they combine their money they have

x - 22 + x - 3 = 2x - 25 cents.

This amount is still not enough, so

$2x-25$

Solve this inequality:

$2x-x$

The rule could cost 24 cents at most.

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2 years ago

A driver receives -25 points for each rule violation. What integer represents the change in points after 4 rule violations?

notka56 [123]

The integer is -100.

-25*4 = -100

6 0

2 years ago

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Helena uses a mixture of compost and topsoil in her garden. She purchased a total of 10 cubic yards of compost and topsoil for $

Annette [7]

Let C be the amount of compost

T be the amount of topsoil

Each compost cost = $25

Cost of C compost = 25C

Each topsoil cost = $15

Cost of T topsoil = 15T

Amount of compost + amount of topsoil = 10

C + T = 10 -------> Equation 1

cost of C compost + cost of T topsoil = 180

25C + 15T = 180 --------> equation 2

Solve the first equation for C

C + T = 10

C = 10 - T

Now plug it in second equation

25C + 15T = 180

25 ( 10 - T) +15T = 180

250 - 25T + 15T = 180 (combine like terms)

250 - 10 T = 180 (Subtract 250 on both sides)

-10T = 180 - 250

-10T = -70 ( divide by -10 on both sides)

T = 7

She purchased 7 cubic yards of topsoil .

4 0

2 years ago

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If cos28 = x/4, find x(3sf)

FinnZ [79.3K]

Cos28 = x/4 so to get rid of the fraction , multiply each side by 4 so it'll be
4cos28 = x
x = 3.531790371
Hope this helps=)

3 0

2 years ago

Kevin says that lines p and m will eventually intersect. Lines A and B intersect. Plane A contains lines p, m, and n. Line n is

ANTONII [103]

Answer:

No, because they are parallel.

Step-by-step explanation:

The lines $p$ and $m$ will not intersect, so Kevin is not correct.

It is given that planes A and B intersects. The plane A contains the line p, m and n on its plane. The lines p and m are parallel to each other. They are identical and move in the same direction.

Since the line p and m are parallel, they will not meet each other at any point because parallel lines does not intersect or meet at a point, they run parallelly along each other.

So, line p and m will not intersect.

Thus the answer is " No, because they are parallel."

8 0

2 years ago