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maw [93]
3 years ago
6

If y varies directly as x and y =4 when x=-4, what is y when x=-7?

Mathematics
1 answer:
Inga [223]3 years ago
6 0

Answer:

7

<em>good luck, i hope this helps :)</em>

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Two people are 100 feet apart on opposite sides of a tree. The angles of elevation from the people to the top of the tree are 30
cricket20 [7]
We need to solve for the height of the tree given two angles and distance between the two observers. See attached drawing for a better understanding of the problem.
We derive to equations using SOH CAH TOA such as below:
sin30 = h / x
sin 45 = h / (100-x)

sin 45 (100-x) = xsin30 
70.71 - 0.71x = 0.5x
70.71 = 1.21 x
x = 58.44

Solving for h, we have:
h = xsin30
h = 58.44 sin30
h = 29.22

The height of the tree is 29.22 feet. 

4 0
3 years ago
Read 2 more answers
The graph represents the rate of two machines that fill water barrels. One machine has already filled 30 water barrels before th
Katena32 [7]
The answer is B!
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5 0
3 years ago
Write the equation of the line passing through the point (3,5) with a slope of 2
Nady [450]
Y - y1 = m(x - x1)
y - 5 = 2(x - 3)
y - 5 = 2x - 6
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7 0
3 years ago
Seema bought a new pair of jeans that were on sale. The original price of the jeans was $56. The store had marked them down by 2
Serhud [2]

Given :

The original price of the jeans was $56.

The store had marked them down by 25 percent and Seema had a 20 percent off coupon as well.

To Find :

The price of the jeans before tax.

Solution :

Discount offered by store :

Discount = 0.25×56 = $14 .

Selling price = $( 56 - 14 ) = $42 .

Discount offered through coupon on selling price :

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Therefore, the price of the jeans before tax is $33.6 .

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5 0
3 years ago
The length of a hypotenuse of a 30 - 60 - 90 triangle is 11. what is the perimester
Pavlova-9 [17]

Since we know that the hypotenuse is 11 and this is a 30 - 60 - 90 right triangle we can use 11 to find the other sides.

The hypotenuse is 2s, s is the 30 side length.

So s = 11 / 2 = 5.5

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5.5 * square root of 3 = about 9.5.

Now that we know all three sides we can add them together to get the perimeter.

11 + 5.5 + 9.5 = 26

:)))

7 0
3 years ago
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