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elixir [45]
3 years ago
15

two submarines, one red and one blue, started rising toward the surface at the same time.they each rose at a constant speed. the

red submarine started rising from an altitude of 80 meters below the surface.after 30 seconds it was 60 meters below the surface.The following equation gives the altitude (in meters relative to the surface) of the blue submarine as a function of time (in seconds) A=-90+0.6t
Mathematics
1 answer:
Mnenie [13.5K]3 years ago
6 0

I NEED A BIT MORE DETAIL LOL

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In the diagram below, RSTU is a rectangle, and the two shaded regions are squares.
sdas [7]

Answer:

length PQ = 8.9 m  

Step-by-step explanation:

The picture below completes the question you  asked. From the picture above RSTU is a rectangle . The two shaded square has a length of sides 8 m and 4 m respectively. The legs of the triangle is the sides of the 2 squares. Therefore, the triangle is a right angle triangle. The adjacent side is 4 m while the opposite side is 8 m.

Using Pythagoras theorem the hypotenuse of the triangle can be calculated below.

Pythagoras theorem

c² = a² + b² Therefore,

c² = 4² + 8²

c² = 16 + 64

c² = 80

square root both sides

c = √80

c = 8.94427191

c ≈ 8.9 m

length PQ = 8.9 m  

7 0
4 years ago
Is x = 3 a function or is it not a function
likoan [24]

Answer:

No, it's not a function

Step-by-step explanation:

3 0
3 years ago
Mrs. Chesney bought 3 games at a cost of $14.99 each. What will she pay including 7% sales tax
max2010maxim [7]

Hey there!

The 3 games cost $14.99 each, so multiply to find the cost of the three combined without the tax (the subtotal).

14.99 × 3 = 44.97

To find the amount of tax she will have to pay, we must find 7% of 44.97, the price without the tax added to it (the subtotal).

100% = 1.0

7% = 0.07

Multiply 44.97 by 0.07 for the amount of tax.

44.97 × 0.07 = 3.1479

Add the tax to the cost of the games without tax (subtotal).

44.97 + 3.1479 = 48.1179

Round the amount to the nearest cent. The thousandths place is 7, so it gets rounded up.

The total she has to pay for the games is $48.12.

Hope this helps!

5 0
4 years ago
PLEASE HELP
Lemur [1.5K]

1. y=6

2. y=-12

Step-by-step explanation:

<u>1) If y varies inversely as x, and y=3 as x = -2, find y for the x value of -1.</u>

It is given that

y varies inversely as x

IT will be written as:

y∝1/x

Removing the proportionality symbol

y=k/x

Given

y=3 , x=-2

Putting the values

3=k/-2

k=3*-2 = -6

The equation will be:

y=-6/x

So,

When x=-1

y=\frac{-6}{-1}\\y=6

<u>2) If y varies directly as x, and y=15 as x=-3, find y for the x value of 4</u>

y is directly proportional to x

y∝x

y=kx

Given

y=15, x=-3

Putting the values

y=kx\\15=-3k\\k=\frac{15}{-3}\\k=-5\\The\ equation\ will\ be:\\y=-3xNow,\\x=4\\y=-3(4)\\y=-12

Hence,

1. y=6

2. y=-12

Keywords: Proportion, Variation

Learn more about proportion at:

  • brainly.com/question/5009365
  • brainly.com/question/5013374

#LearnwithBrainly

8 0
3 years ago
Can’t figure this out!
ale4655 [162]

Answer:

what does it say because i cant see

St ep-by-step explanation:

5 0
3 years ago
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