1. Find the value of x. X+ 15.92 = 21.378

Mathematics

1 answer:

OLEGan [10]3 years ago

8 0

Answer:

x= 5.458

Step-by-step explanation:

x+15.92 = 21.378

- 15.92 - 15.92

x = 5.458

Helpful hint: You just have to use inverse opperation to solve these problems

So, basically the opposite of what it is.

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A spherical hot-air balloon has a diameter of 55 feet. When the balloon is inflated, the radius increases at a rate of 1.5 feet

abruzzese [7]

Answer:

The time it would take to inflate the balloon to approximately two-thirds of its maximum volume is approximately 46.90 minutes

Step-by-step explanation:

The given parameters are;

The diameter of the balloon = 55 feet

The rate of increase of the radius of the balloon when inflated = 1.5 feet per minute

We have;

dr/dt = 1.5 feet per minute = 1.5 ft/min

V = 4/3·π·r³

The maximum volume of the balloon = 4/3 × 3.14 × 55³ = 696556.67 ft³

When the volume is two-thirds the maximum volume, we have;

2/3 × 696556.67 ft³ = 464371.11 ft³

The value of the radius, r₂ at that point is found as follows;

4/3·π·r₂³ = 464371.11 ft³

r₂³ = 464371.11 ft³ × 3/4 = 348278.33 ft³

348278.333333

r₂ = ∛(348278.33 ft³) ≈ 70.36 ft

The time for the radius to increase to the above length = Length/(Rate of increase of length of the radius)

The time for the radius to increase to the above length ≈ 70.369 ft/(1.5 ft/min) ≈ 46.90 minutes

The time it would take to inflate the balloon to approximately two-thirds of its maximum volume ≈ 46.90 minutes.

4 0

3 years ago

I have one more Brainliest

Tresset [83]

Okay, so we need to find the price of the original shirt and the discounted shirt with the 5% tax.

5% (into a real number) is .05

Multiply 20.98 and 15.48 by .05

20.98*.05= 1.049 I am going to round to 1.05

15.48*.05= 0.774 I am going to round to .75

Now we know the prices of both, so we subtract them by each other.

20.98+1.05= 22.03
15.48+.75= 16.23

22.03-16.23= 5.80

But since we rounded the numbers, I would go with choice D.

Hope this helps!

7 0

4 years ago

Find coordinates for x+5y=10 and 3x+5y=0. I need to know how to do this plz explain.

maks197457 [2]

Answer:

(-5,3)

Step-by-step explanation:

Method

There are several ways you can do this, but one of the best ways is to use a graphing coordinate calendar. The most popular one is Desmos Graphing Calculator. I've attached an image of my work below using the system.

Answer

As you can see, both equations intersect at a certain coordinate point. This coordinate point is the point you need for the answer. The intersection is (-5,3).

I hope this helps. If you have any more questions, please feel free to post them and someone will be able to help you, whether it's myself or others. Please leave a like, rating, and if possible, Brainliest. Have a great day!