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Aleonysh [2.5K]
4 years ago
7

20 POINTS!

Mathematics
1 answer:
Ainat [17]4 years ago
8 0
1.5, 2
When reflecting across the y-axis, the y in (x, y) stays the same but the x's sign is changed to the opposite.
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Help me with these problems (show work) thanks ❤️❤️
yanalaym [24]

Answer:

#1. 12x9x5+= 426

#2. 6x14.8= 784.14

#3. 6x6x8x8= 143.11

Step-by-step explanation:

Hoped that helped!

6 0
3 years ago
The diagram shows a solid formed by joining a hemisphere, of radius rcm, to a cylinder, of radius rcm and height hcm. The total
posledela

Answer:

Step-by-step explanation:

The total surface area of the sphere = 2πr²

Total surface area of the cylinder = 2πr²+2πrh

Total surface area of the solid = 4πr²+2πrh

r is the radius of the sphere and the cylinder

h is the height of the cylinder

Total surface area of the solid = 2πr(r+h)

If the total height of the solid is 18 cm, then r+h = 18cm

Given the Total surface area of the solid = 205π cm

205π = 2πr(r+h)

205π = 2πr(18)

205π = 36πr

205 = 36r

Divide both sides by 36

205/36 = 36r/36

r = 5.69cm

Since  r+h = 18cm

5.69+h = 18

h = 18-5.69

h = 12.31cm

6 0
3 years ago
What is the domain of the relation {(2, 8), (0, 8), (–1, 5), (–1, 3), (–2, 3)}?
lesya [120]
(2,0,-1,-1,-2) that is the domain from what I remember. Hope that help
6 0
3 years ago
Read 2 more answers
If you see these clouds in the sky, which type of weather might you expect?
UNO [17]
The answer to your question is thunderstorms.
The picture is filled with a lot of dark clouds, in which there will be a probability for thunderstorms to occur. We all know that when there is lightning, thunder will occur after it. With the photo given, there will be the probability of thunderstorm with heavy rain.
6 0
3 years ago
Truck A costs $600 more that Truck B. However, it burns 0.06 gallon/mile compared to 0.07 gallon/mile for truck B. Both trucks h
qwelly [4]

Answer:

  1,778

Step-by-step explanation:

Let C and S represent the cost and salvage value of Truck B, respectively. Let X represent the number of miles per year that answers the question.

Truck A's cost for 10 years is ...

  A = C+600 +(0.06)(2.25)(10X) -(S+200)

Truck B's cost for 10 years is ...

  B = C +(0.07)(2.25)(10X) -S

We want to find X such that Truck A's cost is lower, so ...

  C -S +1.35X +400 < C -S +1.575X

  400 < 0.225X

  1777 7/9 < X

1778 miles driven per year (or more) makes Truck A a better option.

5 0
3 years ago
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