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QveST [7]
3 years ago
7

Answer both these questions and ill give the best answer brainliest

Mathematics
1 answer:
likoan [24]3 years ago
3 0

Answer:

Page 1:

A. exactly one solution

B. infinite many solutions

C. no solution

Page 2:

x = 3

Step-by-step explanation:

Page 1:

A. 3(x - 3) = 10x + 2

3x - 9 = 10x + 2

3x - 9 - 3x = -9

10x + 2 - 2 = 10x

-9 + 2 = -7

10x + 3x = 13x

-7 = 13x

13x / 13 = x

-7 / 13 = -7/13

B. -9x + 3 = -3(3x - 1)

-9x + 3 = -9x + 3

no matter what you'll end up with this

C. 2(3x - 1) = 6x - 1

6x - 2 = 6x - 1

there's no way to solve it :/

Page 2:

2/3x - 3 = 5

2/3x - 3 + 3 = 2/3x

5 - 3 = 2

2/3x = 2

2/3x / 2/3 = x

2 / 2/3 = 3

x = 3

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The sum of three consecutive odd numbers is 117. What is the smallest of the three numbers?
Ugo [173]
The first number would be represented by x, the second as
x+2 and the third as
x+4. Together they equal 117, so x+x+2+x+4= 117. You can sinplify that to equal 3x+6=117. You then solve for x (subtract the 6 from both sides to get 3x=111, and then divide both sides by 3 and you get x=37). The three numbers would be 37,39, and 41. The smallest is 37.
7 0
4 years ago
A metallic sphere is immersed in water in a cylindrical container causing a rise in the level of water by 7.5cm if the cylinder
SVETLANKA909090 [29]

Answer:

6.51 cm

Step-by-step explanation:

Since the sphere causes the water level in the cylindrical container to rise and thus increase by its own volume, the volume of the sphere is V = 4πr³/3 where r = radius of sphere. The volume rise of the container is thus    V' = πR²h where R = radius of base of cylinder = 7 cm and h = height of water level = 7.5 cm.

Since V = V',

4πr³/3 = πR²h

dividing through by π, we have

4r³/3 = R²h

multiplying both sides by 3/4, we have

r³ = 3R²h/4

taking cube-root of both sides, we have

r = ∛(3R²h/4)

Substituting the values of the variables into the equation, we have

r = ∛(3(7 cm)² × 7.5 cm/4)

r = ∛(3 × 49 cm² × 7.5 cm/4)

r = ∛(1102.5cm³/4)

r = ∛(275.625 cm³)

r = 6.508 cm

r ≅ 6.51 cm to 2 decimal places

3 0
3 years ago
A string of decorative lights is 28 feet long. The first light on the string is 16 inches from the plug. The lights on the strin
ANEK [815]
28 x 12 = 336
336 - 16 = 320
320 divided by 4 = 80
80
Lights
5 0
4 years ago
So can someone show there work in this one?
mihalych1998 [28]

just separate the ramge and domain

4 0
3 years ago
One night in January, the temperature in Alaska is -16℉. The next day, the temperature is half of what it was the night before.
Kipish [7]

Answer:

-8 degrees

Step-by-step explanation

Half of negative 16 would be negative 8.

3 0
4 years ago
Read 2 more answers
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