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mafiozo [28]
3 years ago
14

Solve the equation 18x - 9 = 5+ 12x

Mathematics
1 answer:
Hitman42 [59]3 years ago
8 0

Answer:

x = 2\frac{1}{3}

Step-by-step explanation:

Try to get x alone on one side

 Add nine to both sides

18x - 9 = 5 + 12x

     + 9 + 9

Subtract 12x from both sides  

  18x = 14 + 12x    

   -12x          -12x

Now that you have x alone on one side divide both sides by 6

    6x = 14

\frac{6x}{6} = \frac{14}{6}

x = 2 \frac{2}{6} or 2 \frac{1}{3}

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What is the value of x?
Alexus [3.1K]

Answer:

x = 22.5

Step-by-step explanation:

\frac{BH}{DH}  =  \frac{HM}{HT}  \\  \frac{6}{15 + 6}  =  \frac{9}{9 + x}  \\  \frac{6}{21}  =  \frac{9}{9 + x}  \\ 6(9 + x) = 9 \times 21 \\ 54 + 6x = 189 \\ 6x = 189 - 54 \\  6x = 135 \\ x =  \frac{135}{6}  \\ x = 22.5

5 0
3 years ago
6
qwelly [4]
28% of 1500 is 420.

so add it to 1500 and you’ll get 1920
7 0
2 years ago
A solid piece of wood shaped as a cylinder with an 8-centimeter diameter is cut as shown.
zhuklara [117]

Answer:

The surface area of the figure is 96 + 64π ⇒ 1st answer

Step-by-step explanation:

* Lats revise how to find the surface area of the cylinder

- The surface area = lateral area + 2 × area of one base

- The lateral area = perimeter of the base × its height

* Lets solve the problem

- The figure is have cylinder

- Its diameter = 8 cm

∴ Its radius = 8 ÷ 2 = 4 cm

- Its height = 12 cm

∵ The perimeter of the semi-circle = πr

∴ The perimeter of the base = 4π cm

∵ The area of semi-circle = 1/2 πr²

∴ The area of the base = 1/2 × π × 4² = 8π cm²

* Now lets find the surface area of the half-cylinder

- SA = lateral area + 2 × area of one base + the rectangular face

∵ LA = perimeter of base × its height

∴ LA = 4π × 12 = 48π cm²

∵ The dimensions of the rectangular face are the diameter and the

   height of the cylinder

∴ The area of the rectangular face = 8 × 12 = 96 cm²

∵ The area of the two bases = 2 × 8π = 16π cm²

∴ SA = 48π + 16π + 96 = 64π + 96 cm²

* The surface area of the figure is 96 + 64π

5 0
3 years ago
Read 2 more answers
What expression is equivalent to 3.5x + 4.8
Crazy boy [7]

Answer:

3.5x + 4.8 = (3 + 0.5) x+ (4+ 0.8) = 3.x + 0.5x + $ 0.8

Step-by-step explanation:

7 0
2 years ago
Pls Helppppp meeeeee!!​
Nookie1986 [14]

Answer:

G

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

Simplifying the radicals in the expression

\sqrt{52}

= \sqrt{4(13)}

= \sqrt{4} × \sqrt{13}

= 2\sqrt{13}

------------------

\sqrt{117}

= \sqrt{9(13)}

= \sqrt{9} × \sqrt{13}

= 3\sqrt{13}

Then

\sqrt{52} + \sqrt{117}

= 2\sqrt{13} + 3\sqrt{13}

= 5\sqrt{13} → G

5 0
3 years ago
Read 2 more answers
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