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3 years ago

True or False: Both equations have 'no solutions'. 15x +4-2x = 3(6x + 5) (2x-8)=(8x+36)

Mathematics

2 answers:

andrew11 [14]3 years ago

8 0

Answer:

False

Step-by-step explanation:

They both have 1 solution

15x + 4 = 3(6x +5)

15x +4 = 18x + 15 Multiple everything in the parentheses by 3.

4 = 3x + 15 Subtract 15 x from both sides

-11 = 3x Subtract 15 from both sides

-11/3 = x Divide both sides by 3

There is only one solution for this equation.

2x -8 = 8x + 36

-8 = 6x + 36 Subtract 2x from both sides

--44 = 6x Subtract 36 from both sides

-44/6 = x Divide both sides by 6.

There is only one solution for this equation.

skelet666 [1.2K]3 years ago

7 0

Answer:

false

Step-by-step explanation:

They both have solutions

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You are laying a concrete border around a circular pond ...The pond is 7 meters in diameter and is surrounded by a path 2 metres

nasty-shy [4]

Answer:

300 bags of 20 kg of premixed are required.

Step-by-step explanation:

Given:

diameter of pond 'd'= 7 m (given)

radius of inner border of pond 'r'= d/2= 7/2 m

The radius of outer circular border 'R'= r+2= 7/2+2= 11/2m

Area of concrete border around the circular pond= area of outer circle- area of inner circle

So, $\pi\times R^2-\pi\times r^2= \pi\times (R^2-r^2)$

=> 22/7 x ((11/2)²-(7/2)²)

=> 22/7 x (121/4-49/4)

=> $\frac{22}{7} \times \frac{72}{4}$

=> 56.57 m²

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Since 1 cube meter requires 106 x 20 kg bags,

2.8285 cubic meters require bags= 2.8285x106x20 kg

20 kg bags of premixed concrete required= 2.8285x106x20/20

=> 2.8285x106

=> 299.821 or 300 approximately

5 0

4 years ago

Divide. -24 divided by 7 Enter your question as a mixed number, in simplified form, in the box. Please hurry! Thank you :D

coldgirl [10]

Answer:

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Step-by-step explanation:

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3 years ago

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musickatia [10]

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STatiana [176]

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