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3 years ago

Justify each step in solving the equation 6x = 3 (x + 4) by writing a reason for each statement.

Mathematics

1 answer:

BaLLatris [955]3 years ago

6 0

First thing is to multiply 3 by x and get 3x,then 3 by 4 equals 12. 3x+12....6x=3x+12...subtract 3x from 6x and get 3x=12..then divide 3 on both sides and 3x crosses out.. and x=4...this is what I have to say about this..

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Which of the following expressions is equal to -3x^2-12??!!! please help him

Andreyy89

Answer:

-3 ( x+2i) (x-2i)

Step-by-step explanation:

-3x^2-12

Factor out a -3

-3(x^2 +4)

Rewrite

-3 ( x^2 - -4)

-3 ( x^2 - (-2i)^2) This is the difference of squares ( a^2 -b^2 ) = (a-b)(a+b)

-3 ( x- -2i) (x+2i)

-3( x+2i) (x-2i)

3 0

3 years ago

When he was measuring herbs on his balance scale, Neville placed a 1/2 gram weight, then a 1/5 gram weight, and finally a 1/8 gr

Delvig [45]

Answer: $\dfrac{33}{40}\ gm$

Step-by-step explanation:

Given

Neville place three weights in the sequence

$\dfrac{1}{2}\ gm,\dfrac{1}{5}\ gm,\dfrac{1}{8}\ gm$

The total weight of the three weights is

$\Rightarrow \dfrac{1}{2}+\dfrac{1}{5}+\dfrac{1}{8}=\dfrac{20+8+5}{40}\\\\\Rightarrow \dfrac{33}{40}\ gm$

Thus, herbs weigh $\frac{33}{40}\ gm$

8 0

3 years ago

ANSWER FAST PLEASE WHORVER IS FIRST GETS BRAINLIEST

nata0808 [166]

Answer:-3/5

Step-by-step explanation:

rise/run

8 0

2 years ago

Mr Baffoe's farm is 20 km from his house . He uses his car to travel y km of the distance from his and walks<img src="https://te

Bogdan [553]

Answer:

$y = 15.5$

Step-by-step explanation:

Given

$Total\ Distance = 20km$

$Walks\ Hours= \frac{3}{2}\ hours$

$Walks\ Rate = \frac{3km}{1\ hour}$

Required

Determine the distance (y) covered by his car

First, we calculate the distance walked.

This is calculated as follows;

$Distance = Walk\ Hours * Walk\ Rate$

$Distance = \frac{3}{2}\ hours * \frac{3km}{1\ hour}$

$Distance = \frac{3}{2}* 3km$

$Distance = \frac{3* 3km}{2}$

$Distance = \frac{9km}{2}$

$Distance = 4.5km$

This means that he walked 4.5 km

The total distance can be expressed as a sum of distance covered while walking and distance covered by car.

i.e.

$Walk + Car = Total$

Make Car the subject

$Car = Total - Walk$

This gives

$y = 20 - 4.5$

$y = 15.5$

<em>Hence, his car travelled 15.5km</em>

6 0

2 years ago

2/5 how do I put this in to decimal by rounding to the nearest tenth

Crank

Step-by-step explanation:

0.4

hope this helps. :)......

8 0

3 years ago

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