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Aloiza [94]
3 years ago
13

When do I use elimination and when do I use substitution?

Mathematics
1 answer:
lana [24]3 years ago
6 0
Elimination is used when there is a common factor between the two equations. Substitution is used in cases where finding a common term just isn’t possible, or too complicated.
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What is 62,810 rounded to the nearest
sweet-ann [11.9K]
62,810 rounded up is 60,00
3 0
3 years ago
A ship is carrying gold bars and silver bars in the ratio 13:17. The ship's load
andreyandreev [35.5K]

Using proportions, considering the weight of each bar and the ratio, it is found that the ship is carrying 52 gold bars.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

Each bar weighs 5 kg, and the total weight is of 600 kg, hence the number of bars is given by:

n = 600/5 = 120.

The proportion of gold bars is given by:

p = 13/(13 + 17) = 13/30

Hence, out of 120 bars, the number of gold bars is given by:

nG = 120 x 13/30 = 4 x 13 = 52.

More can be learned about proportions at brainly.com/question/24372153

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4 0
1 year ago
A rectangular block of copper metal has a mass of 1800 grams. The dimensions of the block
Hoochie [10]
Use formula p=m/v
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V volume
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P= 1800/160 after you divide you get 11.25
The density is 11.25
3 0
3 years ago
Y = 7x + 5<br> y = 7x - 3<br> These 2 lines are ?<br> O parallel<br> Operpendicular<br> Oneither
amm1812

Answer:

Parallel

Step-by-step explanation:

These 2 lines are parallel because they have the same slope (7).

8 0
3 years ago
Which of the following are solutions to | x-1|= 5x + 2 ? Check all that apply.
agasfer [191]

By definition of absolute value, if x-1\ge0, then |x-1|=x-1, so

|x-1|=5x+2\implies x-1=5x+2\implies4x=-3\implies x=-\dfrac34

On the other hand, if x-1, then |x-1|=-(x-1)=1-x, and

|x-1|=5x+2\implies1-x=5x+2\implies6x=-1\implies x=-\dfrac16

4 0
2 years ago
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