To solve a three-variable system of equations, you can use a combination of the elimination and substitution mehtods.True or False ...?

Answers

Answer 1

Answer: It is true that in order to solve a three-variable system of equations, you can use a combination of the elimination and substitution methods.
This is the best way to solve these kinds of equations, as you get rid of the unnecessary variables.

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Find the value of n. 19n-57=76

Answers

19n-57=76

You must get "n" by itself

19n-57+57=76+57 (add 57 to each side)

19n=133

Divide 133 by 19

133÷19=7

n=7

Does the equation y=x/2
represent a proportional relationship?

Answers

Answer:

Yes, y=x/2 is a proportional relationship.

Step-by-step explanation:

As x increases, y increases too.

Answer:

Yes

Step-by-step explanation:

y=.5x

Mr Taylor brought back 180 Euros to the UK. The exchange rate was €1.2 to £1. How much did he get in £ sterling?

Answers

The answer is £150.

This could be calculated using proportion. If £1 is €1.2, how many £ is €180:
£1 : €1.2 = x : €180
x = £1 ÷ €1.2 × €180
x = £150

A1 + a2 + a3 + a4 + a5

Answers

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On June 1, 2007, there were about 18.75 hours of daylight in Anchorage, Alaska. On November 1, 2007, there were about 8.5 hours of daylight. What was the percent decrease

Answers

Answer:

54.67%

Step-by-step explanation:

18.75 -8.75 x 100% = 54.67

18.75

To convert drams to grams, multiply the number of drams by which number?

Answers

"Dram" is a unit of volume, whereas "gram" is a unit of mass.
They can't be directly converted. If they both refer to a sample
of some substance, then the conversion depends on the density
of the substance. All we can say for sure by way of an answer is:
To change 'drams' to 'grams', replace the 'd' with 'g'.

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