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Firdavs [7]
1 year ago
10

Select the best method of finding an accurate solution to a system of linear equations.

Mathematics
1 answer:
a_sh-v [17]1 year ago
3 0

Answer:

Substitution. Substitution is a good method to use when one of the variables is isolated in the equation or the coefficient of one of the variables is 1 or -1. When you isolate that variable to substitute into the other equation, you will not be introducing additional fractions into the problem.

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What is 20÷1÷[(10÷5)÷2]
marysya [2.9K]

Answer: 20


Step-by-step explanation:

Follow order of operations (PEMDAS)

20÷1÷[(10÷5)÷2]     Given

20÷1÷[(2)÷2]            Do 10÷5 in parenthesis

20÷1÷[(1)]                 Do (2)÷2

20÷1                        Do 1÷[(1)]

20                           Do 20÷1, and that is your answer


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3 years ago
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Which expression is equivalent to<br> (5^-2)(5^-1)<br> A. -1/125<br> B. -1/5<br> C. 1/125<br> D. 1/5
n200080 [17]

Answer:

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Step-by-step explanation:

(5^-2)(5^-1) = 5^-3=1/5^3=1/125

3 0
3 years ago
For every 1 litre of water used to make a medicine, 269ml of sucrose and 47ml of saline solution are used. Express the amount of
leonid [27]

Answer:

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Step-by-step explanation:

A ratio is a way of comparing the value or amount of one quantity to another.

We are to find the ration of water to sucrose to saline solution, hence, it must remain in that order.

Water : Sucrose : Saline solution

The amount of water is 1 litre (1 * 1000 ml = 1000 ml)

The amount of sucrose is 269 ml

The amount of saline solution is 47 ml

Therefore, the ratio of water to sucrose to saline solution is:

W : S : SS = 1000 : 269 : 47

Since 1000, 269 and 47 have no common factors, that is the simplest form of the ratio.

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Answer:

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Step-by-step explanation:

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