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Dominik [7]
3 years ago
7

X+2y=6 and x-y=3 solve by linear equations by substitution

Mathematics
1 answer:
nevsk [136]3 years ago
3 0
X+2y=6
x-y=3x=6-2y
x=3+y

6-2y=3+y
3=3y
y=1

x=3+1
x=4
Answer: (4;1)





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Answer:

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Step-by-step explanation:

<u>Claim</u>: it's a 90 degree rotation around the intersection of f and g.

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Nigel bought 10 pencils and 5 erasers for 8$. The price of 2
Jlenok [28]

Answer:

2 erasers cost <u><em>$1.20</em></u>

Step-by-step explanation:

Nigel bought 10 pencils and 5 erasers for $8.

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10p + 5e = 8

We know that the price of 2 pencils is $1. That is $0.50/Pencil.

So, p = $0.50. Now we can plug that into out equation and find the price of one eraser:

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4 0
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Which expression is equivalent to Negative 2 and one-fourth divided by negative two-thirds? StartFraction 9 over 4 EndFraction d
Tanzania [10]

Answer:

The correct answer is:

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i.e.

-\dfrac{9}{4} \div \dfrac{2}{3}

Step-by-step explanation:

We have to find equivalent expression to :

Negative 2 and one-fourth divided by negative two-thirds

i.e.

-2\dfrac{1}{4} \div \dfrac{2}{3} = ?

We have to convert the the mixed fraction form -2\frac{1}{4} to simpler \frac{p}{q} fraction form.

Let us learn the concept first.

Mixed fraction is combination of a whole number and a fraction.

Expression of the form a\frac{b}{c} have the following understanding:

c is the divider

b is the remainder and

a is the quotient.

To convert mixed fraction to fraction we can use the following:

a\dfrac{b}{c} = \dfrac{a \times c+b}{c}

\therefore -2\dfrac{1}{4} = -\dfrac{(2 \times 4+1)}{4} = -\dfrac{9}{4}

Hence

-2\dfrac{1}{4} \div \dfrac{2}{3} = -\dfrac{9}{4} \div \dfrac{2}{3}

i.e. the given expression is equivalent to :

Negative StartFraction 9 over 4 EndFraction divided by two-thirds

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Read 2 more answers
Hannah has a jar filled with 150 coins made up of quarters and nickels. The total value of the coins is $28.30
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Based on the given details above, here are the answers to your question.
If x represents the number of quarters in the jar, the equation that can be used to find the number of quarters is this <span>0.25x + 0.05(150 x) = 28.30.
Then, for the how many quarters and how many nickels are there, the answer is </span><span> 46 quarters; 104 nickels. Hope this answer helps. </span>
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