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eduard
3 years ago
9

Q4.

Mathematics
2 answers:
xenn [34]3 years ago
3 0

Answer:

Step-by-step explanation:

loris [4]3 years ago
3 0

Answer:

£2478.37 this is what I got, I'm not too sure whether it is right though

Step-by-step explanation:

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X + 7y = 21<br> x + 4y = 15<br> Solve the simultaneous equations
Mariulka [41]

<u>Answer</u>:

x = 7, y = 2

<u>Explanation</u>:

equations given:

x + 7y = 21

x + 4y = 15

make "x" the subject:

x + 7y = 21

x = 21 - 7y .........equation 1

x + 4y = 15

x = 15 - 4y .......equation 2

Solving both the equations simultaneously:

15 - 4y = 21 - 7y

-4y + 7y = 21 - 15

3y = 6

y = 6 ÷ 3

y = 2

If y is 2

Then x = 21 -7y;

x = 21 - 7(2)

x = 21 - 14

x = 7

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It's a geometric figure that is reflected across a line, creating a mirror image.
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3 years ago
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The square root of -12 × the square root of -9 (THIS IS AN ALGEBRA 2 QUESTION)
nlexa [21]

Answer:

\sqrt{-12} = 2\sqrt{3} i\\\sqrt{-9}= 3i\\3i * 2\sqrt{3}i = -6\sqrt{3

Step-by-step explanation:

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3 years ago
-11 - 5x = 6(5x + 4)
gavmur [86]

Answer:

x=-1

Step-by-step explanation:

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What is a unit rate?
Semmy [17]

Answer:

The numbers or measurements being compared are called the terms of the ratio. A rate is a special ratio in which the two terms are in different units. ... When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates.

Step-by-step explanation:

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3 years ago
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