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const2013 [10]
2 years ago
10

Solve the system of equations with substitution or elimination method. please help 2x+y=4 and 6x+7y=12

Mathematics
2 answers:
GuDViN [60]2 years ago
8 0

Answer:

x=2-y/2

y=12/7-6x/7

Step-by-step explanation:

klemol [59]2 years ago
4 0
I solved using elimination, multiplying the first equation by -3. My work is shown in the attached image.
x=2
y=0

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Lewis is 0.9 metres tall.<br>Tim is 0.15 metres taller than Lewis.<br>How tall is Tim?​
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D33Z NUTZ

Step-by-step explanation:

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3 years ago
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Find the geometric mean of 24 and 32
Maru [420]

Answer:

27√39

Step-by-step explanation:

To calculate the geometric mean we need to first of all multiply 24 and 32 and take the square root of it (i.e. 24*32 is 768, √768 is 27.712.....). However, in this case, we need to represent the answer in a simplified surd. To do this we need to find the highest possible perfect square that is below 768. Here it is 27 because 27*27 equals 729. Now we can go ahead and subtract 768 by 729. We get 39. So now we got two different surds. √729 and √39. We can simplify the √729 to 27. Thus our answer is the combination of both 27*√39 or 27√39.

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3 years ago
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A man ears $15.50 per hour with time and a half for overtime and he worked 46 hours during a recent week. Find his gross pay for
irina [24]

Answer:

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Step-by-step explanation:

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6 0
2 years ago
Please help me understand
nalin [4]

Answer:

  (x +2)(2x +1)

Step-by-step explanation:

The factors are the set of tiles down the left side: x + 1 + 1 = (x +2), and the set of tiles across the top: x + x + 1 = (2x +1)

Your factored form is shown in choice D:

  (x +2)(2x +1)

_____

<em>Additional comment</em>

The point of this sort of diagram is to show you how the factors work together to give you the product. Each tile in the middle of the figure represents the product of the tile on the top line and the tile in the left column.

The product of x and x is x².

The product of 1 and x is x.

The product of 1 and 1 is 1.

The product of the two factors is the sum of all the tiles in the middle of the diagram: 2x² +5x +2.

3 0
2 years ago
Andres went out to a restaurant for dinner. His total bill before tax and tip was $27.30. He was charged an additional 9% tax an
Fofino [41]

Answer:

$25.66

Step-by-step explanation:

Given data

Total Bill before tax and tip= $27.30

Tax= 9%

Tip= 15%

Let us find the tax

=9/100*27.30

=0.09*27.30

=$2.457

Let us find the tip

=15/100*27.30

=0.15*27.30

=$4.095

Therefore his bill after tax and tip is

=27.30+2.457-4.095

=$25.66

4 0
2 years ago
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