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const2013 [10]
3 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]3 years ago
8 0

Answer:

x=2-y/2

y=12/7-6x/7

Step-by-step explanation:

klemol [59]3 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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1/2x=14<br> Help please I’ve been stuck on this how do I check it?
n200080 [17]
Divided both sides by 1/2
1/2x/(1/2)=14/(1/2)
x=14/(1/2)=14/0.5=28
The answer will be x=28
7 0
3 years ago
Find the area of a circle circumscribed about an equilateral triangle whose side is 18 inches long. 81 108 243
jekas [21]

Answer:

Area=339.2920in^2 \ or \ 108\pi \ in^2

Step-by-step explanation:

Area of circle is given as:

A=\pi\ r^2

Where r=radius

To find radius of a circle circumscribing an equilateral triangle, we use the expression

r=\frac{a\sqrt3}{3}

Where, a is the length of sides of the equilateral triangle. Therefore:-r=\frac{18\sqrt3}{3}\\r=6\sqrt3 \ or \ 10.3923in

We can then proceed and calculate the area of the circle as follows:-

A=\pi\ r^2\\A=\pi(10.3923)^{2}\\A=339.29\ or \ 108\pi

*The attached picture illustrates what the circumscribed equilateral triangle looks like

4 0
4 years ago
Pls help me and thanks
mojhsa [17]
Answer = 5.656854249

Step by step:

This equation is just a simple Pythagorean theorem ( if you were not aware, it’s a2 + b2 = c2. To get c is to find the square root of c)
5 0
4 years ago
Read 2 more answers
Please help!!! i'll mark you brainliest <br> 20 points (maths)
Mariulka [41]

Answer:

25,0000000000000pmc squared

Step-by-step explanation:

because it's math.

7 0
3 years ago
Need help on this please​
lys-0071 [83]

Answer:

I would it would be the one on the left

Step-by-step explanation:

If it did not would then add me and we can talk about it and I will explain to you why it is right.

6 0
2 years ago
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