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3 years ago

4x-3y=10 x+2y=-14 solve the equation using the linear combination method

Mathematics

1 answer:

mafiozo [28]3 years ago

6 0

-2,-6 is the answer to the linear combination method

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10x+7=12x-5<br> what is x

Monica [59]

10x+7=12x-5
X equals 6

4 0

3 years ago

Solve sin 0 + 1 = cos20 on the interval 0 ≤ 0 < 2pi. Show work please!

yan [13]

Answer:

$\theta=\frac{\pi}{2},\frac{3\pi}{2}\frac{2\pi}{3}\frac{4\pi}{3}$

Step-by-step explanation:

You need 2 things in order to solve this equation: a trig identity sheet and a unit circle.

You will find when you look on your trig identity sheet that

$cos(2\theta)=1-2sin^2(\theta)$

so we will make that replacement, getting everything in terms of sin:

$sin(\theta)+1=1-2sin^2(\theta)$

Now we will get everything on one side of the equals sign, set it equal to 0, and solve it:

$2sin^2(\theta)+sin(\theta)=0$

We can factor out the sin(theta), since it's common in both terms:

$sin(\theta)(2sin(\theta)+1)=0$

Because of the Zero Product Property, either

$sin(\theta)=0$ or

$2sin(\theta)+1=0$

Look at the unit circle and find which values of theta have a sin ratio of 0 in the interval from 0 to 2pi. They are:

$\theta=\frac{\pi}{2},\frac{3\pi}{2}$

The next equation needs to first be solved for sin(theta):

$2sin(\theta)+1=0$ so

$2sin(\theta)=-1$ and

$sin(\theta)=-\frac{1}{2}$

Go back to your unit circle and find the values of theta where the sin is -1/2 in the interval. They are:

$\theta=\frac{2\pi}{3},\frac{4\pi}{3}$

7 0

3 years ago

Which is the correct label of the parallel lines?

fiasKO [112]

Answer:

just wanted to let you know that I will be a function of my heart and soul how many times a year are playing in math or how is it is a cell and I am a bit confused and private party for a function of my heart and soul how many times a year are playing in math or how is it is a cell and I am a bit confused and private party for a function of my heart and soul how many times a year are playing in math or 21st century history of my family and friends who have a function by the way that is the distance from Kathmandu on the distance answer is

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2 years ago

15% a football originally priced at $18.00

lesantik [10]

Answer:

2.7

Step-by-step explanation:

15% of 18.00 is 2.7

7 0

3 years ago

I need help with part b and c pretty p please show your work so I can do this

stiks02 [169]

It is black just letting u know

6 0

3 years ago