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Tatiana [17]
3 years ago
6

Solve the system of Linear equations by elimination

Mathematics
1 answer:
Delvig [45]3 years ago
3 0
With these, you pick either equation and a variable to solve for; let's solve for x using the 2nd eq: 3x - 4y = 11; 3x = 4y - 11; x = (4/3)y - (11/3).

Now, plug x into the first eq: 3( (4/3)y - (11/3) ) + 4y = 5; 4y -11 +4y = 5; 8y = 16; y = 2.

To get an actual number for x, plug in y into either equation and you should get x = -1.
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yan [13]
Your answer will be x= -4y/3 + 55/3
3 0
3 years ago
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What is the greatest factor of 60 and 75
Radda [10]

The greatest factor of 60 and 75 is 15.

Reasoning: I found the factors and prime factorization of 60 and 75. The biggest common factor number is the GCF number. So the greatest common factor 60 and 75 is 15.

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What does $1.99 $1.99; × 10 =
AlladinOne [14]

Answer:

I'm going to assume that the question was $1.99 × 10 because $1.99 $1.99; × 10 is not possible, so if that was the question, the answer would simply be false. The answer I got for $1.99 × 10 was 19.9

Answer: 19.9

8 0
3 years ago
Trig help please!!! This is due tomorrow. If you don’t mind could you please explain how you do it
vivado [14]

Answer:

The larger acute angle is equal to 50.8 degrees.

Step-by-step explanation:

Let's solve for both of the acute angles for the purpose of checking our work at the end with angle A being the top angle and angle B being the one on the base of the triangle (that's not the 90 degrees one). Determining whether to use sin/cos/tan comes from SOH-CAH-TOA.

A = cos^-1 (2√6/2√15)

However, you need to move the radical out of the denominator by multiplying √15 to the numerator and denominator. You should come up with (2√90)/30. So,

A = cos^-1 (2√90/30) = 50.768 degrees.

B = sin^-1 (2√90/30) = 39.231 degrees.

Now, we can check the work by adding the 2 angles to 90 and, if it comes to 180, it's right.

cos^-1 (2√90/30) + sin^-1 (2√90/30) + 90 = 180.

If you have any questions on where I got a formula or any step, feel free to ask in the comments!

8 0
3 years ago
1/2x + 3/2 (x + 1) - 1/4 = 5
kompoz [17]
The answer to your problem is x= 15/8 as decimal form it’s 1.875
6 0
2 years ago
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