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alexira [117]
3 years ago
14

(7x-y=7(x+2y=6 estimate the solution to the system of equations ​

Mathematics
1 answer:
jolli1 [7]3 years ago
8 0

Multiply the first equation by 2 to then use elimination by adding the 2 equations.

So, 14x-2y=14

+. x+2y=6

Equals 15x=20 so x=20/15=4/3

Plug in to first equation to get y

7(4/3)-y=7

28/3-y=7

28/3-y=21/3

So y=7/3

Plug both x and y into second equation to check

4/3+2(7/3)=

4/3+14/3=18/3=6 it works

So x=4/3, y=7/3

Hope this helps! Have a blessed day!

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Given triangle IMJ with altitude JL, JL = 32, and IL =24, find IJ, JM, LM, and IM.
svetlana [45]
Okay, so I really hope that you can read all my work. I just spent the last 45 mins doing this problem as neatly as possible with as much detail as possible. So, I really hope my work doesn't confuse you. 

My Final Answers were:
JI= 40 units (found using the Pythagorean theorem)
IM= 66.66 units = 66 and 2/3rds (found by dividing the length of JL by the cosine of ∠JIM )
LM=42.66 units = 42 and 2/3rds (found by IM= 24+LM; solve for LM since we know IM=66.66)
JM= 53.33 units= 53 and (1/3rd) (found by using the Pythagorean theorem; this time using JI as "a" and IM as c)

Hope this helped and all made sense!

(Pythagorean theorem is a²+b²=c²)


4 0
2 years ago
Read 2 more answers
The first term in a sequence of numbers is 1/2
Andrei [34K]

Answer:

The correct answer is C. The 4th term is 11.

Step-by-step explanation:

Since the next term is one more than twice the previous, we can calculate it by the following expression:

a_{n} = 2*a_{n-1} + 1

So the second term is:

a_2 = 2*\frac{1}{2} + 1\\a_2 = 2

The third term:

a_3 = 2*2 + 1\\a_3 = 5

And the fourth term:

a_4 = 2*5 + 1\\a_4 = 10 + 1 = 11

The correct answer is C. The 4th term is 11.

7 0
3 years ago
What is this??? 28÷7×4=?
Tanya [424]

Answer: 16

Step-by-step explanation: 28÷7=4

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7 0
2 years ago
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Answer:

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Step-by-step explanation:

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Combine like terms. 3y-4-6-3x-7y+6x+1
maks197457 [2]

Answer:

If you combine everything its <em>-4y+3x-9</em>

Step-by-step explanation:

4 0
2 years ago
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