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3 years ago

Solve inequality -7(y+6)+33<3(5-y)

Mathematics

1 answer:

AysviL [449]3 years ago

6 0

So firstly, you want to foil -7(y+6) and 3(5-y): $-7y-42+33$

Next, combine like terms: $-7y-9$

Next, add 7y on both sides: $-9$

Next, subtract 15 on both sides: $-24$

Lastly, divide both sides by 4, and your answer will be -6 < y

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What is the mean of: 3.7, 5, 9.2, 4, 6.1, 5, 2.6, 4, 5.2, 5?

mart [117]

Answer:

4.98

Step-by-step explanation:

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3 years ago

In Exercises 23–36, solve the system using either Gaussian elimina- tion with back-substitution or Gauss-Jordan elimination. 23.

Luba_88 [7]

Answer:

23) x= 3, y = 4

24) Any (x,y) values where x = 1.5 - 2y

Step-by-step explanation:

For the first system(23), it goes like this

[1 2 | 7]

[2 1 | 8]

We need to do L2 = L2 - 2L1, so now it is

[1 2 | 7]

[0 -3 |-6]

So, now we have:

-3y = -6 *(-1)

3y = 6

y = 2

x + 2y = 7

x + 4 = 7

x = 3

Now for system 24, we have:

[-1 2 | 1.5]

[2 -4| 3]

We do L2 = L2 + 2L1, so we have:

[-1 2 | 1.5]

[0 0| 0]

So there are infinite solutions for this system. The solution for this system will be each (x,y) pair where x = 1.5 - 2y.

5 0

3 years ago

I’m usually pretty good at these but I cant seem to figure this one out. My answer is 40 every time and I’ve worked it 3 times

slava [35]

Hope this answer helps :)

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2 years ago

What’s the Answer to this

9966 [12]

Answer: the answer to this is 5n

5 0

3 years ago

Read 2 more answers

Solve for x and y

BigorU [14]

You can use elimination
7x - 3y = 4
-10x + 3y = 2
Add both equations
-3x = 6, x = -2
Plug in -2 for x in one equation
7(-2) - 3y = 4
-14 - 3y = 4
-3y = 18, y = -6
Solution: x = -2, y = -6

4 0

2 years ago