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lana66690 [7]
3 years ago
10

A student is trying to solve the system of two equations given below:

Mathematics
2 answers:
marissa [1.9K]3 years ago
6 0

Answer:

(y+z=6)*-3

Step-by-step explanation:

using this would make the top equation or (y+z=6) turn negative and would be this [-3y-3z=-18) using the distributive property. Since the bottom equation has a positive 3y. The -3y from the top equation and 3y from the bottom ones cancel out leaving you with z=-17 when combining like terms.

SpyIntel [72]3 years ago
4 0

Answer:

c is the answer since you are trying to make the ys number (-/+) of the value the other y contains

(3) so you will multiply the first equation by -3 to be able to eliminate y

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Expand and combine like terms.<br> (3c^4-5c^6)^2
lora16 [44]

Answer:

9c^{8} -30c^{10} + 25c^{12}

Step-by-step explanation:

We can use formula (a-b)² = a² -2ab + b².

In our example a = 3c^4 and b = 5c^6

(3c^{4} - 5c^{6})^{2} = [3c^{4} ]^{2} - 2*3c^{4} *5c^{6} + [5c^{6}]^{2}=\\=9c^{8} -30c^{10} + 25c^{12}

4 0
2 years ago
What is the solution of the following system?
Yakvenalex [24]
<h3>Answer:  B) no solutions</h3>

===========================================================

Explanation:

Let's isolate the variable y in the first equation

-2x - y = 1

-2x = 1 + y

1+y = -2x

y = -2x-1

Then we'll plug this into the second equation

-4x - 2y = -1

-4x - 2(-2x-1) = -1

-4x + 4x + 2 = -1

0x + 2 = -1

0 + 2 = -1

2 = -1

We run into a contradiction. No matter what x value we pick, the last equation will never be true. This leads to a domino effect to cause the first set of original equations to never be true when considered as a system.

Therefore, this system is inconsistent. There are no solutions. These two lines graph out parallel lines that never intersect.

3 0
2 years ago
Company A is offering 2 1/2 pounds of chocolate for $32.50, while Company B is offering 2 3/4 of the same chocolate for $35.50
Ivan
Company B offers the lowest price.

Company A:
32.50/2.5 =
13

Company B:
35.50/2.75 =
12.90

3 0
3 years ago
Read 2 more answers
What is the similarity ratio of a cube with volume 2197 m3 to a cube with volume 512 m3?
aniked [119]
It would be 3,330 would be ur answer

4 0
3 years ago
Sandy purchased 3 pairs of shorts, 5 shirts, and 2 pairs of sandals. Which of the following expressions represents the number of
Tanya [424]
<span>These are combinations, you can't just treat it as numbers and you can't change the order you wear it I mean you can't use shorts for your feet for example.

The best and most correct answer among the choices provided by your question is the first choice which is <span>C(10, 3). The probability would be 3*5*2 which is equal to 30.</span></span><span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly.</span>
3 0
3 years ago
Read 2 more answers
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