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Fynjy0 [20]
3 years ago
9

How do I solve systems by elimination

Mathematics
2 answers:
Otrada [13]3 years ago
6 0

Answer: The most frequent way you can use it is subtracting!

Step-by-step explanation:

Lorico [155]3 years ago
3 0
In order to use the elimination method, you have to create variables that have the same coefficient—then you can eliminate them. Multiply the top equation by 5. Now multiply the bottom equation by −3. Next add the equations, and solve for y.
You might be interested in
PLEASE HELP ASAP !!!
SSSSS [86.1K]

Answer:

The answer to your question is below

Step-by-step explanation:

From the picture we can infer that:

The side OP is proportional to NP, is half the length of NP.

The side QP is proportional to the side RP, is half the length of RP

The triangle OPQ is proportional to the triangle NPR because the have to proportional sides and the ∠P is the same for both.

Finally, if the triangles are proportional, the side OQ is proportional to the side NR. (is half the side of NR)

4 0
3 years ago
Algebra question I don’t get it because you usually have to multiple A by C but there is no C in the problem.
Misha Larkins [42]
Ok so basically, when you say multiply A by C, that is simplifying.

And in this case, you are factorising in this question. You turn back into brackets basically.

We have:
72x^2 - 32

x^2 = x squared

factorising means finding the factor of.

(Forget the x squared for the moment to make life easier)

Factors of 72:
1 and 72
2 and 36
3 and 24
4 and 18
6 and 12
8 and 9
(9 and 8 = it repeats so we stop there)

And then factors of 32:
1 and 32
2 and 16
4 and 8
(8 and 4 = repeats so we stop there)

Notice how we see 8 twice in both factors of 72 and 32, this means that we use 8 as the main number we are going to multiply each of the 2 numbers in the brackets by. This is because it is the biggest common factor - this is what we have!

This is what we would have:
8(9-4)

BUT, that is not the answer!
Keep in mind we have the x squared too

But, 32 doesn’t have it?!!

It would be:
8(9x^2 - 4)

Do you get it??

Try to simplify it! Does it equal to 72x^2 - 32?

(And I am so very sorry for the long explanation, once you get the hang of it, it makes sense. Hope my explanation helped) :)










6 0
3 years ago
a football was kicked vertically upward from a height of 4 feet with an initial speed of 65 feet per second. the formula h=4+65t
strojnjashka [21]

Answer:

70 feet

Step-by-step explanation:

Given

h=4+65t-16t^2

Required

Determine h when t = 2

Substitute 2 for t in the given equation

h=4+65 * 2-16* 2^2

Solve all exponents

h=4+65 * 2-16* 4

h=4+130-64

h=70

3 0
2 years ago
We are painting a rectangular wall of a large room. The dimensions of the wall are 35feet long and 21.5 feet wide. If the total
SVETLANKA909090 [29]

Answer:

56 cent per ft²

Step-by-step explanation:

Wall dimension = 35 feets * 21.5 feets

Total cost of paint used = 421.40

Area of wall = Area of rectangle = Length * width

Area of wall = 35 feets * 21.5 feets

Area of wall = 752.5 ft²

Cost of paint per square feet:

Total coast of paint / Area of wall

$421.40 / 752.5 ft²

= $0.56 per ft²

= 0.56 * 100 = 56

8 0
2 years ago
Please help I am struggling. ​
I am Lyosha [343]

Answer:

16in

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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