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JulijaS [17]
3 years ago
13

System with 3 variable. solve pleaseeee x+4y-5z=-7 3x+2y+3z=7 2x+y+5z=8

Mathematics
1 answer:
7nadin3 [17]3 years ago
6 0
To solve this we need to form 2 equations with only 2 variables.
x+4y-5z=-7
2x+y+5z=8
3x+5y=1

15x+10y+15z=35
6x+3y+15z=24
9x+7y=11

Now we need to use these to find x and y
9x+15y=3
9x+7y=11
8y=-8
y=-1
Therefore:
x=2
From this we can find that:
2(2)-1+5z=8
Therefore z=1
The answer is x=2, y=-1, z=1
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Can someone solve this for me?
Sav [38]

Answer:

9

Step-by-step explanation:

9 is 3/4*12.

3 0
3 years ago
If f(x)=x^2 is horizontally compressed to g(x), which could be the equation of g(x)?
leva [86]

For the definition of <em>horizontal</em> compression, the function f(x) = x² is horizontally compressed to the function g(x) = (k · x)², for 0 < k < 1.  

<h3>How to find the resulting equation after applying a compression</h3>

Here we must narrow a given function by a <em>rigid</em> operation known as compression. <em>Rigid</em> transformations are transformations in which <em>Euclidean</em> distances are conserved. In the case of functions, we define the horizontal compression in the following manner:

g(x) = f(k · x), for 0 < k < 1     (1)

If we know that f(x) = x², then the equation of g(x) is:

g(x) = (k · x)², 0 < k < 1

For the definition of <em>horizontal</em> compression, the function f(x) = x² is horizontally compressed to the function g(x) = (k · x)², for 0 < k < 1.      

To learn more on rigid transformations: brainly.com/question/1761538

#SPJ1

5 0
2 years ago
H(x+1)=x^2-4 evaluate function by substuting x+1
zalisa [80]

Answer:

h(x + 1) = (x+3)(x-1)

Step-by-step explanation:

Simply plug the value of x+1 into the equation for x.

h(x) = x^2 - 4

h(x + 1) = (x + 1)^2 - 4

h(x + 1) = x^2 + 2x + 1 - 4

h(x + 1) = x^2 + 2x - 3

h(x + 1) = (x+3)(x-1)

Cheers.

8 0
4 years ago
Read 2 more answers
The following picture shows two gears meshed together with the arrows lined up. Gear A has 48 teeth, while gear B has 28 teeth.
spin [16.1K]

Answer:  12

<u>Step-by-step explanation:</u>

The LCM of 48 and 28 is 336

It would take 336 ÷ 28 = 12 revolutions of gear B

and 336 ÷ 48 = 7 revolutions of gear A

to match up the arrows.

3 0
4 years ago
Can anybody help me with 1 and 2
Anit [1.1K]
1) x \geq 96
2) x\ \textless \ 38

Here, the variable x can assume any value, and usually an inequality presented like this has x as a stand-in for all real numbers. If we really wanted to make that fact clear, we could write the two inequalities like this:

x \geq 96, x\in\mathbb{R}\\ x\ \textless \ 38, x\in\mathbb{R}

Formally, you'd read x\in\mathbb{R} as "x is an element of the set of real numbers," which is a fancy way of saying that x can be any real number.
8 0
3 years ago
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