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3 years ago

2x+y=3, 5x-2y=12 how to solve this

2 answers:

7 0

Start by getting one of the equations in terms of one variable, in this case lets put the first equation in terms of y

2x+y=3 ---> y=3-2x

now we plug that into the second equation

5x-2y=12 ---> 5x-2(3-2x)=12

we can then multiply and simplify

5x-2(3-2x)=12 ---> 5x-6+4x=12 ---> 9x-6=12 ---> 9x=18 ---> x=2

we can now plug x=2 into an equation to solve for y

2(2)+y=3 ---> 4+y=3 ---> y=-1

Brums [2.3K]3 years ago

7 0

2x+y=3 =4x+2y=6
5x-2y=12. =5x-2y=12
--------------------------------
9x=18: x=2
4+y=3:y=-1

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Solve pls brainliest

pogonyaev

Answer:

a) 52

B)6

Step-by-step explanation:

B) -5+11=6

It's not that hard, you shall know negative signs rules

4 0

3 years ago

Ce efect are formula=A5,din celula A1? Cand se modifica valoarea din A1?

coldgirl [10]

Buna,

Da. Daca esti in Excel si in celula A1 unui pui =A5, atunci celula A1 va prelua valoarea celului A5

Daca A5 e necompletat, asa va ramane si A1

3 0

3 years ago

A can of soda can be modeled as a right cylinder. Meena measures its radius as 2.6

aleksandrvk [35]

Given that the radius and volume of the cylinder are 2.6 cm, and 198 cm³

respectively, the height of the cylinder is approximately 9.3 cm.

<h3>How can the height of the cylinder be calculated?</h3>

Known parameters;

The shape of the soda can = A right cylinder

Radius of the can, r = 2.6 cm

Volume of the can, V = 198 cm³

Required:

The height of the can

Solution:

The height, <em>h</em>, of the can is found as follows;

V = π·r²·h

Which gives;

$h = \mathbf{ \dfrac{V}{\pi \cdot r^2}}$

Therefore;

$h = \dfrac{198 \, cm^3}{\pi \times (2.6 \, cm)^2} \approx \mathbf{9.3 \, cm}$

The height of the cylinder, h ≈<u> 9.3 cm</u>

Learn more about the volume of regular solids here:

brainly.com/question/13338580

4 0

3 years ago

If f(x)=5x-7 and g(x)√x-2 which statement is true?

nata0808 [166]

If f ( x ) = 5 x - 7
f ( 5 ) = 5 * 5 - 7 = 25 - 7 = 18
- 5 is in the domain
g ( 5 ) = √ ( 5 - 2 ) = √ ( - 3 ) ( this is an irrational number )
- 5 is not in the domain.

8 0

3 years ago

While traveling at a constant speed in a car, the centrifugal acceleration passengers feel while the car is turning is inversely

kvv77 [185]

A = k/R where A = acceleration and R = radius of the turn and k is a constant to be found.

Substituting the given values:-

10 = k / 70

k = 10*70 = 700

So the equation of the motion is A = 700 / R

When the radius is 140 the acceleration is 700 / 140 = 5 ft/sec/sec ( answer)

4 0

3 years ago