The length of the second side of a triangle is 3cm shorter than the first side and the third side is twice as long as the first side. if the perimeter is 49 how long are the 3 sides

I like to setup a "Let" statement when solving this type of problem.

Let x = first side (since the other sides are defined by it)

x - 3 = second side (since it is 3 cm shorter - take it away - than the first side)

2x = third side (since it is twice - 2 times - the first side)

Then we are given the perimeter which is the sum of all the sides. So we create an equation as follows.

first side + second side + third side = perimeter

x + x - 3 + 2x = 49

Solve the equation: 4x - 3 = 49

4x = 52

x = 13

We've got the first side... use it to find the other sides

First side = 13 cm

Second side = 13 cm - 3 cm = 10 cm

Third side = 2 × 13 cm = 26 cm

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form

false

step-by-step explanation:

the meaning of changing is to edit or make something different.

but transmitting means cause (something) to pass on from one place or person to another.

there 2 different things