Hh i know how to do this but i need doing so-

Step-by-step explanation

So you need the fraction to equal 2.4 and you don't know the numerator. 5 times 2.4 equals 12 so the numerator has to equal 12 so the answer is c

  x = 4

Step-by-step explanation:

Undo what is done to the variable, in reverse order. The variable is multiplied by 3/5 and 0.5 is subtracted from the result.

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To undo those operations, first you undo the subtraction by adding 0.5 to both sides of the equation. This gives you ...

  3x/5 = 2.4

To undo the multiplication by 3/5, you can multiply by the inverse of that value, 5/3. Multiplying both sides of the equation by 5/3 gives ...

  x = (5/3)(2.4) = 12/3

  x = 4

f(x) = y

f(-3) = -5

step-by-step explanation:

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