1. Mass of ramekin and cover (original) 2. Mass of ramekin and cover (after 1st heating) 3. Mass of ramekin, cover, and hydrated salt 4. Constant mass of ramekin and cover 5. Mass of hydrate (4-3) 6. Mass of ramekin, cover, and anhydrous salt (1st heating) 7. Mass of ramekin, cover, and anhydrous salt (2nd heating) 8. Constant mass of ramekin, cover, and anhydrous salt 9. Mass of anhydrous salt (8-4) 10. Mass of water lost (5-9)

good luck on your studies! : )

david edward.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

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

answer: i literally just answered this question but they want me to do it again

step-by-step explanation: