Humans usually have 20 baby teeth, raul said he lost 4/10 of his baby teeth. ana said raul lost 2/5 of his baby teeth. which of these conjectures are true?

Ana and Raul are both correct since 4/10 and 2/5 are equivalent fractions.

Step-by-step explanation:

Fractions are typically written in simpliest form, meaning the numerator and denominator have both been divided by their greatest common factor.  In the case of the baby teeth, we can look at both Raul's fraction and Ana's fraction to see if they represent the same number of teeth overall.  Since there are 20 teeth total, 4/10 of 20 would be 8 teeth since we would multiply both the numerator and denominator by 2.  Also, if we look at Ana's fraction, 2/5 of 20 would also be 8 since we would multiply both the numerator and denomiator by four.  So, both of their conjectures are true.  

no idea

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