Manuel bought 6 postcards during 3 days of vacation. how many days will manuel have to spend on vacation before he will have bought a total of 20 postcards?

  10 days

Step-by-step explanation:

The problem seems to assume that Manuel will continue to buy postcards at exactly the rate of 2 per day during his whole vacation. 2×10 = 20, so it will take 10 days to accumulate 20 postcards.

If you like proportions, you could write one:

  days/postcards = 3/6 = ??/20

Multiplying by 20 gives ...

  20(3/6) = ?? = 10 . . . . . 10 days on vacation will result in 20 postcards

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

answer: the is put the 450

step-by-step explanation: