The table shows the time 50 students spent on their homework. Frequency
Time (t) in minutes
0 7
30 27
60 12
90 4
Work out an estimate for the mean time the students spent on their homework.
56.4 minutes

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

sure i'm up for it

step-by-step explanation:

the answer is 21%.

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%