Abox contains4 plain pencils and 4 pens. a second box contains 9 color pencils and 1crayon. one item from each box is chos en at random. what is the probability that a pen from the first box and a crayon from the second box are selected?
write your answer as a fraction in simplest form.

Step-by-step explanation:

1st box: -

No. Of Color pencil = 9

No. Of Pen= 4

Total in box = 8

Prob(pen) = 4/8 = 1/2

2nd box:-

No. Of Plain pencil = 9

No. Of crayon = 1

Total in box = 10

Prob(crayon) = 1/10

Prob(1st pen and 2nd crayon) =

1/2 × 1/10 = 1/20

4sqrt5

step-by-step explanation:

the base has dimensions of 8 x 4, so the diagonal is 64 + 16 square rooted or 4sqrt5.

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold