7. A family has five children, 2 girls and 3 boys. They put their names in a hat, and randomly draw a name to decide who will do the supper dishes. They do this three days in a row. If a name is chosen it is never put
back into a hat, so there is no risk of doing the dishing more than one time!
a. Constructing a tree diagram to calculate the following probabilities:
3 mar
b. all three chosen are boys.
1 I ma
c. at least two chosen are boys.
1 me
d. the second day a girl is chosen.
1 m

henry ordered 5 large pizzas

step-by-step explanation:

sorry no step by step

answer: 0.1,0.85

step-by-step explanation:

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours

a

step-by-step explanation:

given the 2 equations

- x + y = - 2 → (1)

2x - 3y = 4 → (2)

multiplying (1) by 2 and adding to (2) will eliminate the x- term

- 2x + 2y = - 4 → (3)

add (2) and (3) term by term

(2x - 2x) + (- 3y + 2y) = (4 - 4), simplifying gives

- y = 0 ⇒ y = 0

substitute y = 0 in either of the 2 equations for corresponding value of x

substituting in (2) gives

2x = 4 ( divide both sides by 2 )

x = 2

solution is (2, 0 ) → a