(a)a private club grew by 7 members each week for 35 weeks. what was the total change in the club's size?

(b)mary owns 7 shares of a certain stock. yesterday the total value of her shares went down by 28 dollars. what was the change in value for each share?

a) 245 members

b) 4 dollars

Step-by-step explanation:

a) If 7 new members were added each week, then after 35 weeks, the number of new members that would have been added =

7 members/week × 35 weeks = 245 members

Therefore the club's size changed (increased) by 245 members.

b) Number of shares owned by Mary from a certain stock = 7 shares

Decrease in the total value of her shares = 28 dollars

If 7 shares decreased by 28 dollars, then 1 share decreased by

28 ÷ 7 = 4 dollars

This means the value of each share changed (decreased) by 4 dollars.

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

3,750 deer

step-by-step explanation:

1,500 is 15 times larger than 100

lets make 250 15 times larger.

3750 deer