Isabella's shopping for back to school clothes she bought three skirts, two pairs of jeans, and four sweaters. wight and evaluate an expression to find how much she spent not including sales tax. skirt- 35.99 jeans- 49.99 sweater-32.99

Number of items bought by Isabella:

Number of skirts = Ns = 3

Pairs of jeans = Nj = 2

Number of sweaters = Nsw = 4

Price of a skirt = Ps= 35.99

Price of a pair of jeans = Pj = 49.99

Price of a sweater = Psw = 32.99

Expression to calculate how much Isabella spent = (Ns × Ps) + (Nj × Pj) + (Nsw × Psw)

Evaluating the expression by substituting with respective values:

Total Money Spent by Isabella = (3 × 35.99) + (2 × 49.99) + (4 × 32.99)

⇒ Total Money Spent by Isabella = 107.07 + 99.98 + 131.96

⇒ Total Money Spent by Isabella = 339.01

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".

30005

yes ok