Algebra tiles make solving equations, merging like words, or factoring polynomials a visual operation, similar to students using counters to make sense of addition in elementary school, or students using number lines to make sense of integers.

Step-by-step explanation:

i hope this helped

7 0

3 years ago

(0.3d-1.5)/3 1/3=0.84:7/15

Anika [276]

Answer:

d = 25

Step-by-step explanation:

Perhaps you want to solve for d:

(0.3d -1.5)/(3 1/3) = 0.84/(7/15)

Change the division by a fraction to multiplication by its inverse.

(0.3d -1.5)·(3/10) = (0.84)·(15/7)

0.09d -0.45 = 1.8 . . . . . . . . . . . . simplify

d - 5 = 20 . . . . . . . . . . . . . . . . . . divide by 0.09

d = 25 . . . . . . . . . . . . . . . . . . . . . add 5

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Grouping symbols help show what is being divided by what. Especially where mixed numbers are involved, parentheses help show that the number 3 1/3 is not supposed to be interpreted as the product of 3 and 1/3.

4 0

3 years ago