Barbara used the distributive property to write an expression that is equivalent to 7 d + 63. Her work is shown below. The greatest common factor is 7 so 7 d + 63 = 7 (d + 63) What was Barbara's error?

Barbara's did not factor out 63.

Step-by-step explanation:

63 can be factorize as 63 = 7 9 and 7 d can be factorize as 7 d = 7 d

Therefore common term between 7 d and 63 is 7.

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In Barbara's equation, it did not factorize 63 as it contains common term 7 in it. Therefore that is the error in Barbara's equation.

The answer is B

Step-by-step explanation:

i took the test.

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64