Fill in the blank! __ is 60% of 70

Mathematics

2 answers:

nika2105 [10]4 years ago

6 0

42 is 60% of 70

I hope that's help !

sveta [45]4 years ago

3 0

To calculate percentages you divide it by 100 and multiply it by the 5. So for this example you divide 70 by 100 and then multiply it by 60. Hope this helps, comment with any questions :)

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Norma-Jean [14]

Step-by-step explanation:

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2 years ago

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Ella completed the following work to test the equivalence of two express

murzikaleks [220]

Answer:

The expressions are not equivalent because Ella did not know that you can’t use substitution to test for equivalence.

Step-by-step explanation:

<u>Equivalent algebraic expressions</u> are those expressions which on simplification give the same resulting expression.

Two algebraic expressions are said to be <u>equivalent</u> if their values obtained by substituting any values of the variables are same.

Two expressions 3f+2.6 and 2f+2.6 are not equivalent, because when f=1,

$3f+2.6=3\cdot 1+2.6=3+2.6=5.6\\ \\2f+2.6=2\cdot 1+2.6=2+2.6=4.6\\ \\5.6\neq 4.6$

Method of substitution can only help her to decide the expresssions are not equivalent, but if she wants to prove the expressions are equivalent, she must prove it for all values of f.

$3f+2.6=2f+2.6\\ \\3f=2f\\ \\3f-2f=0\\ \\f=0$