3 years ago

Easy question!!! 1. Which statement is true?

Mathematics

2 answers:

Pepsi [2]3 years ago

8 0

C. all rectangles are quadrilaterals

coldgirl [10]3 years ago

6 0

Answer:

All quadrilaterals are squares. All rectangles are quadrilaterals.

All quadrilaterals are parallelograms.

Step-by-step explanation:

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The second option, 7 rolls of quarters and 4 rolls of dimes.

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Step-by-step explanation:

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Answer:

D. 14.99d

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d represents the number of DVD's she purchased, and 14.99 was the cost for each DVD. Answer D is multiplying the variable d and the coefficient 14.99. When multiplying variables, there is no need to place a multiplication sign.

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Step-by-step explanation:

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An isotope of iodine has a mass of 134 amu. How many neutrons does the

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Answer:

The correct option is C: the isotope of iodine contains 81 neutrons.

Step-by-step explanation:

The mass (A) of the iodine isotope is given by:

$A = Z + N$

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For iodine Z= 53, so if A = 134 the number of neutrons is:

$N = A - Z = 134 - 53 = 81$

Therefore, the correct option is C. The isotope of iodine contains 81 neutrons.

I hope it helps you!

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