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2 years ago

Which property is used to write the equivalent expressions below? (2x7) x3=2x (7x3)

Mathematics

2 answers:

NemiM [27]2 years ago

8 0

Answer:

Associative Property of Multiplication

Step-by-step explanation:

The Associative Property of Multiplication states that the answer to an equation will stay the same even if the grouping of the numbers changes.

motikmotik2 years ago

7 0

Answer:

Step-by-step explanation:9x5

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Find the value of mn if ab= 9cm, bc= 7.2cm, and LM= 12cm

Alexus [3.1K]

Answer:

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Step-by-step explanation:

Since the shapes are similar, we can write a proportion. Let x be the length of MN.

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3 years ago

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3 years ago

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ABC is a right triangle. If AB = 3 and AC = 7, find BC. Leave your answer in simplest radical form.

aivan3 [116]

1. Suppose that BC is hypotenuse, then by Pythagorean theorem:
$BC^2=AC^2+AB^2, \\ BC^2=3^2+7^2, \\ BC^2=9+49, \\ BC^2=58, \\ BC= \sqrt{58}$ .
2. If BC is not hypotenuse, then BC is a leg and AC is hypotenuse (because AC>AB). Hence by Pythagorean theorem:
$AC^2=AB^2+BC^2, \\ 7^2=3^2+BC^2, \\ BC^2=49-9, \\ BC^2=40, \\ BC= \sqrt{40} =2 \sqrt{x10}$ .

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3 years ago

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