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3 years ago

Someone help me out please I can’t figure out this question

Mathematics

2 answers:

GaryK [48]3 years ago

5 0

Answer:

She should have added 3, not subtracted 3, to both sides

Step-by-step explanation:

this problem calls for the inverse of operations

$x-3=7\\\\\\3+x-3=7+3\\\\x=10$

Delvig [45]3 years ago

5 0

Answer:

She should have added 3, not subtracted, to both sides

Step-by-step explanation:

You're trying to get X by itself and to do that you need to add 3 to cancel out the -3.

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An experiment consists of rolling two fair number cubes. What is the probability that the sum of the two numbers will be >3

liraira [26]

Answer: $\bold{\dfrac{5}{12}}$

<u>Step-by-step explanation:</u>

greater than 3 means the sum is either 4, 5, or 6.

There are 15 permutations that meet the criteria:

(1, 3), (1, 4), (1, 5), (1,6)

(2, 2), (2, 3), (2, 4), (2, 5), (2,6)

(3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3,6)

(4, 1), (4, 2), (4, 3), (4, 4), (4, 5), (4,6)

(5, 1), (5, 2), (5, 3), (5, 4), (5, 5), (5,6)

(6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6,6)

There are 6²= 36 total permutations for 2 dice.

$Probability=\dfrac{\#\ of\ permutations> 3}{total\ \#\ of\ permutations}\\\\.\qquad \qquad =\dfrac{15}{36}\\\\.\qquad \qquad =\dfrac{5}{12}\\\\$

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Effectus [21]

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Step-by-step explanation:

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