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3 years ago

If a=4 and b=5, what is the value of the following expression? 3 (a+3b)-4

Mathematics

2 answers:

gavmur [86]3 years ago

8 0

Answer: The answer is 23

Step-by-step explanation:

Greeley [361]3 years ago

6 0

Answer:

Step-by-step explanation:

Given :

$3(a+3b)-4$

$a=4\\b=5$

To Find : value of the given expression.

Solution :

$3(a+3b)-4$

Putting value of a and b

⇒ $3(4+3*5)-4$

Solving this we will use BODMAS rule : According to this rule we need to follow the sequence for solving mathematical expressions

B - Bracket

O- Of

D - Division

M- Multiplication

A - Addition

S- Subtraction

Following this sequence we will solve the given expression

⇒ $3(4+15)-4$

⇒ $3(19)-4$

⇒ $57-4$

⇒ $53$

Thus, The value of the expression $3(a+3b)-4$ is 53

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In a recent year, 304 of the approximately 300,000,000 people in the United States were struck by lightning. Estimate the prob

umka2103 [35]

Answer:

$\frac{19}{18,750,000}=0.0000010133333333$

Step-by-step explanation:

We have been given that in a recent year, 304 of the approximately 300,000,000 people in the United States were struck by lightning.

$\text{Probability}=\frac{\text{Number of favorable outcomes}}{\text{Number of possible outcomes}}$

$\text{P( A randomly selected person in the United States will be struck by lightning this year)}=\frac{304}{300,000,000}$

$\text{P( A randomly selected person in the United States will be struck by lightning this year)}=\frac{19}{18,750,000}$

$\text{P( A randomly selected person in the United States will be struck by lightning this year)}=0.0000010133333333$

Therefore, the probability that a randomly selected person in the United States will be struck by lightning this year is $\frac{19}{18,750,000}=0.0000010133333333$ .

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