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2 years ago

The value of 4a( a - 3 ) is :

Mathematics

1 answer:

liubo4ka [24]2 years ago

3 0

Answer:

Its -12 if a is meant to be multiplied

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Dean has a spinner that is divided into 4 equal sections are labeled 1, 2, 3, and 4. Dean spun the spinner 60 times. He recorded

ICE Princess25 [194]

Answer:

Step-by-step explanation:

Dean recorded the results of spinning the spinner 60 times:

Number 1 spun 12 times
Number 2 spun 17 times
Number 3 spun 15 times
Number 4 spun 16 times

The experimental probability is the ratio of the number of times an event occurs to the total number of trials or times the activity is performed.

Find all experimental probabilities:

$P_{1}=\dfrac{12}{60}=\dfrac{1}{5}\\ \\P_{2}=\dfrac{17}{60}\\ \\P_3=\dfrac{15}{60}=\dfrac{1}{4}\\ \\P_4=\dfrac{16}{60}=\dfrac{4}{15}$

Hence, option B is correct

7 0

3 years ago

Ethan correctly answers 80% of the total questions on his history test. Enter the number of questions on Ethan’s history test.

jasenka [17]

It might be about 20 questions

8 0

3 years ago

Read 2 more answers

I need help........please

kari74 [83]

Answer:

B. is the correct answer

5 0

2 years ago

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When developing a plan for a geometric proof, which of the following is not important?

Galina-37 [17]

The answer is B. determining the number of steps needed is not important when developing a plan for a geometric proof.

5 0

2 years ago

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CAN SOMEONE HELP AND EXPLAIN THIS TRIGONOMETRY PROBLEM

Tema [17]

Step-by-step explanation:

Hey there!

Simply work with it.

As it is a Right angled triangle, taking angle 40° as a reference angle. Then,

Length of board = hypotenuse = 15 feet.

To find: height of ladder = perpendicular.

Now,

Taking sin ratio,

$\sin = \frac{p}{h}$

$sin \: 40 = \frac{p}{15}$

or, as in per the given sin value is 0.6428

so,

$0.6428 = \frac{p}{15}$

or, 15 × 0.6428 = p

or, p = height of ladder = 9.642.

Therefore, p = height of ladder = 10 feet. { rounding off we get 10 feet as answer}.

Hope it helps...

3 0

2 years ago