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2 years ago

Evaluate 9 - 3 - 2 + 4.

Mathematics

2 answers:

ruslelena [56]2 years ago

5 0

Answer:

Step-by-step explanation:

9 - 3 - 2 = 4

4 + 4 = 8

Hope this help you :)

mark me brainlest pls ;)

IgorLugansk [536]2 years ago

3 0

Answer:

Step-by-step explanation:

9 - 5 = 4

4 + 4 equals 8

hope this helps :D

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What is the answer to 6x5x3=

Otrada [13]

Answer:

Step-by-step explanation:

on multiplication.

6 0

2 years ago

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How was your day?<br> (just answer something random for points)

Korolek [52]

it was fine, thanks for asking. how was your day?

thanks for the points btw :)

4 0

2 years ago

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I got this far in my working out and am already stuck. have i gone wrong?

Kipish [7]

Yes, you made an algebraic error. By multiplying 18 x 4, you messed up on order of operations.

(x+9)(x+2)*4

becomes:

(x^2+11x+18)*4

= 4x^2 + 44x + 72

anyway, this is how I would do this problem:

(x+9)(x+2)(4) = 912

(x+9)(x+2) = 228

x^2 + 11x + 18 = 228

x^2 + 11x - 220 = 0

(x+21)(x-10) = 0

x = -21 or 10

The dimensions can't be negative, so we only use x = 10

The dimensions are then 10+9, 10+2, 4

or 19, 12, 4

6 0

3 years ago

Round it to 1 significant figure

balu736 [363]

Answer:

2 ( one significant figure)

Step-by-step explanation:

798/8 x 41 in order to express it in 1 significant figure

we will multiply the denominator and then divide both the numerator and denominator.

so,

798/328

2.453

now to one significant figure it will be 2

3 0

3 years ago

According to a study done by Otago University, the probability a randomly selected individual will not cover his or her mouth wh

nirvana33 [79]

Answer:

47.52% probability that among 10 randomly observed individuals fewer than 3 do not cover their mouth

Step-by-step explanation:

For each individual, there are only two possible outcomes. Either they cover their mouth when sneezing, or they do not. The probability of an individual covering their mouth when sneezing is independent of other individuals. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

According to a study done by Otago University, the probability a randomly selected individual will not cover his or her mouth when sneezing is 0.267.

This means that $p = 0.267$