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3 years ago

HELP ME FOR 50 POINTS AND BRAINETEST

Mathematics

1 answer:

stealth61 [152]3 years ago

6 0

so the first one is multiplying as the second one is division

Step-by-step explanation:

in division a higher number has to be divided but it multiplying this rule doesnt really matter and at first you probably weren't paying attention (not saying you were not) and you thought that they were both multiplication which is wrong but if you do the division and multiplication problem they end up with the same answer. Hope this helps :)

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I need help!! I am confused

STALIN [3.7K]

2 plus 2 is 4 minus 1 thats 3 quick maths

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4 years ago

In ΔABC, the measure of ∠C=90°, the measure of ∠A=40°, and BC = 2.6 feet. Find the length of CA to the nearest tenth of a foot.

vladimir1956 [14]

Answer:

3.1

Step-by-step explanation:

8 0

3 years ago

2. A geological study indicates that an exploratory oil well drilled in a particular region should strike oil with probability 0

yKpoI14uk [10]

Answer:

3.07% probability that the third oil strike comes on the fifth well drilled.

Step-by-step explanation:

For each oil drill, there are only two possible outcomes. Either there is a strike, or there is not. The probability that oil is striken in a trial is independent of other trials. 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.

Strike oil with probability 0.20.

This means that $p = 0.2$

Find the probability that the third oil strike comes on the fifth well drilled.

2 strikes on the first four drills(P(X = 2) when n = 4) and strike on the fifth(0.2 probability).

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

$P(X = 2) = C_{4,2}.(0.2)^{2}.(0.8)^{2} = 0.1536$

0.2*0.1536 = 0.0307

3.07% probability that the third oil strike comes on the fifth well drilled.

8 0

3 years ago

Which algebraic expression represents this phrase? the product of 40 and the distance to the finish line A. 40•d B.

kenny6666 [7]

Answer:

A 40•d

Step-by-step explanation:

The product of 40 and the distance (d)

40•d

B is division

C is subtraction

D is addition

The product of two numbers is multiplication, so the answer must be A

5 0

3 years ago

The number of polynomials having zeros as -2 and 5 is a)1 b)2 c)3 d)more than 3

WINSTONCH [101]

Answer:

d) More than 3.

Step-by-step explanation:

The polynomial (x - 5)(x + 2) ( = x^2 - 3x + 10) has zeros of -2 and 5 but so have the polynomials formed by multiplying this by any integer:

- for example 2(x - 5)(x + 2) , 4(x - 5)(x + 2) and so on.

3 0

3 years ago