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riadik2000 [5.3K]
3 years ago
7

The value of a term is 2 more than 7 times its term number! What is the answer? Please explain

Mathematics
2 answers:
Sindrei [870]3 years ago
6 0

Step-by-step explanation: iiiiii suck. 11111111111111111111111111111111111111111111111111111111111111111111111

Irina-Kira [14]3 years ago
3 0

Answer:

-1/3

Step-by-step explanation:

Let the number be x.

x = 7x + 2

Add -7x on both sides.

x - 7x = 2

-6x = 2

Divide both sides by -6.

x = 2/-6

x = -1/3

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which of the following explains how triangle BEI could be proven similar to triangle CEH using the AA similarity postulate?
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∠BEI ≅ ∠CEH because vertical angles are congruent; rotate ΔCEH 180° around point E, then translate point C to point B to confirm∠IBE ≅ HCE.

i got it right on the test

Step-by-step explanation:

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In ΔBCD, the measure of ∠D=90°, DC = 3, BD = 4, and CB = 5. What is the value of the tangent of ∠B to the nearest hundredth?
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3 years ago
A multiple choice exam has ten questions. Each question has five possible answers, of which one is correct. Suppose that a stude
Ber [7]

Answer:

8.81% probability that the student answers exactly 4 questions correctly

Step-by-step explanation:

For each question, there are only two possible outcomes. Either he answers it correctly, or he does not. The probability of answering a question correctly is independent of other questions. 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.

A multiple choice exam has ten questions.

This means that n = 10

The probability of answering any question correctly is 0.20.

This means that p = 0.2

What is the probability that the student answers exactly 4 questions correctly

This is P(X = 4).

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

P(X = 4) = C_{10,4}.(0.2)^{4}.(0.8)^{6} = 0.0881

8.81% probability that the student answers exactly 4 questions correctly

4 0
4 years ago
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