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3 years ago

Which of the following represents "eight more than twice a number is fifty"?

Mathematics

2 answers:

nexus9112 [7]3 years ago

7 0

Your answer is b because 8 more(+) than 2 a number(n) is(=) 50

Montano1993 [528]3 years ago

5 0

Answer:

Option b is right.

Step-by-step explanation:

Given that 8 more than twice a number is fifty

We have to create an algebraic expression for this.

SInce we do not know the number let us assume the number to be N.

Twice the number = 2 times N

= 2N

Now 8 more means we have to add 8 to the value

i.e. 2N+8

This equals 50 is given

Hence 2N+8 =50

Option b is correct.

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Answer:

Probability that a set of tires wears out before 20,000 miles is 0.1151.

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We are given that a tire manufacturer warranties its tires to last at least 20,000 miles or "you get a new set of tires." In its past experience, a set of these tires last on average 26,000 miles with S.D. 5,000 miles. Assume that the wear is normally distributed.

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So, X ~ N( $\mu=26,000,\sigma^{2}=5,000^{2}$ )

Now, the z score probability distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

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P(X < 20,000) = P( $\frac{X-\mu}{\sigma}$ < $\frac{20,000-26,000}{5,000}$ ) = P(Z < -1.2) = 1 - P(Z $\leq$ 1.2)

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3 years ago

Find parametric equations for the tangent line at the point (cos(3pi/6),sin(3pi/6), (3pi/6))

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