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3 years ago

Please help me on this

Mathematics

1 answer:

REY [17]3 years ago

8 0

Answer:

21/100

Step-by-step explanation:

0.21 is out of 100 so you divide 0.21 by 100 which will give you 21 and so it is 21 out of 100.

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Kendrick Campbell purchased a $25,000 municipal bond at a quoted price of 93.456 the bond pays annual interest at a rate of 3.7%

Anastasy [175]

The interest is $925.

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4 years ago

A man has n keys on a key ring, one of which opens the door to his apartment. Having celebrated a bit too much one evening, he r

schepotkina [342]

Answer:

The value is $P(3) = \frac{1}{n}$

Step-by-step explanation:

From the question we are told that

The number of keys is n

The number of keys remaining after the first key is chosen is n-1

The probability that he gains entrance with the first key he selects is $\frac{1}{n}$

Generally the probability that the first key does not open the door is

$p(F_1) = 1 - \frac{1}{n} = \frac{n-1}{n}$

Generally the number of keys remaining after the second key is chosen is

n-2

Generally the probability that he gains entrance with the second key he selects is

$\frac{1}{n-1}$

Generally the probability that the second key does not opens the door is

$P(F_2) = 1- \frac{1}{n-1} = \frac{n-2}{n-1}$

Generally the probability that he gains entrance with the third key he selects is

$\frac{1}{n-2}$

Generally the probability that the door opens with the third key

$P(3) = p(F_1) * P(F_2) * \frac{1}{n-2}$

=> $P(3) = \frac{n-1}{n} * \frac{n-2}{n-1} * \frac{n-2}{n-1}$

=> $P(3) = \frac{1}{n}$

Note :

All the outcome of the events are independent

7 0

4 years ago

Luke brought 4 tires for his race car each of the 2 tires cost $12.40 more than each back tire if all 4 tires cost $100 how much

Studentka2010 [4]

If each tire in the front of the car cost $12.40 more than the rear tires, then the total would be $24.80. And because we say that each tire for Luke's race tire is going to cost him $100 each, he would be paying $224.80 for the two front tires, while including both the cost of each tire and the additional 12.40.

Equation: 12.40(2) + 100(2) = 224.80

8 0

3 years ago

Which equation is y = –3x2 – 12x – 2 rewritten in vertex form? y = –3(x 2)2 10 y = –3(x – 2)2 10 y = –3(x 2)2 – 14 y = –3(x – 2)

Whitepunk [10]

Considering the definition of vertex, the vertex form of y = –3x² – 12x – 2 is y=a(x+2)²+10 , where (-2,10) is the vertex of the parabola.

<h3>Vertex form</h3>

The function f(x) = ax² + bx + c

with a, b, c real numbers and a ≠ 0, is a function quadratic expressed in its polynomial form (It is so called because the function is expressed by a polynomial).

The quadratic function can be expressed by the vertex form of a quadratic equation: y=a(x−h)²+k , where (h,k)= vertex of the parabola.

The formula to find the value x of the vertex of a quadratic equation is $x=\frac{-b}{2a}$