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mafiozo [28]
3 years ago
11

Josie walks 3/4 mile in 1/5 hour what is josie speed in miles per hour

Mathematics
1 answer:
Over [174]3 years ago
5 0

Answer: 3\dfrac34\text{ miles per day}

Step-by-step explanation:

We know that the formula to find speed is given by :-

\text{speed}=\dfrac{\text{distance}}{\text{time}}

Given: Distance = \dfrac34 mile

Time = \dfrac15 hour

Speed = \dfrac{\dfrac34}{\dfrac15}\text{ miles per hour}

=\dfrac{3}{4}\times5\text{ miles per hour}\\\\=\dfrac{15}{4}\text{ miles per hour}\\\\=3\dfrac34\text{ miles per day}

hence, speed =3\dfrac34\text{ miles per day}

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There are 20 machines in a factory. 7 of the machines are defective.
adelina 88 [10]

Answer:

0.1225

Step-by-step explanation:

Given

Number of Machines = 20

Defective Machines = 7

Required

Probability that two selected (with replacement) are defective.

The first step is to define an event that a machine will be defective.

Let M represent the selected machine sis defective.

P(M) = 7/20

Provided that the two selected machines are replaced;

The probability is calculated as thus

P(Both) = P(First Defect) * P(Second Defect)

From tge question, we understand that each selection is replaced before another selection is made.

This means that the probability of first selection and the probability of second selection are independent.

And as such;

P(First Defect) = P (Second Defect) = P(M) = 7/20

So;

P(Both) = P(First Defect) * P(Second Defect)

PBoth) = 7/20 * 7/20

P(Both) = 49/400

P(Both) = 0.1225

Hence, the probability that both choices will be defective machines is 0.1225

4 0
3 years ago
How does tan 135 degrees compare to tan -135 degrees
Anna007 [38]
Evaluating the tangent function for the two values we obtain the following:
tan 135=tan(135+180)=tan 315=-1

next:
tan -135=tan(180-135)=tan 45=1
thus comparing the two we see that tan 135 is negative while tan -135 is positive
3 0
3 years ago
Julie assembles shelves for a department store and gets paid $3.25 per shelf. She can assemble 5 per hour and works 8 hours per
Jlenok [28]

Pay per shelf = $3.25

No of shelfs per hour = 5

Total hours per day = 8

Total days to find pay of = 7

= 3.25×5×8×7

= 910

Therefore she is paid $910 after 1 week.

Must click thanks and mark brainliest

5 0
3 years ago
Simplify each expression using order
Ymorist [56]

Answer:

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Which of the following expression(s) are fourth-degree trinomials? Select all that apply.
DaniilM [7]

Answer:

Options A and B are polynomial of the fourth degree

Step-by-step explanation:

In this problem, option

A. 3x2y + 5x3y + 6y4

Is a Polynomial of the fourth degree because of the 6y⁴ term which is the highest degree

Also the option

B. 6y4 + 5x3 + 1 has a 6y⁴ term which indicates that the polynomial is a fourth degree polynomial

What is the degree of a polynomial?

In mathematics, the degree of a polynomial is the highest of the degrees of the polynomial's monomials with non-zero coefficients. The degree of a term is the sum of the exponents of the variables that appear in it, and thus is a non-negative integer

5 0
3 years ago
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