Two number that are equivalent to 0.20 and 0.30

Cx =d+r solve for x .! pls explain

elena-14-01-66 [18.8K]

Answer: $x=\frac{d+r}{c}$

Step-by-step explanation:

Simply divide by c to isolate x.

$\frac{cx}{c}=\frac{d+r}{c}$

$x=\frac{d+r}{c}$

5 0

4 years ago

Philosophy is not considered science because it lacks

olga_2 [115]

I think it lacks logical......................

5 0

4 years ago

Determine if the expression 9y5 – 10y3 is a polynomial or not. If it is a polynomial,

Stolb23 [73]

I am going to assume that the equation was supposed to be $9y^{5}$ $-10y^{3}$

Answer:

It is a polynomial. It is a binomial and it has a degree of 5.

Step-by-step explanation:

A polynomial is an expression consisting of variables and coefficients, that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponentiation of variables so $9y^{5}$ $-10y^{3}$ will be considered a polynomial.

A binomial is a polynomial with 2 terms.

The degree of a polynomial is the highest exponent in it which in this equation is 5.

8 0

3 years ago

Must the prime factors of a composite number be less than the square root of the composite number?

Colt1911 [192]

Answer:

Step-by-step explanation:

Yes!

The square root of a number represents the "middle number" possible as a divisor of any given number.

All other factors will have one number above the square root and one number below the square root.

For example consider 80.

The prime factors are 2 * 2 * 2 * 2 * 5. The square root of 80 is about 9, so any factor of 80 must have all the primes under the square root or 1 above and 1 below.

10 * 8 is one such pair. 10 is above 9 and 8 is below it.

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I have read the comments made by others. I believe what they are saying is true, but I'm not interpreting the question the same way. I'm looking at these as pairs. The commenter is taking 1 prime at a time. It's a fair way to look at the question. You have to decide how you want to present your answer. You could go either way. That's the problem with some of these questions.

3 0

3 years ago

A company manufactures a wash-down motor that is used in the food processing industry. The motor is marketed with a warranty tha

scZoUnD [109]

Answer:

a) P [ X ≤ 12000 ] = 0.0262 or 2.62 %

b) P [ X > 16100] = 0,0228 or 2,28 %

X = 13479,2 hours or 13500 hours

Step-by-step explanation:

Normal Distribution

μ₀ = 14000 hours and σ = 1050 hours

a) Probability of X (replacement of motor free of charge)

Z = ( X - μ₀ ) / σ

Z = ( 12000- 14000) / 1050

Z = - 2000/1050

Z = - 1,904

From z Table we get

for z = -1.904 P [ X ≤ 12000 ] = 0.0262

P [ X ≤ 12000 ] = 0.0262 or 2.62 %

b) What % of motors can be expected to operate more than 16100 hours

z = ( 16100 - 14000) / 1050

z = 2100/1050 ⇒ 2

From z table we find with z = 2 total number f motor operating up to 16100 hours

From z table we find 0,9772

Then probability of motors operating for more than 16100 hours is:

P [ X > 16100] = 1 - 0.9772 = 0,0228

Then

P [ X > 16100] = 0,0228 or 2,28 %

c) The average hours of operation before failures if only 1% of motors would be replaced free of charge is:

1% = 0,01 Probability then z score is z = 0,4960

0,4960 = ( 14000 - X ) / 1050

0,4960 * 1050 = ( 14000 - X )

520,8 - 14000 = - X

X = 13479,2 hours as is not common such offer company could set up guarantee for 13500 h

7 0

4 years ago