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Lynna [10]
3 years ago
7

Use the distributive property to write an expression that is equivalent to the expression below. 8(-x-1/2)

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
7 0

Answer:

I think is -8x-4 let me know if im right

Step-by-step explanation:

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The employees of a firm that manufactures insulation are being tested for indications of asbestos in their lungs. The firm is re
diamong [38]

Answer:

0.070

Step-by-step explanation:

Y = number on trial

Y has a negative binomial distribution

r = 3

P = 30% = 0.3 probability of positive indication.

P(Y = 11) probability of 11 employees that must be tested to get 3 positives

Y-1Cr-1*p^r*q^(y-r)

Y-1 = 11-1 = 10

r-1 = 3 -1 = 2

10C2 x 0.3³x0.7⁸

45x0.027x0.05764801

= 0.070

This is the probability that 11 employees must be tested to get 3 positives.

8 0
3 years ago
Alright last question this time 30 points gooo
jenyasd209 [6]

Answer:10

Step-by-step explanation:

2+3+2+3

is

10

6 0
3 years ago
Difference between ellipse circle parabola and hyperbola equations
belka [17]
The equation of a circle is:

(x - h)² + (y - k)² = r²

The equation of a parabola is:

(x - h)² = 4p(y - k)

The equation of an ellipse is: 

\frac{(x-h) ^{2} }{ a^{2} }  +  \frac{(y-k) ^{2} }{ b^{2} }  = 1

where variables a and b and the two different measurements of the vertices

The equation of a hyperbola is: 

\frac{((x-h)^{2} }{ a^{2} } -  \frac{(y-k)^{2} }{ b^{2} }  = 1 if it is with a horizontal transverse axis

\frac{ (y-k)^{2} }{ b^{2} } -  \frac{ (x-h)^{2} }{ a^{2} }  = 1 if it is with a vertical transverse axis

Notice these have a subtraction operation, the exact opposite ellipse. 


6 0
3 years ago
Find the common ratio geometric sequence please
Rudiy27
Recall that in a geometric sequence, you multiply the "current" one by the common ratio to get the "next" so, if you divide "next"/"current", the quotient is just the common ratio,

\bf \cfrac{27}{243}=\cfrac{3}{27}=\cfrac{\frac{1}{3}}{3}=\cfrac{\frac{1}{27}}{\frac{1}{3}}\implies \cfrac{1}{9}\impliedby \textit{common ratio}

notice, all we did was, divide the value, by the number to its left-hand-side.
5 0
3 years ago
The perimeter of the
DaniilM [7]

Answer:

5

Step-by-step explanation:

area of rectangle = l(ength)×w(idth)

perimeter = 2×l + 2×w

diagonal = sqrt(l² + w²) (Pythagoras)

l×w = 12. => l = 12/w

2×l + 2×w = 14

2×12/w + 2×w =14

12/w + w = 7

12 + w² = 7w

w² - 7w + 12 = 0

=> (after a little thinking and trying : what 2 numbers multiply to 12 and add to -7 ? -3 and -4

=> (w-3)×(w-4) = 0

so, we get 2 solutions for w : 3 and 4

that gives us 2 solutions for l : 4 and 3

so, one is 3 and the other 4. it does not matter which is which. length 4 and width 3 produce the same diagonal as length 3 and width 4.

diagonal = sqrt(l² + w²) = sqrt(16 +9) = sqrt(25) = 5

6 0
3 years ago
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