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Alexxx [7]
3 years ago
7

Factor Quadratics

Mathematics
1 answer:
iVinArrow [24]3 years ago
7 0

Answer:

Step-by-step explanation:

x^2 - 6x - 27

(x - 9)(x+3)

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What is the value of x?<br> a . 75<br> b . 25.5<br> c . 8<br> d . 4.5<br><br> help meeee
Rashid [163]

Answer:

d. 4.5

Step-by-step explanation:

10x-5=16x+22

    -22      -22

10x-27=16x

-10x      -10x

-27=6x

x=4.5

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3 years ago
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What is 3 4/11 as an improper fraction?
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7/18 times 3 in simplest form
IRISSAK [1]

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21/18 which simplifies to <u>7/6</u>

Step-by-step explanation:

5 0
3 years ago
It is assumed that the mean weight of a Labrador retriever is 70 pounds. A breeder claims that the average weight of an adult ma
Sindrei [870]

Answer:

z(s) is in the acceptance region we accept H₀. We don´t have enough evidence to support the breeder´s claim

Step-by-step explanation:

We will test the breeder´s claim at 95% ( CI) or significance level

α = 5 %   α = 0,05    α /2 = 0,025

Sample Information:

sample size   n  = 45

sample mean   x  = 72,5 pounds

Sample standard deviation  s = 16,1

1.-Hypothesis Test:

Null Hypothesis                              H₀        x  =  70

Alternative Hypothesis                  Hₐ        x  ≠  70

Alternative hypothesis contains the information about what kind of test has  to be developed ( in this case it will be a two-tail tets)

2.-z (c) is from z-table     z(c) = 1,96

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z(s)  =  (72,5 -70 ) *√45 / 16,1

z(s)  = 2,5 * 6,71 / 16,1

z(s)  = 1,04

4.-Comparing  z(s) and z(c)

z(s)  <  z(c)

Then z(s) is in the acceptance region we accept H₀. We don´t have enough evidence to support the breeder´s claim

7 0
3 years ago
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