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3 years ago

1) (10x2 + 24x – 20) = (x+3) Long division

Mathematics

2 answers:

svp [43]3 years ago

5 0

Answer:

x= 3/23

Step-by-step explanation:

10×2+24x-20=x+3

multiply the numbers

20+24-20=x+3

eleminate the opposites

24x=x+3

move the variable to the left

24x-x=3

collect like terms

23x=3

devide both side by 23

x=3/23

tried my best to explain, have a great day or night!

likoan [24]3 years ago

4 0

44x-20=x+3
44x-x-20=3
43x=23
43x=3+20
x=23/43

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The average speed of greyhound dogs is about 18.4 meters per second. A particular greyhound breeder claims that her dogs are fas

irinina [24]

Answer:

The calculated value Z = 1.183 < 1.96 at 0.05 level of significance

Null hypothesis is accepted

A particular greyhound breeder claims that her dogs are faster than the average greyhound

Step-by-step explanation:

Step(i):-

Given the average speed of greyhound dogs is about 18.4 meters per second.

Size of the sample 'n' = 35

mean of the sample x⁻ = 18.7

Population standard deviation = 1.5m/s

level of significance (∝) = 0.05

Step(ii):-

Null hypothesis : H₀ : μ = 18.4

Alternative hypothesis H₁ : μ ≠ 18.4

Test statistic

$Z = \frac{x^{-} - mean}{\frac{S.D}{\sqrt{n} } }$

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Conclusion:-

The calculated value Z = 1.183 < 1.96 at 0.05 level of significance

Null hypothesis is accepted

A particular greyhound breeder claims that her dogs are faster than the average greyhound

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3 years ago

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zhuklara [117]

we know that

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that means

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part b)

We know that

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3 years ago

Fill in the blanks: V=___W=___x=___y=___z=___

Vesna [10]

9514 1404 393

Answer:

v = 39; w = 47; x = 94; y = 39; z = 47

Step-by-step explanation:

The figure shows v° and 51° are complementary, as are z° and 43°.

v° = 90° -51° = 39°

z° = 90° -43° = 47°

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