3 years ago

I need help on my math!!!!!

Mathematics

1 answer:

Masja [62]3 years ago

5 0

Answer:

The answer to your problem is 2.

Step-by-step explanation:

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2. Multiple Choice. Gary says, “I chose a number. I multiplied it by 5 and then

kkurt [141]

Answer:

The answer would be B

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3 years ago

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Write x^2 + 6x -7 in the form (x+a)^2 +b where a and b are integers please

ANTONII [103]

Answer:

$(x + 3) {}^{2} - 16$

Step-by-step explanation:

${x}^{2} + 6x - 7 = (x + 3) {}^{2} - (3) {}^{2} - 7 \\ = (x + 3) {}^{2} - 16$

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3 years ago

Which is a factor of x2 + 5x – 247 (x-6) (x+6) (X-8) (X + 8)

Travka [436]

Answer:

the factor for x^2 + 5x - 24 is

(x + 8)

Step-by-step explanation:

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3 years ago

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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

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

$Z = \frac{18.7-18.4}{\frac{1.5}{\sqrt{35} } }$

Z = 1.183

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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2 years ago

6) Write an expression that is equivalent to 3(7 + x). 3(7+ x) =___ +___ ?

sergejj [24]

Answer:

21 + 3x

Step-by-step explanation:

hope this helps

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2 years ago