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4 years ago

Factoring trinomials: 8)-2x2 + 8x + 10 *

Mathematics

2 answers:

lina2011 [118]4 years ago

8 0

Answer:

-2(x - 5)(x + 1)

Step-by-step explanation:

-2x² + 8x + 10

-2(x² - 4x - 5)

-2(x - 5)(x + 1)

frutty [35]4 years ago

3 0

Step-by-step explanation:

Hey, there!!

Let's do it simply, ok.

Given that,

$= - 2 {x}^{2} + 8x + 10$

Take (-2) common to make it easy.

$= -2( 2 {x}^{2} - 8x - 10)$

= -2{ x^2-(5-1)x -5}

Multily with x,

= -2 {x^2-5x+x-5}

Taking common,

= -2{x(x-5) +1(x-5)

= -2{(x+1)(x-5)}...is your required answer.

Hope it helps...

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3 years ago

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6 0

3 years ago

The manufacturer of an airport baggage scanning machine claims it can handle an average of 560 bags per hour. (a-1) At α = .05 i

ioda

Answer:

The calculated value t = 1.76 < 2.131 at 0.05 level of significance

Null hypothesis is accepted

The manufacturer’s claim is greater than 560 bags per hour

Step-by-step explanation:

Explanation:-

Given sample size 'n' =16

Given the manufacturer of an airport baggage scanning machine claims it can handle an average of 560 bags per hour.

mean of the Population 'μ' = 560

Mean of the sample Χ⁻ = 538

sample standard deviation' S' = 50

Null hypothesis:H₀:μ > 560

Alternative Hypothesis:H₁ : :μ < 560 (left tailed test)

Test statistic

$t = \frac{x^{-}-mean }{\frac{S}{\sqrt{n} } }$

$t = \frac{538-560 }{\frac{50}{\sqrt{16} } } = -1.76$

|t| = |-1.76| = 1.76

Degrees of freedom

γ = n-1 =16-1 =15

$t_{\frac{\alpha }{2} } = t_{\frac{0.05}{2} } =t_{0.025} =2.131$

Conclusion:-

The calculated value t = 1.76 < 2.131 at 0.05 level of significance

Null hypothesis is accepted

The manufacturer’s claim is greater than 560 bags per hour

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4 years ago

20 points!!!! Freya is collecting 50p and £1 coins. When she has 18 coins the value of them is £13.

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Answer:IT IS B srry caps lol it is b bc 50/18

Step-by-step explanation:

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3 years ago

What is the value of 3x to the second power + 4y to the second power if x=2 and y=-3?

Vinvika [58]

Answer: 3(2)^2 + 4(3)^2

Step-by-step explanation:

First do what is replacing the variables by changing X to 2 and Y to -3

3(2)^2 + 4(-3)^2 = 3(4) + 4(9) = 12 + 36 = 48

4 0

3 years ago

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