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2 years ago

FAST PLSSSSS

Mathematics

2 answers:

hodyreva [135]2 years ago

6 0

Answer:

factor:

x^2+2x+2x+4

x(x+2)+2(x+2)

(x+2)(x+2)

100x^2+20x+1

100x^2+10x+(10x+1)

10(10x+1)+(10x+1)

(10x+1)(10x+1)=(x+2)(x+2)

Hope this helps you

melomori [17]2 years ago

4 0

Answer:

1/9, (-3)/11

Step-by-step explanation:

Both the left and right side are perfect squares,

(x + 2)^2 = (10x + 1)^2

In order for the squares to be equal, we must have the inner expressions equal to each other or negations of each other:

(x + 2) = $\pm$ (10x + 1)

x + 2 = -10x - 1

Simplifying the first equation gives 9x = 1 so 1/9 and simplifying the second equation gives 11x = -3, so (-3)/11

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2 years ago

Read 2 more answers

-(6)^-1 a.6 b.1/6 c.-1/6 d.-6 No idea what I'm doing...

Monica [59]

$-(6)^{-1} = ?$
Representing in fraction for the best understanding
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When the exponent is negative, the inversion is made, the numerator becomes the denominator, and the denominator becomes the numerator, and the change of signal from the exponent, which was negative, becomes positive.

 $-( \frac{1}{6} )^1 =$
$\boxed{\boxed{- \frac{1}{6}}}\end{array}}\qquad\quad\checkmark$

Answer:
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7 0

2 years ago

Assume that a sample is used to estimate a population proportion μ . Find the margin of error M.E. that corresponds to a sample

hichkok12 [17]

Answer:

$MoE = 1.645\cdot \frac{13.1}{\sqrt{772} } \\\\MoE = 1.645\cdot 0.47147\\\\MoE = 0.776\\\\$

Step-by-step explanation:

Since the sample size is quite large, we can use the z-distribution.

The margin of error is given by

$MoE = z_{\alpha/2}(\frac{s}{\sqrt{n} } )$

Where n is the sample size, s is the sample standard deviation and $z_{\alpha/2}$ is the z-score corresponding to a 90% confidence level.

The z-score corresponding to a 90% confidence level is

Significance level = α = 1 - 0.90= 0.10/2 = 0.05

From the z-table at α = 0.05

z-score = 1.645

$MoE = 1.645\cdot \frac{13.1}{\sqrt{772} } \\\\MoE = 1.645\cdot 0.47147\\\\MoE = 0.776\\\\$

Therefore, the margin of error is 0.776.

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2 years ago

Y = -3x-2 Slope intercept form

lana66690 [7]

Answer:The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept. The y-intercept of this line is the value of y at the point where the line crosses the y axis.

Step-by-step explanation:

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2 years ago

Product A is a 8oz bottle of cough medicine that sells for $1.36. Product B is a 16oz bottle of medicine that costs 3.20 which p

Sauron [17]

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product B= 16oz= 3.20

so Product A has the lower unit price.

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2 years ago