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romanna [79]
3 years ago
9

What is the complete factorization of 2x2 − 11x − 21?

Mathematics
1 answer:
vlabodo [156]3 years ago
4 0
It is 2x(x-7)+3(x-7) = (2x+3)(x-7)
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Can u get the steps to solving <br> -2(4)^2+4
svp [43]
(4)^2 must be done first.

That’ll give you 16. (4x4)

16 x -2= -32

-32+4= -28
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3 years ago
Which of the following is the reciprocal parent function?<br><br> (Please help ASAP)
ivolga24 [154]

Answer:

C

Step-by-step explanation:

8 0
3 years ago
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Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $30.00, how much money is angela sav
Musya8 [376]
You have to calculate percent from the original price. Try it and show the results.
7 0
3 years ago
You measure 20 turtles' weights, and find they have a mean weight of 45 ounces. Assume the population standard deviation is 11.5
Naily [24]

Answer: the maximal margin of error associated with a 90% confidence interval for the true population mean turtle weight = 4.23

Step-by-step explanation:

Formula for margin of error : E=\dfrac{z^*\times (Population\ standard\ deviation)}{\sqrt{Sample\ size}}

, where z* = Critical z-value.

Given: population standard deviation = 11.5 ounces

Sample size = 20

Z value for 90% confidence level = 1.645

margin of error (E) = \dfrac{1.645\times11.5}{\sqrt{20}}

\approx4.23

Hence, the maximal margin of error associated with a 90% confidence interval for the true population mean turtle weight = 4.23

3 0
3 years ago
Denzel wants to work out the density of a block of wood the block of wood is in the shape of the cuboid
marishachu [46]

Answer:

Density = 1.094g/cm^3

Step-by-step explanation:

Given

Length = 17.7cm

Width = 8.3cm

Height = 13.0cm

Mass = 2090g

See attachment

Required

Determine the density of the wood

First, we calculate the volume of the wood.

Volume = Length * Width * Height

Substitute values for Length, Width and Height

Volume = 17.7cm * 8.3cm * 13.0cm

Volume = 1909.83cm^3

The density is:

Density = \frac{Mass}{Volume}

Density = \frac{2090g}{1909.83cm^3}

Density = 1.094g/cm^3<em> --- approximated</em>

5 0
3 years ago
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