Hey, I'm in honors math, and I need help with this question. Please help as much as you can PLEASE!!!!

Mathematics

1 answer:

Nana76 [90]3 years ago

5 0

Answer:

Step-by-step explanation:

a) Area of shape A= 17 (15z+1)

Area of A = 255z+17

b) Area of shape B

One way to find the solution is to take the area of

bigest rectangle ( z+z+8)*(z+4+6)

and subtract the two small rectangles

(z*(14-10)) and

(6*8)

Area of B= [(2z+8)(z+10)] -4z-48

=2z²+ 20z +8z +80 -4z-48 combine like terms

=2z² +24z +32

c) 225z+17 -2z² -24z -32 =

-2z²+201z -15

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Answer:

The sample standard deviation is 393.99

Step-by-step explanation:

The standard deviation of a sample can be calculated using the following formula:

$s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }$

Where:

$s=$ Sample standart deviation

$N=$ Number of observations in the sample

${\displaystyle \textstyle {\bar {x}}}=$ Mean value of the sample

and $\sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }$ simbolizes the addition of the square of the difference between each observation and the mean value of the sample.