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3 years ago

Write (3 − 7i) − (-11 + 5i) as a complex number in standard form.

Mathematics

2 answers:

Art [367]3 years ago

8 0

It's A because you flip the signs on both terms in the second set if parentheses and then just add

Katyanochek1 [597]3 years ago

7 0

I believe its 10-6i im pretty sure

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The two dot plots below compare the forearm lengths of two groups of schoolchildren:

Angelina_Jolie [31]

Answer:

Group A, because seven children have a forearm length longer than 10 inches

Step-by-step explanation:

Create the dot plots based on the given information (please see attached images).

Group A = blue dots

Group B = red dots

From inspection of the attached dot plots, we can see that Group A appears to have the longer average forearm length. This is because 7 children have a forearm length of longer than 10 inches.

To calculate the average forearm length, sum all data values and divide by the total number of data values.

$\textsf{Average of Group A}=\dfrac{ 3 \times 10 + 4 \times 11 + 3 \times 12}{10}=11$

$\textsf{Average of Group B}=\dfrac{ 3 \times 9 + 5\times 10+ 2\times 11}{10}=9.9$

Thus proving that Group A has the longer average former length.

7 0

1 year ago

Read 2 more answers

How to find the surface area of rectangular prism

S_A_V [24]

A= 2 WL+ 2 LH+ 2 HW.

W= width
L= length
H= height

7 0

3 years ago

Simplify for a lot of points<br> (1-sin^2x)(1-tan^2x)

notka56 [123]

1/sin^2x-1/tan^2x=
1/sin^2x-1/ (sin^2x/cos^2x)<<sin tan= sin/cos>>
= 1/sin^2x- cos^2x / sin^2x
= (1- cos^2x) / sin^2x <<combining into a single fraction>>
sin^2 x / sin^2x <<since 1- cos^2 x sin^2 x

=1
this simplifies to 1.

6 0

3 years ago

A rectangular filed is 190m by 270m . A rectangular barn is 23 m by 40 m is built in the field .

Anika [276]

Answer: 50,380m

Step-by-step explanation:

190m * 270m = 51,300m

23m * 40m = 920m

Because the barn is in the field, we subtract the barn's area from the field's area, which leaves us with

51,300m - 920m = 50,380m

4 0

3 years ago

What are the length and width of a rectangular traffic sign if the length exceeds the width by 2 inches and the perimeter is 120

Mazyrski [523]

Answer:

L = w+2
L+w = 60
W+2+w = 60
2w+2 = 60
W+1 = 30
W = 29
L = 31

7 0

2 years ago