3 years ago

What is the area of this figure? :)

1 answer:

8 0

There are 4 semicircles, each radius is 8cm, so we get the total areas of these semicircles: 4×0.5× $8^{2}$ π
and the square area: 16²
so the total area of figure: 16²+4×0.5× $8^{2}$ π=256+128π

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What are the answers to 2 and 4

Pavel [41]

2. y = -4x + 1 so slope m = -4

passing thru (3,-1)
y = mx + b
-1 = -4(3) + b
-1 = -12 + b
11 = b or b = 11

answer:
equation: y = -4x + 11

4.
answer is a. -2, 1/2 opposite reciprocal

b. 1/4 , 4 ..... only reciprocal
c. 5, -5..........only opposite

3 0

3 years ago

Match each description when z = 9 + 3i. 1. Real part of z 2. Imaginary part of z 3. Complex conjugate of z 4. 3i - z 5. z - 9 6.

sergey [27]

$1)\quad \Re(9+3i)=9\qquad\text{F}\\\\
2)\quad \Im(9+3i)=3\qquad\text{E}\\\\
3)\quad \overline{(9+3i)}=9-3i\qquad\text{D}\\\\
4)\quad 3i-(9+3i)=3i-9-3i=-9\qquad\text{A}\\\\
5)\quad 9+3i-9=3i\qquad\text{B}\\\\
6)\quad 9-(9+3i)=9-9-3i=-3i\qquad\text{C}\\\\$