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Semmy [17]
3 years ago
11

If i = V-1, then (3 – i)(3+ i) =

Mathematics
1 answer:
castortr0y [4]3 years ago
4 0
9-i^2
9-v^+2v-1
-v^2 +2v +8
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Need Help!! Would greatly appreciate any help.
Allushta [10]

Answer:

draw the points, and then make the x negative if it is reflection over the X axis, y negative if it is aver the y axis, and both if it is a 180 rotation.

for the reflection over y=x, I don't know an easier method so just count the number of units to the line(don't use pythagorean theorem, just go along the lines of the graph, and repeat on the other side.

Step-by-step explanation:

sorry I couldn't draw it myself

4 0
3 years ago
Hey I’ll mark has brainliest and give u 15 pts if u can help me with this :)
Umnica [9.8K]

Answer:

It's C

Explanation: I don't need to give you an explanation >:(

4 0
4 years ago
The problem is in the image, please help. Thanks
andrew11 [14]

Answer:

65

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
I need help with #66 and #68
NeX [460]

Step-by-step explanation:

66. Δy = -3.4 Δx

Δy/Δx = -3.4

The slope of the line is -3.4. Slope-intercept equation of the line is:

y = -3.4x + b

Plug in the given point to find b:

2 = -3.4(4) + b

b = 15.6

Therefore, the equation is y = -3.4x + 15.6.

Use the equation to find the y coordinates.

\left[\begin{array}{cc}x&y\\-4&29.2\\4&2\\6&-4.8\\18&-45.6\end{array}\right]

68. Repeat the same steps as 66.

Δy = -1.7 Δx

Δy/Δx = -1.7

The slope of the line is -1.7. Slope-intercept equation of the line is:

y = -1.7x + b

Plug in the given point to find b:

3 = -1.7(-7) + b

b = -8.9

Therefore, the equation is y = -1.7x − 8.9.

Use the equation to find the x or y coordinates.

\left[\begin{array}{cc}x&y\\-19&23.4\\-7&3\\-2.412&-4.8\\3.2&-14.34\\9.1&-24.37\end{array}\right]

4 0
3 years ago
One number is 7 more than another number. the sum of the numbers is 63. what are the numbers?
worty [1.4K]
Let the smaller number be x
x+x+7=63
2x+7=63
2x=56
x=28

28+7=35

The two numbers are 28 and 35
6 0
3 years ago
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