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Morgarella [4.7K]
2 years ago
12

Please help me with this question pls, I really need help

Mathematics
1 answer:
Inessa [10]2 years ago
4 0
Answer: x=7, y=-23
(7,-23)

Explanation:

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I am leaning pre-cal right now and I don't understand it. I did arctan (3/-5) but got it wrong, how do you do this?
Gemiola [76]

9514 1404 393

Answer:

  149.04°

Step-by-step explanation:

You must consider the signs of the components of the vector. The value -5+3i will be in the 2nd quadrant of the complex plane.

When you use the single-argument arctan function, it will tell you the angle is -30.96°, a 4th-quadrant angle. (arctan( ) is only capable of giving you 1st- or 4th-quadrant angles.)

You find the 2nd-quadrant angle by adding 180° to this value:

  -30.96° +180° = 149.04° = arg(-5+3i)

__

The attachments show the calculation using a suitable calculator (1st) and a spreadsheet (2nd). The spreadsheet function ATAN2(x,y) gives the 4-quadrant angle in radians, considering the signs of the two arguments. Here, we converted it to degrees. The calculator can be set to either degrees or radians.

7 0
3 years ago
Help please due today!!
julia-pushkina [17]
In this image, the two angles (equations) form a right angle, which is 90°. You combine these equations: 4y-7+3y-1. When you combine like terms, you get 7y-8. You set this equal to 90°. 7y-8=90. Solve for y, and you get y=12.
8 0
3 years ago
Round these decimals to 2 decimals places.Please I need some help...
Naddik [55]
A) 1.15
B) 2.87
C) 3.59
D) 4.22
E) 5.74
F) 6.95
G) 7.25
H) 8.64
I) 9.68
J) 28.33
8 0
3 years ago
Read 2 more answers
6=x/4-8 for x what equation do you get after adding 8 to each side
Lena [83]

Answer:

After adding 8 you get  14 = x/4.

Step-by-step explanation:

6=x/4-8  Add 8 to both sides:

6 + 8 = x/4 - 8 + 8

14 = x/4

x = 4*14

x = 56.

6 0
3 years ago
Please helpppp!!! Will mark brainlyist
Snowcat [4.5K]

Answer:

x = 35.5

Step-by-step explanation:

cos 65° = 15/x

cos 65° · x = 15

x = 15/cos 65°

x = 35.5

4 0
3 years ago
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