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2 years ago

Helpppppopoppoppppppppp

Mathematics

1 answer:

notka56 [123]2 years ago

6 0

Answer:

0.19

Step-by-step explanation:

i am not so sure but it's my opinion

8[14-(7+4×4)]

__________

1-121-1-8

8[14-[44]

_______

-120-1-8

8[-30]

_____

119-8

8-30

____

111

-22

___

111

✓ 0.19

don't blame me if it is wrong lol

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Subtract the following complex numbers: (4+4i)-(13+17i) ??

Lady bird [3.3K]

Before combining the real parts and the imaginary parts, line them up vertically as follows:

4 + 4i

-13 - 17i

-------------- Now add up each column.

-9 - 13i (Answer A)

6 0

2 years ago

Read 2 more answers

Can someone help me with this 2x+4y+3z=6 x-2y+z=-5 -x-3y-2z=-7 solve for x,y,z

Flauer [41]

Answer:

x = -7 2/3, y = 1 1/3 and z = 5 1/3.

Step-by-step explanation:

2x+4y+3z=6 ..... 1

x-2y+z=-5 ...... 2

-x-3y-2z=-7 .......3

Add equations 2 and 3 to eliminate x:

-5y - z = -12 .....4

Multiply equation 2 by - 2:

-2x + 4y - 2z = 10

Add this to equation 1:

8y + z = 16 ........ 5

Now add equation 4 to equation 5:

3y = 4

y = 4/3 = 1 1/3.

Now find z by substituting for y in equation 4:

-5(4/3) - z = -12

z = 12 - 20/3

z = 36/3 - 20/3 = 16/3 = 5 1/3.

Finally, we find x by substituting for y and z in equation 1:

2x + 4*4/3 + 3*16/3 = 6

2x = 6 - 16/3 - 16

2x = 18/3 - 16/3 - 48/3 = -46/3

x = 23/3 = 7 2/3.

3 0

3 years ago

What is the slope of the line represented by the equation 10×+5y=4 a.2 b.1/2 c.-1/2 d.-2

VikaD [51]

Equation: 10x + 5y = 4
5y = -10x + 4

Divide the equation by 5,
y = -2x + 4/5

Now Compare it with, y = mx + c
Here,m = -2

In short, Your Answer would be Option D

Hope this helps!

6 0

3 years ago

9 students volunteer for a committee. How many different 7-person committees can be chosen?

bixtya [17]

If order doesn't matter then the number of possible choices is:

5 0

2 years ago

(will give brainliest!)

Flura [38]

Answer:

D) cot(C) = 1/2.

Step-by-step explanation:

We can go through each choice and examine is validity.

Choice A)

We have:

$\displaystyle \sec B=\frac{3}{7}$

Recall that secant is the ratio of the hypotenuse to the adjacent.

With respect to B, the adjacent is 6 and the hypotenuse is 7.

Therefore, sec(B) should be 7/6 instead.

A is incorrect.

Choice B)

We have:

$\displaystyle \cot B=\frac{3}{2}$

Cotangent is the ratio of the adjacent side to the opposite.

With respect to B, the adjacent side is 6 and the opposite side is 3.

Therefore, cot(B) = 6/3 = 2.

B is incorrect.

Choice C)

C is incorrect for the reasons listed in A.

Choice D)

We have:

$\displaystyle \cot C=\frac{1}{2}$

Again, cotangent is the ratio of the adjacent side to the opposite.

With respect to C, the adjacent side is 3 and the opposite side is 6.

So, cot(C) = 3/6 = 1/2.

Therefore, D is the correct choice!

8 0

2 years ago