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krek1111 [17]
2 years ago
12

Evaluate the expression when x=1/2 and y=-5 -2xy

Mathematics
2 answers:
Ainat [17]2 years ago
5 0

Answer: Y=-5/2

Step-by-step explanation:

Komok [63]2 years ago
4 0

Answer:

5

Step-by-step explanation:

=-2 times 1/2 times -5

=-1 times -5 (negative times negative equals positive)

=5

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Supriya invested $14,320 in a highly rated ETF. At the end of four years, she had $18,434. What was her annual effective yield o
adoni [48]

Answer:

6.517%

Step-by-step explanation:

This is a multi-year investment and we are not working with a $1 initial investment. There is no mention of compounding so we will use formula A=P0⋅(1+r)N with A=$18,434 and P0=$14,320. We do not know the value of r. However, N=4 years. Substituting the values we have $18,434=$14,320⋅(1+r)4. Divide both sides of the equation by $14,320. Next, take the fourth root of both sides of the equation and subtract 1 to find the decimal form of r.

$18,4341.287291.065170.06517=$14,320⋅(1+r)4=(1+r)4=1+r=r

Finally, convert r to a percent.

r=0.06517×100%=6.517%

6 0
3 years ago
7 times as much as the sum of 1/3 and 4/5​
Anika [276]
The correct answer should 1.1333
5 0
2 years ago
Read 2 more answers
Do the question in the picture and then tell how you got your answer
liraira [26]
2(2\sqrt4)^{-2}=\\
2\cdot(2\cdot2)^{-2}=\\
2\cdot(2^2)^{-2}=\\
2\cdot2^{-4}=\\
2^{-3}=\\
\frac{1}{8}

7 0
3 years ago
What are the coordinates of B
Kitty [74]

The coordinates of B are (14, -10).

<h3>How to find mid point?</h3>

The midpoint is already know . we can use it to find the coordinates of B.

Therefore,

(xₙ, yₙ) = (x₁ + x₂ / 2, y₁ + y₂ / 2)

Hence,

M(5, - 4) and A(-4, 2)

The coordinates of B are as follows:

(5, - 4)  = (-4 + x₂ / 2 , 2 + y₂ / 2)

5 = -4 + x₂ / 2

10 = -4 + x₂

x₂ = 14

hence,

-4 = 2 + y₂ / 2

-8  = 2 + y₂

y₂ = - 10

Therefore, the coordinates of B are (14, -10)

Learn more about midpoint here: brainly.com/question/25377004

#SPJ1

7 0
1 year ago
18.
nikitadnepr [17]

Answer:

B

Step-by-step explanation:

\sin{x}=\frac{5}{13}, \cos{x}=\sqrt{1-(\frac{5}{13})^2}=\frac{12}{13}

\sin{y}=\frac{8}{17}, \cos{y}=\sqrt{1-(\frac{8}{17})^2}=\frac{15}{17}

\cos(x+y)=\cos{x}\cos{y}-\sin{x}\sin{y}\\=\frac{12}{13}\times\frac{15}{17}-\frac{5}{13}\times\frac{8}{17}\\=\frac{140}{221}

3 0
1 year ago
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