3 years ago

THIS IS URGENT! add 7-9=7+(-9)

Mathematics

2 answers:

Burka [1]3 years ago

7 0

Answer:

-3=3

<h2><em>Hope this helps!!!</em></h2>

Klio2033 [76]3 years ago

6 0

Answer:

Step-by-step explanation:

You might be interested in

The point StartRoot x EndRoot is plotted on the number line. A number line going from 9 to 10 in increments of 0.1. StartRoot x

borishaifa [10]

87

Take 9.35 = sqrt(x) —> x = 87.4 —> 87

7 0

3 years ago

Read 2 more answers

Jeri has 2/3 yard of fabric to use for making some puppets she needs 1/6 yard for each puppet how many puppets can jeri make wit

AlekseyPX

Answer:4

Step-by-step explanation:

6 0

2 years ago

Stock A ‘s returns have a standard deviation of 0.5, and stock B’s returns have standard deviation of 0.6.The correlation coeffi

galben [10]

Answer:

The variance of the profile is 0.2179.

Step-by-step explanation:

We are given the following in the question:

$\sigma_A = 0.5\\\sigma_B = 0.6\\\rho_{A,B} = 0.5\\w_A = 70\% = 0.7\\w_B = 30\% = 0.3$

Variance of portfolio is given by:

$w_A^2\sigma_A^2 +w_B^2\sigma_B^2 + 2w_Aw_BCov_{A,B}$

$Cov_{A,B} = \rho_{A,B} \times \sigma_A \times \sigma_B \\=0.5\times 0.5 \times 0.6\\=0.15$

Putting values, we get,

$w_A^2\sigma_A^2 +w_B^2\sigma_B^2 + 2w_Aw_BCov_{A,B}\\=(0.7)^2(0.5)^2 + (.3)^2(0.6)^2 + 2(0.7)(0.3)(0.15)\\=0.2179$

Thus, the variance of the profile is 0.2179.

4 0

3 years ago

Express the following vector in the form v=v1i+v2j+v3k. 3u - v if u=(4,7,-3) and v=(2,-7,5).3u - v = ____ i + ____ j + _____ k.(

Alecsey [184]

Answer:

Step-by-step explanation:

Given the vectors u = (4,7,-3) and v=(2,-7,5), both vectors are 3-dimensional in nature and can also be rewritten as;

u = 4i+7j-3k and v = 2i-7j+5k

To get 3u-v, we will substitute the given vectors into the expression;

3u-v = 3(4i+7j-3k) - (2i-7j+5k)

open the parenthesis

3u-v = 12i+21j-9k - 2i + 7j - 5k

collect like terms

3u-v = (12i - 2i) + (21j + 7j) (-9k-5k)

3u - v = 10i+28j-14k

To simplify the answer, we will divide through by 2

3u - v = 10i/2+28j/2-14k/2

<em>Hence the simplified form of the expression is 5i+14j-7k</em>

3 0

3 years ago

A sports club charges an initiation fee and a monthly fee. At the end of 5 months, Christelle had paid a

zimovet [89]

Answer:

INCLUDES ANSWER+ EXPLANATION

hope this helps!!

5 0

2 years ago