Answer:
x = -2
, y = 3
Step-by-step explanation:
Solve the following system:
{4 x + 5 y = 7
y = 3 x + 9
Hint: | Perform a substitution.
Substitute y = 3 x + 9 into the first equation:
{4 x + 5 (3 x + 9) = 7
y = 3 x + 9
Hint: | Expand the left hand side of the equation 4 x + 5 (3 x + 9) = 7.
4 x + 5 (3 x + 9) = (15 x + 45) + 4 x = 19 x + 45:
{19 x + 45 = 7
y = 3 x + 9
Hint: | Choose an equation and a variable to solve for.
In the first equation, look to solve for x:
{19 x + 45 = 7
y = 3 x + 9
Hint: | Isolate terms with x to the left hand side.
Subtract 45 from both sides:
{19 x = -38
y = 3 x + 9
Hint: | Solve for x.
Divide both sides by 19:
{x = -2
y = 3 x + 9
Hint: | Perform a back substitution.
Substitute x = -2 into the second equation:
Answer: {x = -2
, y = 3
Answer:
0.1325
Step-by-step explanation:
Weight of the first stock (w1) = .25
Weight of the second stock (w2) = .75
Expected return for the first stock (E(R1)) = .08
Expected return for the second stock (E(R2)) = .15
The expected return of the portfolio is given by the weighted average of the expected return of each stock:
The portfolio expected return, E(Rp), is 0.1325
Letter H has both point and a line symmetry.
Step-by-step explanation:
This question was requiring you to examine letters of alphabet and determine the ones with point symmetry, line symmetry or both. In this example letter H both point and line symmetry.
Other letters with both point and line symmetry are X, and I
Letters that have point symmetry are; N,S and Z
Learn More
Line of symmetry : brainly.com/question/12527764
Keyword :Line of symmetry
#LearnwithBrainly
Answer:
s = 14m + 458
Step-by-step explanation:
current amount = 458
14 per month
s = 14m + 458
Answer:
Side length of square (inches): 1 ,2, 4, 7
Perimeter of square (inches). : 4, 8, 16, 28
Step-by-step explanation:
Ratio is 1:4 (S:P).
So:
#:8, #=2. This is because 2/8 and 1/4 both = 0.25.
#:16, #=4. 4/16=0.25
7:#, #=28. 4x7=28, 7/28=0.25
Hope that helps
