Anybody have the answer?

(a) Martina owns 64 shares of a certain stock. Yesterday the value of each share went up by 8

Mekhanik [1.2K]

Answer:

a. 64 x ($)8 = ($)512

b. 45 (members) / 9(weeks) = 5 (members per week)

8 0

3 years ago

Solve the system using the elimination method.

spayn [35]

Answer:

(x, y, z) = (-22/13, 29/13, 6/13)

Step-by-step explanation:

Adding the first and second equations, we get ...

(3x +2y -3z) +(7x -2y +5z) = (-2) +(-14)

10x +2z = -16 . . . . collect terms

5x + z = -8 . . . . . . divide by 2 . . . [eq4]

Adding twice the second equation to the third, we get ...

2(7x -2y +5z) +(2x +4y +z) = 2(-14) +(6)

16x +11z = -22 . . . . . . [eq5]

Now, we have two equations with the variable y eliminated. We can subtract [eq5] from 11 times [eq4] to eliminate z:

11(5x +z) -(16x +11z) = 11(-8) -(-22)

39x = -66

x = -66/39 = -22/13

From [eq4], we can find z as ...

z = -8 -5x = -8 -5(-22/13) = 6/13

And from the second equation, we get ...

y = (1/2)(7x +5z +14) = (1/2)(7(-22/13) +5(6/13) +14) = 29/13

The solution is (x, y, z) = (-22/13, 29/13, 6/13).

6 0

3 years ago

Solve y = x + 6 for X. x= y + 6 x= -y + 6 x = y - 6 x= -y - 6

damaskus [11]

Answer:

x=y-6

Step-by-step explanation:

First, flip the equation.

x+6=y

Finally, add -6 to both sides.

x+6+−6=y+−6

x=y−6

6 0

3 years ago

Read 2 more answers

Need help with this question

dybincka [34]

Download a math calculator or math awnsers

7 0

3 years ago

Read 2 more answers

-1.398 = 2.2 + n/-5.53 Does this look good so far? -1398 = 2200 + n/5530 - 2200

insens350 [35]

Answer:

n = 19.89694

Step-by-step explanation:

You can work the problem using decimal numbers. There is no need to convert everything to integers. Trying to do so just gets you in trouble.

Subtract 2.2 from both sides:

-1.398 -2.200 = n/-5.53

-3.598 = n/-5.53

Now, multiply both sides by -5.53:

(-5.53)(-3.598) = n = 19.89694

_____

The one rule that cannot be violated in algebra is that you must do the same thing to both sides of the equation.

_____

Your "solution" so far has a couple of errors. The first is that you have apparently multiplied all of the numbers by 1000. Unfortunately, when you multiply a denominator by 1000, it is the same as dividing by 1000. So, you have multiplied the left side by 1000, multiplied one term on the right by 1000 and divided another term on the right by 1000. This turns the equation into something different than what you started with, and will give a wrong answer.

The second error is that you have subtracted 2200 only from the right side. This, too, will turn the equation into something different than what you started with, and will give a wrong answer.

7 0

4 years ago