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o-na [289]
4 years ago
7

3x+3y=-3 solve using the elimination

Mathematics
1 answer:
timofeeve [1]4 years ago
5 0

Simplifying

3x + 3y = -3

Solving

3x + 3y = -3

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-3y' to each side of the equation.

3x + 3y + -3y = -3 + -3y

Combine like terms: 3y + -3y = 0

3x + 0 = -3 + -3y

3x = -3 + -3y

Divide each side by '3'.

x = -1 + -1y

Simplifying

x = -1 + -1y

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Mary got a sales job at her father's company. She was paid $9 per hour plus a 5%commission on her sales. Last week sheworked 40
horsena [70]

Answer:

Mary was paid $638

Step-by-step explanation:

Mary was paid 360 $ for working alone because

$40 * 9 = $360

Mary was paid $278

5 % * $5560 = $278

360 + 278 = 638 $

5 0
3 years ago
Evaluate - 4/8 ./. 8 2/3
LenaWriter [7]

Answer:

The answer is 13/3.

Step-by-step explanation:

8 2/3 is an improper fraction and is expressed as 26/3. CCF (copy, change, flip) is then applied to the division statement and 26/3 to becomes 4/8*26/3. The final answer is 104/24 which simples to 13/3.

3 0
3 years ago
On your next turn in a board game there is a 60% chance that you will move ahead 4 spaces and a 40% chance that you will move ba
Vika [28.1K]
The expectation value is simply obtained by multiplying the probability of each outcome by each possible value. These are then summed for each outcome to obtain the expectation value. In the board game, if there is a 60% chance that you will move 4 spaces forward (+4) and a 40% chance that you will move back 2 spaces then expected value for number of spaces is (0.6 x 4) + (0.4 x -2) = 2.4 - 0.8 = 1.6 spaces. 
8 0
3 years ago
A teacher has two students, one two times as old as the other. The teacher is five times as old as the older student, and in 5 y
kramer
Let's call the younger student's age A and the older student's age B. The teacher's age will be T.

B = 2A
T = 5B
T+5 = 5(A+5)

Simplify the last equation.

T+5 = 5A+25
T = 5A+20

Now we have two equations solved for T, so we can set them equal to each other.

5B = 5A + 20

We can plug 2A in for B

5(2A) = 5A + 20

10A = 5A + 20

5A = 20

A = 4

To find T, we plug 4 in for A in T = 5A + 20

T = 5(4) + 20

T = 40

The answer is 40 years old.


6 0
3 years ago
Read 2 more answers
If m= 8, then evaluate 2(m+3)/11​
Ymorist [56]

Answer:

2

Step-by-step explanation:

Substitute m=8 into the equation

Firstly deal with the bracket

then multiplication

then division

2(11)/11

8 0
3 years ago
Read 2 more answers
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