I can not figure this out for anything. pls help me.

A bag contains yellow marbles and blue marbles, 23 in total. The number of yellow marbles is 7 less than 2 times the number of b

steposvetlana [31]

Answer:

b=10, a=13

Step-by-step explanation:

let s number of yellow = a

number of blue = b

we have

a+b =23

2b - a = 7

->a+b +2b -a = 23+7

-> 3b = 30

->b = 10

->a = 13

3 0

3 years ago

For three consecutive years, Sam invested some money at the start of the year. The first year, he invested x dollars. The second

wariber [46]

To answer we let x be the amount of money that Sam invested during the first year.

Below are the expressions translated from the given word forms for the amount invested.

Sam:
2nd year : amount = 5x/2 - 2000
3rd year : amount = x/5 + 1000

The sum of money invested by Sam is:
x + (5x/2 - 2000) + (x/5 + 1000)

Similarly, we derive the expressions that we use for the amount that Sally invested.
Sally
1st year : amount = 3x/2 - 1000
2nd year : amount = 2x - 1500
3rd year : amount = x/4 + 1400

The total amount that Sally invested is,
total = (3x/2 - 1000) + (2x - 1500) + (x/4 + 1400)

Equating the two equations:
(x) + (5x/2 - 2000) + (x/5 + 1000) = (3x/2 - 1000) + (2x - 1500) + (x/4 + 1400)

Solving for x,
x = 2000
For Sally's investment in the third year:
amount = x/4 + 1400 = (2000/4 + 1400) = 1900

ANSWERS:
Sam's first year = $2000
Sally's third year = $1900

3 0

4 years ago

What is the m<M Part B: what is the m<Q

KengaRu [80]

Oh okie oh gosh oh I don’t know

3 0

3 years ago

1.out of 100 students it was found that 65 liked volleyball,55 liked football and 35 liked both the games.find how many students

Elza [17]

S = Universe of discourse, A = students that likes volleyball, while B likes football

3 0

3 years ago

Solve each system by graphing: 4x + 6y = -12 2x + 3y = 6

Helga [31]

Answer: For the system given, there is no solution.

The slopes are the same for both equations, so the lines are parallel. With no intersection, there is no solution.

It may be easier to graph the system if you change the equations to slope intercept form y = mx + b

That locates the y-intercept, b and you can use the slope, m to plot additional points to draw the lines.

The attachment shows the graph of this system of equations.

Step-by-step explanation: Isolate y on the left

First equation:

4x + 6y = -12 Subtract 4x from both sides

6y = -4x -12 Divide both sides by 6

y = -4x/6 -12/6 Simplify

y = -2x/3 - 2 The y-intercept is -2, the slope is -2/3

Second equation:

2x + 3y = 6 Subtract 2x from both sides

3y = –2x + 6 . Divide both sides by 3

y = –2x/3 + 6/3 Simplify

y = –2x/3 +2 The y-intercept is -2, the slope is -2/3

At this point we see that the slopes are the same, so the lines are parallel.

6 0

3 years ago

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