Answer:
Step-by-step explanation:
John's age = w
His brother's age = 2*w = 2w
His sister's age = 16 years
Total age of all siblings = 31
w + 16 + 2w = 31
w + 2w + 16 = 31
Combine like terms
3w + 16 = 31
Subtract 16 from both sides
3w = 31 - 16
3w = 15
w = 15/3
w = 5
His brother's age = 2w
= 2*5
= 10
The function that could represent the value of a rare coin that increases over time is; y = ²/₃x + 2
<h3>How to create linear equations?</h3>
We want to find which of the equations below could represent the value of a rare coin that increases over time
y = -³/₂x + 1
y = -²/₃x - 7y
y = ²/₃x + 2
y = ³/₂x - 6
Now, the general form of a linear equation in slope intercept form is;
y = mx + c
where;
m is slope
c is y-intercept
Now, for the equation to be increasing over time, it means the slope must be positive and the y-intercept must also be positive.
Looking at the given options, the only one where slope and y-intercept is positive is y = ²/₃x + 2
Read more about Linear Equations at; brainly.com/question/13738662
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18(x)=100×43.
18(x)=4300.
Now divide both sides by 18. The number is x=238<span>.</span>
That would be (126 - 120) / 120 = 5/120 = 5%
Its b
We have
x>=-2
x<=6
y>=-1
y<=4
using a graph tool
see the attached figure
the solution is the figure of a rectangle <span>limited by points
</span>(-2,-1) (6,-1) (-2,4) (6,4)
the answer is
a rectangle
a parallelogram (rectangles<span> are subsets belonging to the set of </span><span>parallelograms)</span>
