Answer:
Domain: (-4, ∞)
Range: (-∞,∞)
Step-by-step explanation:
Domain is all of your possible x values and range is all of the possible y values. I may have wrote the brackets wrong but the values are wright.
We are given proportion as 14/x = 1/2
So first step is to get rid off 2 from denominator,so we multipy both sides by 2
2(14/x) =2(1/2)
28/x =1
Next step is to get rid off x from denominator ,so we multiply both sides of the equation by x
x(28/x) =x(1)
28x/x =x
28 =x
Hence we get value of x =28
So answer is choice d) 28
20
If you draw that out on a coordinate grid, you get a trapezoid with one base 6 units long, one base 4 units long and a height of 4. Using the formula for area of a trapezoid
h(b1 + b2)/2
where h is the height, 4, b1 is a base, 6, b2 is the other base, 4, we get
4(4+6)/2
which is 4(10)/2 or 40/2
which gets us the answer, 20
77% decrease
77% increase
73% increase
The percent of change from 100 to 27 is a 73% decrease. The percent of change is the value of a variable to which it gains or losses its magnitude.
The percent of change is calculated as follows:
% change = 100 × [final value - initial value]/(initial value)
The initial value is 100 and the final value is 27
So, the percent of change is
% change = 100 ×
= 100 × (-0.73)
= -73%
The negativesign indicates a decrease from the initial value to the final value.
Therefore, the percent of change from 100 to 27 is a 73%decrease. So, option A is correct.
Learn more about the percent of change here:
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