Only (a) describes a one-to-one function. (b) fails because
![f(a)=f(b)=b](https://tex.z-dn.net/?f=f%28a%29%3Df%28b%29%3Db)
; similarly, (c) fails because
![f(a)=f(d)=d](https://tex.z-dn.net/?f=f%28a%29%3Df%28d%29%3Dd)
.
Answer:
A
Step-by-step explanation:
subtract 5 from all parts to get
-15 < 3x < 21
Divide each part by 3 to get
-5 < x < 7
Answer:
π(4)²(16)
Step-by-step explanation:
Given r = 4, h = 16
Use formula for cylinder:
Volume of cylinder,
V = πr²h
= π(4)²(16)
The correct expression of the inequality expression is 21% > 1/5
<h3>How to complete the inequality expression?</h3>
From the question, the expression is given as
21% < or > 1/5
We start by converting the above expression to the same form
Take for instance, we convert the expressions to decimals
So, we have
21% = 0.21
1/5 = 0.20
This gives
0.21 < or > 0.20
When the above numbers are compared, we have
0.21 is greater than 0.20
This means that we make use of the inequality symbol >
So, we have
0.21 > 0.20
Substitute 21% = 0.21 and 1/5 = 0.20
21% > 1/5
Hence, the complete inequality is 21% > 1/5
Read more about inequality at
brainly.com/question/25275758
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Using linear function concepts, it is found that the unit rate in dollars per square yard is of $1.35 for Company A and of $2.05 per Company B.
<h3>What is a linear function?</h3>
A linear function is modeled by:
![y = mx + b](https://tex.z-dn.net/?f=y%20%3D%20mx%20%2B%20b)
In which:
- m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
- b is the y-intercept, which is the value of y when x = 0.
In this problem, for company A, the function is:
A: C = 1.35y + 100.
For company B, the function is:
B: C = 2.05y.
Considering the slopes, the unit rate in dollars per square yard is of $1.35 for Company A and of $2.05 per Company B.
More can be learned about linear function concepts at brainly.com/question/24808124