When faced with an unknown variable in a maths problem, it is advised to find the subject formula and then use it to solve the equation to find the answer.
<h3>What is an Unknown Variable?</h3>
This refers to the type of variable in a given equation that has to be solved for because its properties or value is not known.
Hence, we can see that when faced with an unknown variable in a given math problem, it is better to find the subject formula, then input the value of this into an equation, to find the value of the variable.
Read more about unknown variables here:
brainly.com/question/2133551
#SPJ1
The value of x when h(x) = -1 is 3.5
Step-by-step explanation:
In the function f(x) = y
- x is the input
- y is the output
∵ h(x) = -6x + 20
∵ h(x) = -1
- Substitute h(x) by -1 in the function above to find the value of x
∴ -1 = -6x + 20
- Subtract 20 from both sides
∴ -1 - 20 = -6x + 20 - 20
∴ -21 = -6x
- Divide both sides by (-6)
∴
∴ 3.5 = x
The value of x when h(x) = -1 is 3.5
Learn more:
You can learn more about functions in brainly.com/question/9801816
#LearnwithBrainly
The answer will be Log₁₀[(20(x⁵)]-1. So the correct answer will be option E.
<h3>What is an expression?</h3>
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.
The solution to the given expression is as follows:-
E = 5Log₁₀x + Log₁₀(20) - Log₁₀10
{ By applying logarithmic properties:-
aLog₁₀b= Log₁₀b^a and Log₁₀a + Log₁₀ b = Log₁₀ ( a x b) and Log₁₀10 = 1 }
E = Log₁₀(x)⁵ + Log₁₀(20) - 1
E = Log₁₀[20(x)⁵]-1
Therefore answer will be Log₁₀[(20(x⁵)]-1. So the correct answer will be option E.
To know more about Expression follow
brainly.com/question/723406
#SPJ1
Formula for number of sides, n = 360 / e
Where e is the exterior angle for the number of sides.
e = 21.2°
Number of sides for the regular polygon, n = 360° / 21.2°
n ≈ 16.98
The number of sides is approximately 16.98 sides..Does that make sense?
It does not. In fact, the exterior angle of a regular polygon has to be wholly divisible into 360°.
In the case 21.2° can't clearly be the exterior angle, the question is wrongly set.
The exterior can be say 20°.