In the given expression ( f(x) = 2x² + 1 ) when when ( x = 3 ), the value of f(x) is 19.
Hence D)19 Is the correct answer.
<h3>What is an Equation?</h3>
An equation is simply a mathematical formula that expresses the equality of two expressions, using the equals sign as a connection between them.
Given that;
f(x) = 2x² + 1, what is (fx) when x = 3
We substitute 3 for x in the equation
f(x) = 2(3)² + 1
f(x) = 2(9) + 1
f(x) = 18 + 1
f(x) = 19
In the given expression ( f(x) = 2x² + 1 ) when when ( x = 3 ), the value of f(x) is 19.
Hence D)19 Is the correct answer.
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The simplified solution of the linear equation is determined as -18v - 5t = 4.
<h3>
What is linear equation?</h3>
A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation.
The given equation is a linear equation;
6(-3v+1)=5(2+t)
<h3>
Solution to the linear equation</h3>
The solution to the given linear equation is calculated as follows;
6(-3v + 1) = 5(2 + t)
open the brackets by multiplying with the coefficients
-18v + 6 = 10 + 5t
collect similar terms together
-18v - 5t = 10 - 6
-18v - 5t = 4
Thus, the simplified solution of the linear equation is determined as -18v - 5t = 4.
Learn more about linear equations here: brainly.com/question/14323743
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Answer:
120
Step-by-step explanation:
The number of ways to select things from a group of things is given by the combination formula.
Where n! means n*(n-1)*(n-2)....
- There are 10 total books, so n = 10
- you have to choose 3 books, so r = 3
Plugging these into the formula gives us:
Hence, there can be 120 different groups of 3 books that u can choose from 10 books total.
Answer:
30 times
Step-by-step explanation:
Jeanna : Haylee = 2 : 5
The number of times Haylee babysits in one month is unknown, so it is represented as x.
Write a new ratio to represent the scenario
2 : 5 = 12 : x
Ratios can be written as fractions
Rewrite
2/5 = 12/x
Cross multiply (numerator * denominator / numerator * denominator)
2x = 60
x = 30
Haylee babysat 30 times that month
Hope this helps :)
Answer:
Step-by-step explanation:
<u>Find b first:</u>
- b = 3/x + 3/y
- b = (3x + 3y)/xy
<u>Find 1/b:</u>
- 1/b = 1 : (3x + 3y)/xy
- 1/b = xy / (3x + 3y)