f(2) = 2^2 + 2 + 1
= 4 + 2 + 1
= 7
Explanation:
Let’s take kids as x and adults as y
According to the question,
5x + 2y = 25 (1)
3x + 1y = 14 (2)
Let’s multiply (2) with 2 so take we can solve the equations
5x + 2y = 25
6x + 2y = 28
(-) (-) (-)
___________
-1x = = -3
x = 3
Substituting to get y
3x + 1y = 14
3(3) + y = 14
y = 14-9
y = 5
Answer:
Therefore, each child’s skate rental (x) costs $3 and each adults’s skate rental (y) costs $5
Hope it helped! :)
The amount of Columbian's coffee is 0.25 pounds and Kona's coffee 4.75 pounds.
Data;
- Columbian coffee = $4.40
- Kona coffee = $7.60
Let the value of Columbian coffee be represented by x
Let the value of Kona coffee be represented by y
<h3>System of Equation</h3>
To solve this problems, we need to write a system of equations of this problem.
From equation (ii), let's make x the subject of formula
Substitute equation(iii) into equation(i)
Let's substitute this value into equation(ii)
From the calculations above, the amount of Columbian's coffee is 0.25 pounds and Kona's coffee 4.75 pounds.
Learn more on system of equations here;
brainly.com/question/14323743
The answer is -6...
I got this by converting the problem into a variable problem.
-x*5=-30
Therefore, "x" is -6
By working with the given linear equation we will see that:
a) n = (d + 2)/4
b)
- A 3-penny nail is_5/4_inches.
- A 6-penny nail is_2_inches.
- A 10-penny nail is_3_inches.
<h3>
How to solve the equation for n?</h3>
Here we have the linear equation:
d = 4n - 2
We want to solve it for n, it means that we need to isolate n in one side of the equation.
If we first add 2 in both sides of the equation, and then we divide both sides by 4, we will get:
d + 2 = 4n
(d + 2)/4 = n
That is the equation solved for n.
b) The penny size is d, and n is the length of the nail, then:
if d = 3, we have:
n = (3 + 2)/4 = 5/4
if d = 6, then:
n = (6 + 2)/4 = 2
if d = 10, then:
n = (10 + 2)/4 = 3
Thus:
- A 3-penny nail is_5/4_inches.
- A 6-penny nail is_2_inches.
- A 10-penny nail is_3_inches.
if you want to learn more about linear equations:
brainly.com/question/1884491
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