The sum of 5x and 2x is at least 14
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20y=2
20y/20=2/20
y=0.1
17y +3=
17y=-3
17y/17=-3/17
y=-0.176
5
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Answer:
Step-by-step explanation:
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7
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The value of y in the given equation is 7.
The given equation is:
2(2y -14)= 0
Bydividing 2 from both the sides, we get:
⇒2y -14= 0
Adding 14 on both the sides, we get;
2y =14
On dividing 2 from both sides, we get;
y=7
Hence, the value of y is 7.
What is an example of an equation?
An equation is a mathematical statement that is made up of two expressions connected by an equal sign. For example, 3x – 5 = 16 is an equation
What is an equation easy definition?
A statement of the equality of two mathematical expression . An expression representing a chemical reaction by means of chemical symbols. equation.
Learn more about equations, refer to:
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B. 8.9 in.
C. 10 in.
D. 9.1 in.
Answers
Answer:
x2 = 8.1 in (Option A)
Step-by-step explanation:
Given:-
- The extension of spring x1 = 9 in
- The weight hanged F1 = 100 lbs
Find:-
How far will it stretch with 90 pounds attached?
Solution:-
- The linear extension x of spring is proportional to the amount of force F applied to the spring.
F = k*x
Where, k = is the proportionality constant called stiffness of the spring.
- We will first determine the spring stiffness k using the given data as follows:
F1 = k*x1
100 = k*9
k = 100 / 9
- Now, we will determine the amount with which the spring stretches x2 when the hanged weight is changed to F2 = 90 lbs. Using the first relation we plug in the value of proportionality constant (stiffness) k.
F = (100 / 9)*x
F2 = (100 / 9)*x2
90 = (100 / 9)*x2
x2 = 810 / 100
x2 = 8.1 in
- The amount of spring stretches when the applied load of weight hanged is changed to F2 = 90 lbs is x2 = 8.1 in.
explanation
------------------------------------------------------------------------
! Inches ! Inches ! Pounds ! Pounds !
! 9 : 10 ! Sum ! ! sum !
-------------------------------------------------------------------------
! 0,9 ! 0,9*1 = 09 ! 10 ! 1*10 = 10 !
------------------------------------------------------------------------\
! 0,9 ! 0.9*2 = 1,8 ! 10 ! 2*10 = 2 0 !
! 0,9 ! ! 10 ! !
-----------------------------------------------------------------------
! 0,9 ! 0,9*3 = 2,7 ! 10 ! !
! 0,9 ! ! 10 ! 3*10 = 30 !
! 0,9 ! ! 10 ! !
-------------------------------------------------------------------------
for every pound falls 0.9 inches
derived unit of proportion :
n/2-n- 2/n-2.
a. 2-n/n+2
b. 1
c. n+2/2-n
d. -1