Answer:
or 
Step-by-step explanation:
The image below shows step-by-step on how to solve it. It also shows that when solving for x, it can equal two possible answers.
Hope this helps! :)
It takes 28 minutes to manufacture the piece now.
<u>Step-by-step explanation:</u>
It is given that,
- A factory manufactures a metal piece in 32 minutes.
After the new technology,
- the factory cut that time by 8%.
Therefore, the time after the new technology is known by reducing the 8% of total time from the 32 minutes.
⇒ 8% of 32 = (8/100) × 32
⇒ 0.08 × 32
⇒ 2.56 minutes
The time after the new technology allowed = 32 minutes - 2.56 minutes
⇒ 29.44 minutes.
Again,
- the time is cut by 5% after the another improvement.
Therefore, the time after the another improvement is known by reducing the 5% of previous time 29.44 minutes.
⇒ 5% of 29.44 = (5/100) × 29.44
⇒ 0.05 × 29.44
⇒ 1.472 minutes
The time after the another improvement = 29.44 minutes - 1.472 minute
⇒ 27.9 minutes. (Which is approximately 28 minutes)
The two triangles formed will be ADB and BCD
Hope this helps :)
Use calculator for the solving:
12 / 24 - 3/216 +5600 -5554 = ?
Answer: 46.4861111111
Hopefully it's correct :)
Answer:
The true statements are:
the first statement: Systems A and C have the same solution
the fourth statement: System C simplifies to 2x - 3y = 4 and 4x - y = 18
the fifth statement: Systems A and B have different soltuoins.
Explanation:
1) The first statement: systems A and C have the same solutiotn: TRUE
The fourth statement proves that that the two systems are equivalent which means that both have the same solution.
2) The second statement: All three systems have different solutions: FALSE
The fourth statement proves that the systems A and C have same solution, so this second statement is false.
3) The third statement: Systems B and C have the same solution: FALSE
<span>You can solve the two systems and will find the solutions are different
Solution of system B.
3x - 4y = 5
y = 5x + 3
replace y = 5x + 3 in the first equation => 3x - 4(5x + 3) = 5
=> 3x - 20x - 12 = 5
=> - 17x = 5 + 12
=> -17x = 17
=> x = - 17 / 17
=> x = - 1
y = 5x + 3 = 5(-1) + 3 = - 5 + 3 = - 2
=> solution x = -1 and y = -2
Solution of system C.
2x - 3y = 4
12x - 3y = 54
subtract
</span>
4) fourth statement: System C simplifies to <span>2x - 3y = 4 and 4x - y = 18 by dividing the second equation by three: TRUE
Look:
Second equation of system C = 12x - 3y = 54
Divide by 3:
12x - 3y 54
----------- = -----
3 3
Distributive property:
12x 3y
------ - ----- = 18
3 3
4x - y = 18, which is the same second equation of system A, so the system C simplifies to the same system A, which is 2x - 3y = 4 and 4x - y = 18.
5) The fifth statement: systems A and B have different solutions: TRUE
</span><span>You can solve the two systems and will find the solutions are different
Solution of system A:
2x - 3y = 4
12x - 3y = 54 since it is equivalent to 4x - y = 18
-------------------
12x - 2x = 54 - 4 subtracting the first equation from the secon
10x = 50 adding like terms
x = 5 dividing by 10
From 2x - 3y = 4 => 3y = 2x - 4 = 2(5) - 4 = 10 - 4 = 6
=> y = 6 / 3 = 2
=> x = 5, y = 2
Solution of system B.
3x - 4y = 5
y = 5x + 3
replace y = 5x + 3 in the first equation => 3x - 4(5x + 3) = 5
=> 3x - 20x - 12 = 5
=> - 17x = 5 + 12
=> -17x = 17
=> x = - 17 / 17
=> x = - 1
Which is enough to prove that the two systems have different solutions.</span>
