Answer:
Step-by-step explanation:
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Answer:
Numbers are 6 and 17.
Step-by-step explanation:
Let the two numbers are 'a' and 'b'.
"Sum of these numbers = 23"
a + b = 23 --------(1)
"One number is 7 less than 4 times the other"
a = 4b - 7 ---------(2)
Substitute the value of 'a' in equation (1) from equation (2)
(4b - 7) + b = 23
5b - 7 = 23
5b = 23 + 7
5b = 30
b = 6
From equation (2),
a = 4b - 7
a = 4×6 - 7
a = 24 - 7
a = 17
Therefore, the numbers are 6 and 17.
From the information given, the differential equation will be di/dt = (E - Ri) / L.
<h3>How to calculate the differential equation</h3>
From the information given, we can set up the differential equation as:
-E(t) = Ldi(t)/Dr + Ti(t) = 0.
Here, i(t) = I
E(t) = E
Therefore, this will be:
= -E + Ldi/dt + Ri = 0
We'll now solve for di/dt
Ldi/dt = E - Ri
di/dt = (E - Ri) / L
Learn more about differential equations on:
brainly.com/question/1164377
Answer:
Each eraser costs $5.00.
Step-by-step explanation:
In the question, it says that John had bought a $5.00 magazine. So, we already know that he used $5.00 for a magazine, and used up exactly $25.00. This must mean that he used $5.00 for each eraser because he used up $20.00 for four erasers. 4x5 = 20.
