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Leya [2.2K]
3 years ago
13

Which mathematical operation is the inverse of addition

Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
7 0
Additive inverse is the number multiplied with -1 such that the sum of the number and the additive inverse will result in 0.
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If an emitter current is changed by 4 mA, the collector current changes by 3.5 mA. The value of beta will be :​
Tems11 [23]
<h3>Given -:</h3>

change in emitter current, ∆l(E) = 4 mA

change in collector current,∆I(C) = 3.5 mA

<h3>To find -:</h3>

value of B

<h3>Solution :-</h3>

∆I(E) = ∆I(C) + ∆l(B), here ∆l(B) is the change in base current.

4 = 3.5 + ∆l(B)

∆I(B) = 0.5 mA

<h3>Now, B = ∆l (C) ÷ ∆l (B)</h3>

B = 3.5 ÷ 0.5

B = 7.0

<h3>so, the value of A = 7.0</h3>

8 0
2 years ago
Help needed! - Geometry - 15 points - One question -
il63 [147K]

Answer: m<VUT= 70 degrees

Step-by-step explanation:

120= 50+ ?

?=70

6 0
3 years ago
a TV has a listed price of 813.95 before tax if the sales tax rate is 6.5% find a total cost of the tv with the sales tax includ
shusha [124]
The tax is 6.5% OF the listed price. "OF" in math means multiply.

First convert the percentage to a decimal 

6.5% = .065

Then multiply .065*813.95 = 52.90675. This is the tax.

Simply add the tax onto the cost

813.95 + 52.90675 = $866.86 (rounded)
5 0
3 years ago
Read 2 more answers
Natalie is a softball coach. She has a pitching private lesson with Kasey. Kasey’s mom pays Natalie $11 per hour plus a $6 tip.
nevsk [136]

Answer:

3

Step by Step:

Subtract the tip ($6) from the total ($39)

11x=33

Then divide 33 by 11, leaving you with the value of x.

x=3

The lesson was 3 hours long.

6 0
2 years ago
Paul has $78 in the bank and saves $30 each week. What is the initial value? Be sure to use negative signs if needed.
marin [14]

Answer:

The initial value is $78

Step-by-step explanation:

Given

Base\ Amount = \$78

Additional = \$30 (weekly)

Required

Determine the initial value

The initial value is the amount he has in its bank account before making his weekly savings.

From the question, we have that his initial balance is $78.

Hence, the initial value is $78

However, his weekly balance can be expressed as:

Balance = Base\ Amount + Additional * number\ of weeks

Represent number of weeks with x; So, we have:

Balance = 78 + 30 * x

Balance = 78 + 30 x

6 0
3 years ago
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