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Pani-rosa [81]
3 years ago
10

Subtract: 3a ( a+ b+ c) - 2b (a- b+ c) from 4c (-a + b + c)

Mathematics
1 answer:
Flura [38]3 years ago
6 0

Answer:

4c^2 - 3a^2 -7ac +6bc -ab

Step-by-step explanation:

solve first 3a( a + b + c) - 2b ( a+ b +c)

which is = 3a^2 + 3ab + 3ac - 2ab - 2b^2 -2bc

there for 4c(-a + b +c) -( 3a^2 + 3ab + 3ac - 2ab - 2b^2 - 2bc)

= -4ac-3ac +4bc+2bc -3ab+2ab + 4c^2 -3a^2

=4c^2 - 3a^2 -7ac +6bc -ab

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3. A mass spectrometer is an instrument that can be used to determine the mass of a substance. A student measured the mass of 3
Tju [1.3M]

The error that occurred is a systematic error.

<h3>What is random error?</h3>

Random error is a type of error that causes one measurement to differ slightly from the next.

<h3>What is systematic error?</h3>

Systematic error is a type of error that affects measurements in the same amount or by the same proportion, provided that readings are taken in the same way.

The three measurements 548.5 g, 548.9 g, and 548.7 g differ slightly but in the same amount and proportion.

Therefore, a systematic error occurred during the determination of the mass of the substance because the readings were taken in the same way and the measurement differ in the same amount.

Read more about error in measurement here:

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3 0
2 years ago
Kimberly makes a conjecture that the sum of two odd integers is always an even integer. Which choice is the best proof of her co
Gala2k [10]

Answer:

third choice : Let 2a + 1 be one odd number, and let 2b + 1 be the other odd number. (2a + 1) + (2b + 1) = 2a + 2b + 2 = 2(a + b + 1). Because 2(a + b + 1) is evenly divisible by 2, it is an even number.

You’re welcome ;)

7 0
3 years ago
Please help me I need help urgently
bazaltina [42]

Answer:

979.68in²

Step-by-step explanation:

3.14× 6² =226.08

3.14× 6×40 = 753.6

753.6 + 226.08 = answer stated above

3 0
3 years ago
The figure shown is made of two rectangles.
Eddi Din [679]
198 is the answer ok ok ok
4 0
2 years ago
Read 2 more answers
Let f(x) be a continuous function such that f(1) and f'(x)-Vx3 + 6. What is the value of,f(5)? (A) 11.446 (C) 24.672 (B) 13.446
tia_tia [17]

Answer:

f(5) = 26.672 which is option D

Step-by-step explanation:

From question, f(1) = 2 and f'(x)=√(x^3 + 6)

f(5) = f(1) + (5,1)∫ f'(x) dx

Integrating using the boundary 5 and 1;

f(5) = 2 + (5,1)∫√(x^3 + 6) dx

f(5) = 2 + 24.672

So f(5) = 26.672

7 0
3 years ago
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