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Mademuasel [1]
3 years ago
8

3. Solve the system of equations using linear combination. a + c = 9 8a + 4.5c = 58

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
7 0
A+c=9 so a=9-c
8(9-c)=72-8c+4.5c=58
12.5c=58-72
12.5c=-14
c=-1.12
lana66690 [7]3 years ago
5 0
Hey I have posted a picture the method I use to solve simultaneous equations is change the sign and follow the new sign.
This involves changing the sign for the second equation and solving it

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a semicircular flower bed has a diameter of 3m. What is the area of the flower bed. Give answer to one decimal place
MAVERICK [17]
You use the cricle fourmla (πr sqaure). and you will get 7.065
7 0
4 years ago
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Pavlova-9 [17]

Answer:

First answer:

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Second answer:

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liberstina [14]
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3 years ago
Turn -8 7/11 into a decimal
mixas84 [53]

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6 0
1 year ago
Read 2 more answers
Rounded to three decimal places, the value of the irrational number e is .A.3.142B.3.615C.2.718D.2.947
notka56 [123]

REQUIRED:

Round to 3 decimal placed the value of the irrational number e.

Step-by-step solution/explanation;

The letter e in mathematics is also known as the Eular's number and is a mathematical constant used in many calculations especially natural logarithms of numbers.

The value of the Eular's number is approximately;

e\approx2.71828182846...

It can continue till infinity, however approximations of this number is always used to avoid unnecessary complications.

Therefore, rounded to 3 decimal places, the value of e is now;

ANSWER:

e\approx2.718

Note that we take 3 digits aftre the decimal and then if the fourth digit after the decimal is 5 or greater than 5, we make it 1 and add that 1 to the third digit after the decimal. Otherwise we simply make it zero and cancel it along with all other digits after it.

The digit that follows 8 (third digit) is less than 5, therefore, we write it off along with all other digits after it, and we are left with the decimal point and then ...718.

Option C is the correct answer.

8 0
1 year ago
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