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horsena [70]
3 years ago
15

What are Numbers? Why do we need them?​

Mathematics
1 answer:
il63 [147K]3 years ago
3 0
A number is a mathematical object used to count, measure, and label
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Find the exact solution of the system of equations of x^2+y^2-4x-6y+4=0 and x^2-4x-3y+4=0
gavmur [86]
We can readily know the x^2-4x+4=3y then use it to replace the same function in the first equation which refers to the 3y+y^2-6y=0 
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                                                             y(y-3)=0
                                                               y1=0 -----------y2=3
7 0
3 years ago
Select all the ordered pairs (x, y) that are solutions to the linear equation 2x+3y=6
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3 0
3 years ago
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Area of a triangle with a base length of 4in and a height of 9in
Aleks04 [339]
18 inches sqa-wared. "Nailed it!"
4 \times 9 =  36 \\ 36 \div 2 = 18
4 0
3 years ago
Evaluate the series 4 – 2 + 1 – 0.5 + 0.25 to S10. Round to the nearest hundredth.
aleksklad [387]
The initial term of this geometric series is 4, and the common ratio is -1/2. The sum is given by

S_{n}=a_{1}\dfrac{r^{n}-1}{r-1}\\\\S_{10}=4\cdot \dfrac{(-\frac{1}{2})^{10}-1}{-\frac{1}{2}-1}=4\cdot \dfrac{(\frac{1}{1024}-1)}{(-\frac{3}{2})}\\\\=\dfrac{8}{3}\cdot \dfrac{1023}{1024}=\dfrac{341}{128}

The sum is approximately 2.66.
4 0
3 years ago
Variable expression for 3 times the sum of x and 2
Lynna [10]
3(x+2)
Remember in expressions there’s no equals sign
Hope this helps!!
6 0
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