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garri49 [273]
3 years ago
8

Find the sum of 8/10 + 7/10 ?

Mathematics
2 answers:
Alexus [3.1K]3 years ago
7 0
The answer is:  " 1\frac{1}{2} " ;  or; write as:  " 1.5 " .

8/10 + 7/10 = (8+7)/ 10 = 15/10= (15÷5) / (10÷5) = 3/2 ;
 
=  " 1\frac{1}{2} " ;  or; write as:  " 1.5 " .
____________________________________________
Annette [7]3 years ago
5 0
15/10 reduces to 1 1/2

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Answer:

A- X= 20÷5-3

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Step-by-step explanation:

Okay, well we have to work backwards. 20 cookies, and she makes 5 bags. We need to find out what 'x' means. To do that, we take 20 cookies and divide it by 5. 4 cookies. Then we want to take 3 cookies out of each bag to find out how many cookies she first put in. 1 cookie.

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\large\boxed{x\in[-5,\ \infty)}

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f(x)=\dfrac{1}{2}x^2+5x+6\\\\\text{The coeficient of}\ x^2\ \text{is the positive number. Therefore the parabola is op}\text{en up}.\\\\\text{If a parabola op}\text{en up, then the graph increasing in interval}\ (h,\ \infty),\\\text{and decreasing in interval}\ (-\infty,\ h).\ \text{Where}\ h\ \text{is a first coordinate of a vertex.}\\\\\text{For}\ y=ax^2+bx+c,\ h=\dfrac{-b}{2a}.\\\\\text{We have}\ a=\dfrac{1}{2}\ \text{and}\ b=5.\ \text{Substitute:}\\\\h=\dfrac{-5}{2\left(\frac{1}{2}\right)}=-\cdot\dfrac{5}{1}=-5.

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