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Helga [31]
2 years ago
8

title="\frac{2+h}{9}+\frac{h-1}{3}=\frac{1}{3}" alt="\frac{2+h}{9}+\frac{h-1}{3}=\frac{1}{3}" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
yKpoI14uk [10]2 years ago
6 0

Step-by-step explanation:

Multiply both sides by 9 and you will get

2 + h + 3(h - 1) = 3

or

2 + h + 3h - 3 = 3

Solving for h, we get

4h = 4 \Rightarrow h = 1

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Part of the graph of the function f(x) = (x - 1)(x + 7) is
algol [13]

Answer:

True: B, C and D

Step-by-step explanation:

The graph of the function is shown in the attached diagram.

The vertex of the parabola (parabola is the graph of the function f(x)) is at (-3,-16), because

x_v=\dfrac{1+(-7)}{2}=-3\\ \\y_v=f(-3)=(-3-1)(-3+7)=-4\cdot 4=-16

So, option A is false and option B is true.

As you can see from the graph, the function is increasing for all x>-3, thus option C is true.

The graph is positive for x<-7 and x>1 and negative for -7<x<1, so option D is true and option E is false.

8 0
3 years ago
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The area of David's living room is 18.087 square yards, and their bedroom has an area of 15.78 square yards.Round to the nearest
Darina [25.2K]
Q. The area of David's living room is 18.087 square yards, and their bedroom has an area of 15.78 square yards.Round to the nearest tenth and estimate the amount of carpet they need to buy. PLZ HELP!!

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7 0
3 years ago
What are non examples of area(math)
solong [7]

Answer:

the lenght around an object

Step-by-step explanation:

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2 years ago
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Step-by-step explanation:

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2 years ago
Sales fall from 300 per week to 270 per week what’s the percentage change
weeeeeb [17]
Hi there! 

Your question: 

Sales fall from 300 per week to 270 per week what's the percentage change?

My answer:

The formula for calculating percent change is as follows: 

[(y2 - y1)/y1]*100=your percent change 

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Plug the numbers in: 

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0.1*100

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Therefore, the percent change is 10%

Hope this helps! Let me know if it's incorrect so I can fix it:)
8 0
3 years ago
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