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RUDIKE [14]
3 years ago
5

F(x)=-x^2+8x-20 find the min/max value

Mathematics
1 answer:
saveliy_v [14]3 years ago
5 0
Use the formula 
-b/2(a)
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The sum of the ages of Noi's and Noy's is 26 years. The different between four times Noi's age and two times Noy's age is 28 yea
nlexa [21]

Answer:

The age of Noi is 13.333 Years and the age of Noy is 12.67 years

Step-by-step explanation:

The given  information are;

The sum of the ages of Noi and Noy = 26 years

Four times Noi's age - Two times Noy's age = 28

Let the age of Noi = X and let the age of Noy = Y

We have;

X + Y = 26 years.................(1)

4X - 2Y = 28 years.............(2)

Divide equation (2) by 2 to get;

(4X - 2Y)/2 = (28 years)/2 which gives;

2X - Y = 14 years.................(3)

Add equation (3) to equation (1), to get;

X + Y +  2X - Y = 26 years + 14  years

3X = 40 years

X = 40/3 = 13.333 Years

From equation (1), X + Y = 26 years, therefore;

Y = 26 - X = 26 - 13.33 = 12.67 years

Therefore, the age of Noi = 13.333 Years and the age of Noy = 12.67 years.

3 0
4 years ago
Which of the following is true of histograms? (Check all that apply.)
Leviafan [203]

1:

A - actually not true, a probability plot would be better

B - not true, since exact values are plotted a box-and-whisker would be better

C - true (that's what a histogram does)

D - True (You can get the measures of central tendency quickly)

2:

A - true

B - False - those are easily found

C - False - They are arranged on the x-axis

D - True - see above

4 0
3 years ago
Suppose that a company claims that its batteries last 240 hours on average.
VashaNatasha [74]

Answer:

The answer is option B. 240

5 0
3 years ago
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ALGEBRA 1<br><br> REARRANGING AND SOLVING LINEAR EQUATIONS AND INEQAULITIES
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Cx-4=7
cx=11
x=11/c
Use inverse operations to isolate x on one side of the equation.
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1. Beyunka and Latoya competed in a bowling tournament. Their scores are displayed below. If Latoya won, what statistical measur
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D . range makes the most sense to me
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3 years ago
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