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mina [271]
4 years ago
10

How should they divide the money so that each class gets the same fraction of the prize money as the fraction of the box tops th

at they collected?

Mathematics
1 answer:
bija089 [108]4 years ago
5 0

Figure the fraction of box tops each class collected, then multiply the prize money by that fraction.

Total box tops = 3760 +2301 +1855 = 7916

Mr Coronado's class's fraction: 3760/7916 × $600 = $284.99

Mrs De Souza's class's fraction: 2301/7916 × $600 = $174.41

Mr Nost's class's fraction: 1855/7916 × $600 = $140.60

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Use the given conditions to write and equation for the line in the indicates form:
stellarik [79]
We know that
the equation of the line in <span>slope-intercept form--------------> y=mx+b

Part A)
</span>Passing through (2,5) and perpendicular to the line whose equation is -3x+y-6=0

<span>Step 1
find the slope m
</span><span>remember that if two lines are perpendicular mi*m2=-1
</span>-3x+y-6=0---------> y=3x+6-------------> m1=3
then
m2=-1/3   

Step 2
find the value of b
point (2,5)  m=-1/3
y=mx+b----------> 5=(-1/3)*2+b--------> b=5+(2/3)-----> b=17/3

Step 3
find the equation of the line in slope-intercept form
y=(-1/3)x+17/3

using a graph tool
see the attached figure

the answer part A) is y=(-1/3)x+17/3

Part B)
Passing through (2,5) and perpendicular to the line whose equation is -3x-6=7x; slope intercept form.

Step 1
-3x-6=7x---------> 10x=-6 -----> x=-6/10-----> x=-3/5 (parallel to the axis y)
equation of the line is a constant so its perpendicular will be another constant defined by the coordinate y of the point through which it passes parallel to the axis x

point (2,5)  ----------> the coordinate y=5
therefore
the perpendicular line is y=5 (parallel to the axis x) 

using a graph tool
see the attached figure

the answer part B) is y=5

4 0
3 years ago
A bag of chips states that it contains 24 oz of chips. A sample of 40 bags finds a mean of 23.7 and a standard deviation of 0.2.
PIT_PIT [208]

Answer:

a) Null hypothesis:\mu \geq 24      

b) Alternative hypothesis:\mu < 40      

c) t=\frac{23.7-24}{\frac{0.2}{\sqrt{40}}}=-9.487      

d) df=n-1=40-1=39  

p_v =P(t_{39}  

e) Since the p value is almost 0 we have enough evidence to reject the null hypothesis at the significance level of 0.05

f) Since we reject the null hypothesis we have enough evidence to conclude the true mean is significantly less than 24 ounces

Step-by-step explanation:

Information provided

\bar X=23.7 represent the sample mean for the weigth in ounces

s=0.2 represent the standard deviation

n=40 sample size      

\mu_o =24 represent the value to verify

\alpha=0.05 represent the significance level

t would represent the statistic

p_v represent the p value

Part a

For this case the null hypothesis is:

Null hypothesis:\mu \geq 24      

Part b

And the alternative would be given by the claim:

Alternative hypothesis:\mu < 40      

Part c

We don't know the population deviation so then the statistic would be given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)      

And replacing the data given we got:

t=\frac{23.7-24}{\frac{0.2}{\sqrt{40}}}=-9.487      

Part d

The degrees of freedom are given by:

df=n-1=40-1=39  

And the p value for this case would be:

p_v =P(t_{39}  

Part e

Since the p value is almost 0 we have enough evidence to reject the null hypothesis at the significance level of 0.05

Part f

Since we reject the null hypothesis we have enough evidence to conclude the true mean is significantly less than 24 ounces

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20log_%7B10%7D%20%5C%3A%20x%3D%204" id="TexFormula1" title=" log_{10} \: x= 4" alt=" log_{10}
Alinara [238K]

Answer:

log_{10}(x )  = 4

the property of Logarithms,

log_a(x)= y \\ \implies x=a^y

so,

x =  {10}^{4}

7 0
4 years ago
Help me so I can ride my bike
QveST [7]
You add the like terms 
-3n+2+5n-7 

-3n+5 = 2n
2 -7 = -5 
2n -5 Is the answer
7 0
3 years ago
Round 348 to the nearest hundred. A. 350 b. 400 c. 300 d. 340
Tom [10]
B 400 will be your answer to 348
4 0
3 years ago
Read 2 more answers
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