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Burka [1]
3 years ago
13

Suppose you are researching the eating habits of people your age. What sampling method could you use to find the percent of stud

ents in your grade who eat five servings of fruit and vegetables each day? What is an example of a survey question that does not have bias?
Mathematics
1 answer:
Rudik [331]3 years ago
4 0

Answer:

You can wait at the front of the luchline and survey every tenth student.

Step-by-step explanation:

This way it is equal for everyone.

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a rectangle has a length 3 meters more than three times the width. the area of the rectangle is less than 90 meters squared. wri
Natasha2012 [34]

Answer: -6<x<5

Step-by-step explanation:

Given

Length is 3 m more than three times the width

Suppose width is x

So, the length is 3x+3

The area of a rectangle is  length\times width

Area= (3x+3)x

\Rightarrow 3x^2+3x-90

6 0
2 years ago
Which direction does the graph of the equation shown below open?<br><br> y2+16y-4x+4=0
zhuklara [117]
We are asked to determine the opening of the graph of the given equation y² + 16y - 4x  + 4= 0. To answer this problem, we need to transform the equation into the standard form where all variable y and variable x are in opposite side such as shown below:
y² + 16y - 4x + 4 = 0
y² + 16y = 4x - 4
y² + 16y + 64 = 4x - 4 +64
(y + 8)² = 4x + 60

Then, the graph opens to the right. 
5 0
3 years ago
Read 2 more answers
Which expression is equivalent to 3⋅3⋅3⋅3? 4³ 34 3³
ella [17]

Answer:

3^{4}

Step-by-step explanation:

3^{4}

5 0
2 years ago
Please help me with the below question.
VMariaS [17]

By letting

y = \displaystyle \sum_{n=0}^\infty c_n x^{n+r}

we get derivatives

y' = \displaystyle \sum_{n=0}^\infty (n+r) c_n x^{n+r-1}

y'' = \displaystyle \sum_{n=0}^\infty (n+r) (n+r-1) c_n x^{n+r-2}

a) Substitute these into the differential equation. After a lot of simplification, the equation reduces to

5r(r-1) c_0 x^{r-1} + \displaystyle \sum_{n=1}^\infty \bigg( (n+r+1) c_n + (n + r + 1) (5n + 5r + 1) c_{n+1} \bigg) x^{n+r} = 0

Examine the lowest degree term \left(x^{r-1}\right), which gives rise to the indicial equation,

5r (r - 1) + r = 0 \implies 5r^2 - 4r = r (5r - 4) = 0

with roots at r = 0 and r = 4/5.

b) The recurrence for the coefficients c_k is

(k+r+1) c_k + (k + r + 1) (5k + 5r + 1) c_{k+1} = 0 \implies c_{k+1} = -\dfrac{c_k}{5k+5r+1}

so that with r = 4/5, the coefficients are governed by

c_{k+1} = -\dfrac{c_k}{5k+5} \implies \boxed{g(k) = -\dfrac1{5k+5}}

c) Starting with c_0=1, we find

c_1 = -\dfrac{c_0}5 = -\dfrac15

c_2 = -\dfrac{c_1}{10} = \dfrac1{50}

so that the first three terms of the solution are

\displaystyle \sum_{n=0}^2 c_n x^{n + 4/5} = \boxed{x^{4/5} - \dfrac15 x^{9/5} + \frac1{50} x^{13/5}}

4 0
2 years ago
What is the circumference?<br> 30 ft
valentinak56 [21]

Answer:

94.248 feet

1,131.0 inches

94′ 3″ feet and inches

28.727 meters

2,872.7 centimeters

Step-by-step explanation:

4 0
2 years ago
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