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4 years ago

Decide if each sample is random. Explain why or why not.

Mathematics

1 answer:

julsineya [31]4 years ago

5 0

Answer:

a- no they are polling

b-yes there is no point

Step-by-step explanation:

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Mrs. Delgado needs to buy 160 begonias for her flowerbed. At the prices shown, how much would she save if she bought them by the

wlad13 [49]

Answer:

$\$46.40$

Step-by-step explanation:

step 1

Find out the price of 160 begonias, if she bought them separately

$160(\$1.79)=\$286.40$

step 2

Find out the price of 160 begonias, if she bought them by the flat

Remember that

One flat are 20 plants

For 160 plants are needed

160/20=8 flat

$8(\$30)=\$240$

step 3

Find out the difference

$\$286.40-\$240=\$46.40$

8 0

3 years ago

Give the equation of the line, perpendicular to the line with equation y=2x+1, that passes

katrin [286]

Answer:

y=-1/2x+2

Explanation:

8 0

3 years ago

The height of a statue is 276 inches. What is the hieght of the statue in meters? Round your answer to the nearest hundredth.

True [87]

1 inch = 0.0254 meters

276 inch = 7.0104

6 0

3 years ago

Read 2 more answers

Adriana, Henry, Malik, and Richard each design surveys to determine the most popular way seventh graders purchase music. Adriana

jok3333 [9.3K]

The sample which is likely to produce the most valid result is Richard's sample because there was no statistical bias. Statistical bias is the systematic favoritism of certain individuals in the study. Just like what Adriana, Henry and Malik did in conducting their surveys, they choose people who are point of interest and also who are near them. In the way Richard conducted his survey, he used a random sampling technique, this is a method of selecting a sample from a population in such a way that every possible individual can be chosen and he doesn't know who these people are.

3 0

3 years ago

Read 2 more answers

Find the zero of each function and state the multiplicity of each zero. Please show all steps.

vodka [1.7K]

Answer:

1. y=(x+3)^3. Zero: x=-3 multiplicity 3.

2. y=(x-2)^2 (x-1). Zeros: x=2 multiplicity 2; x=1 multiplicity 1.

3. y=(2x+3)(x-1)^2. Zeros: x=-3/2 multiplicity 1; x=1 multiplicity 2.

Step-by-step explanation:

1. y=(x+3)^3

$y=0\\ (x+3)^3=0\\ \sqrt[3]{(x+3)^3}=\sqrt[3]{0}\\ x+3=0\\ x+3-3=0-3\\ x=-3$

Zero: x=-3 multiplicity 3.

2. y=(x-2)^2 (x-1)

$y=0\\ (x-2)^2(x-1)=0\\ \left \{ {{(x-2)^2=0} \atop {x-1=0}} \right\\ \left \{ {{\sqrt{(x-2)^2} =\sqrt{0} } \atop {x-1+1=0+1}} \right\\ \left \{ {{x-2=0} \atop {x=1}} \right\\ \left \{ {{x-2+2=0+2} \atop {x=1}} \right\\ \left \{ {{x=2} \atop {x=1}} \right.$

Zeros: x=2 multiplicity 2; x=1 multiplicity 1

3. y=(2x+3)(x-1)^2

$y=0\\ (2x+3)(x-1)^2=0\\ \left \{ {{2x+3=0} \atop {(x-1)^2=0}} \right\\ \left \{ {{2x+3-3=0-3} \atop {\sqrt{(x-1)^2} =\sqrt{0} }} \right\\ \left \{ {{2x=-3} \atop {x-1=0}} \right\\ \left \{ {{\frac{2x}{2} =\frac{-3}{2} } \atop {x-1+1=0+1}} \right\\ \left \{ {{x=-\frac{3}{2} } \atop {x=1}} \right.$

Zeros: x=-3/2 multiplicity 1; x=1 multiplicity 2.

4 0

3 years ago