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1 year ago

HELP ME PLZ I NEDD A ON ThIS SO GET ME RIGHT I WELL GIVE BAIRELEST

Mathematics

2 answers:

VARVARA [1.3K]1 year ago

8 0

Overall is our key word here. That means we want to figure out how many miles they drove in all. So, we need to add up how many miles there and back.

561 + 562 = 1123 miles

Hope this helps!

tamaranim1 [39]1 year ago

3 0

Answer:

It is 561 plus 562

Step-by-step explanation:

common sense bro, add the miles and youll get the total traveld

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If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

Korolek [52]

Answer:x=1, y=5

Step-by-step explanation:

3 0

3 years ago

A sample of 16 items from population 1 has a sample variance 5.8 and a sample of 21 items from population 2 has a sample varianc

Nady [450]

Answer:

Reject the null hypothesis.

Step-by-step explanation:

n1 = 16

n2 = 21

S.V1 = 5.8

S.V2 = 2.4

$\alpha$ = 0.05

$H_{0}$ = Population Variance 1 ≤ Population Variance 2

$H_{a}$ = Population Variance 1 > Population Variance 2

Test statistic value = 5.8 / 2.4 = 2.417

Degrees of freedom is n - 1

15 and 20

Critical value is $F_{0.05}$ = 2.2

2.417 > 2.2

we reject the null hypothesis as the critical value is greater than the test statistic.

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3 years ago

Scientists have discovered a vaccine for a debilitating disease. This year there were 570,000 reported new cases of the disease

Ket [755]

Answer: There are approximately 853827 new cases in 6 years.

Step-by-step explanation:

Since we have given that

Initial population = 570000

Rate at which population decreases is given by

$\frac{2}{3}$

Now,

First year =570000

Second year is given by

$570000\times (\frac{1}{3})$

Third year is given by

$570000(\frac{1}{3})^2$

so, there is common ratio ,

it becomes geometric progression, as there is exponential decline.

so,

$570000,570000\times \frac{1}{3},570000\times( \frac{1}{3})^2,......,570000\times (\frac{1}{3})^6$

a=570000

common ratio is given by

$r=\frac{a_2}{a_1}=\frac{1}{3}$

number of terms = 6

Sum of terms will be given by

$S_n=\frac{a(1-r^n)}{(1-r)}$

We'll put this value in this formula,

$S_6=\frac{570000(1-(\frac{1}{3})^6}{(1-\frac{1}{3})}\\\\=853827.16$

So, there are approximately 853827 new cases in 6 years.

6 0

2 years ago

Can someone explain to me how to do this and help me?

riadik2000 [5.3K]

put the percentage on the right and label it "% of parents who use it "

and at the bottom of the graph, put " types of parental control"

count the percentages by five's starting from 25

then just fill in the shading

8 0

3 years ago

The area of the top face of a cube is 49cm^3. What is the volume of th cube?

Vlad1618 [11]

Answer:

$V=2401cm^{3}$

Step-by-step explanation:

The fact that the figure is a cube means all sides, faces, and corners are equal.

$V=BHW$

$V=49cm^{2}(W)$

$V=49cm^{2}(49cm)\\ V=2401cm^{3}$

3 0

2 years ago