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3 years ago

PLEASE HELP ME ASAP

Mathematics

1 answer:

pickupchik [31]3 years ago

7 0

lol we have the same question on our test besides i’m in middle school Answer: idfk

Step-by-step explanation: don’t ask me i’m failing math

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It takes 3 minutes to walk 37.5 meters what is the speed.

VLD [36.1K]

You have to divide the amount of meters he walked by the time he spent, so 37.5 divided by 3. That equals 12.5 meters per minutes.

5 0

3 years ago

535=5 hundreds+how many tens +5 ones<br> 535= how many tens + 5 ones<br> 535=535 ones

weqwewe [10]

4 hundreds 13 tens 5 ones = 4*100+13*10+5*1=400+130+5= \boxed {535}

8 0

3 years ago

Read 2 more answers

A grower believes that one in five of his citrus trees are infected with the citrus red mite. How large a sample should be taken

kotegsom [21]

Answer: 68

Step-by-step explanation:

Formula for sample size when prior estimate of population proportion (p) is available: $n=p(1-p)(\dfrac{z^*}{E})^2$

, where z*= critical-value.

E= Margin of error.

Let p be the population proportion of trees are infected with the citrus red mite.

As per given , we have

$p=\dfrac{1}{5}=0.2$

E= ± 0.08

The critical z-value corresponding to 90% confidence level = z*=1.645

Substitute all the values in the above formula , we get

Required sample size : $n=(0.2)(1-0.2)(\dfrac{(1.645)}{0.08})^2$

$\Rightarrow\ n=(0.2)(0.8)(20.5625)^2$

$\Rightarrow\ n=0.16(422.81640625)\\\\\Rightarrow\ n=67.650625\approx68$ [Rounded to next integer.]

Thus, the minimum sample size should be taken =68

6 0

3 years ago

Nicky is considering two different companies for textbook rentals. For

maks197457 [2]

Answer:

if youre answer has to be a whole number it would be 3 otherwise it would be x<4 ( so anything less than 4 )

Step-by-step explanation:

so because we are trying to find which company is less, we need to set up in inequality.

so first lets do company A

because 15 is our reoccuring fee, its going to be the coeifficient

so the equation would be

A - 15x + 20

now lets do company B

because it only 20 every month we dont need to have a constant which means the equation for B would be

B - 20x

so lets put it all together

15x + 20 > 20x ( remember our B side has to be less )

now lets solve it

20 > 5x

we know that if x = 4 then the two would be equal, which means our answer would have to be 3 months.

now always check your work.

15 (3) + 20 = 65

20(3) = 60

3 0

3 years ago

If the class contains 11 boys and 14 girls, what is the probability of calling on a girl?

Ronch [10]

Answer: P (girl) = 14 / 25

Concept:

Here, we need to know the idea of probability.

Probability is a measure of the likelihood of an event to occur.

If you are still confused, please refer to the attachment below for a graphical explanation.

Solve:

Number of boys = 11

Number of girls = 14

Total number of people = 11 + 14 = 25

P (girl) = Favorable / Total (refer to the attachment)

P (girl) = 14 / 25

Hope this helps!! :)

Please let me know if you have any questions

8 0

3 years ago