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2 years ago

1. There are 4 boys for every 5 girls in the sixth grade.

Mathematics

1 answer:

dexar [7]2 years ago

8 0

Answer:

Equivalent

Step-by-step explanation:

4/5=12/15

4*15=12*4( cross multipication)

60=60

PROVED

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Based on historical data, your manager believes that 40% of the company's orders come from first-time customers. A random sample

Vedmedyk [2.9K]

Answer:

$P(0.26 \leq p \leq 0.43)=0.7204-0.0032=0.7172$

Step-by-step explanation:

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

The population proportion have the following distribution

$p \sim N(p=0.4,\sqrt{\frac{p(1-p)}{n}}=\sqrt{\frac{0.4(1-0.4)}{91}}=0.0514)$

And we can solve the problem using the z score on this case given by:

$z=\frac{p_o -p}{\sqrt{\frac{p(1-p)}{n}}}$

We are interested on this probability:

$P(0.26 \leq p \leq 0.43)$

And we can use the z score formula, and we got this:

$P(\frac{0.26 -0.4}{\sqrt{\frac{0.4(1-0.4)}{91}}} \leq Z \leq \frac{0.43 -0.4}{\sqrt{\frac{0.4(1-0.4)}{91}}})$

$P(-2.726 \leq Z \leq 0.584)$

And we can find this probability like this:

$P(-2.726 \leq Z \leq 0.584)=P(Z$

7 0

2 years ago

How many meatballs do frank need to make if there are 20 adults and 8 children the equation is m=4a+2c

MAVERICK [17]

The equation is 4 meatballs for every adult and 3 for every child. Replace a and c and solve:

M = 4(20) + 2(8)

M = 80 + 16

M = 96

They need 96 meatballs.

3 0

3 years ago

20pts<br> how do you solve 3x-2y=14?

Furkat [3]

X(3) - Y(2) = 14. So you need numbers that will multiply by 3 and a number that multiply by 2 that will equal 14.
The x can be 10 (equals 30) and then y can be 8 (equals 16).
30 subtracted by 16 equals 14.

ANSWER:

X = 10 Y = 16
3(10) - 2(8) = 14

Hope this helped. Have a great day. A thank you and (or) brainliest is always appreciated. Goodbye!

4 0

3 years ago

What is the square root of 49/900

Radda [10]

0.00777777777 I think

6 0

3 years ago

PLEASE HELP! Which graph corresponds to the function<br> f(x) = (x-2)/(x-3)(x-1)

grigory [225]

Answer:

Step-by-step explanation:

Graphing calculator

3 0

2 years ago