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4 years ago

When using the order of operations, you should subtract and add from left to right. true/false?

Mathematics

2 answers:

Drupady [299]4 years ago

5 0

That would be true, yes

igomit [66]4 years ago

5 0

Yes, it is true. Adding and subtracting take place in the same step (depending on the problem, there might not be one or the other).

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At a local grocery store, bananas were on sale. Green bananas were priced at $14.00 and yellow bananas were priced at $12.00. Sa

garri49 [273]

Answer:

Sabrina bought 6 yellow bananas and 3 green bananas

Step-by-step explanation:

Let

Green bananas = x

Yellow bananas = y

Green bananas = $14.00

Yellow bananas = $12.00

Total cost = $114.00

x + y = 9 (1)

14x + 12y = 114 (2)

From (1)

x = 9 - y

Substitute x = 9 - y into (2)

14(9 - y) + 12y = 114

126 - 14y + 12y = 114

- 14y + 12y = 114 - 126

-2y = -12

Divide both sides by -2

y = -12 / -2

= 6

y = 6

Substitute y = 6 into (1)

x + y = 9

x + 6 = 9

x = 9 - 6

= 3

x = 3

Sabrina bought 6 yellow bananas and 3 green bananas

3 0

3 years ago

Find the x-intercept of the equation

notka56 [123]

I would say either A or B because -3+3=0 and 0+3=3

Hope this helps

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3 years ago

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Ann charges $7.50 for 3 hours of gardening. What is her hourly rate?

slamgirl [31]

Her hourly rate is $2.50

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3 years ago

PLEASE HELP WILL GIVE BRAINLIEST AND 100 POINTS

Agata [3.3K]

Answer:

answer down below:

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Step-by-step explanation:

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3 years ago

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Usually, in sports, we expect top athletes to get better over time. We expect future athletes to run faster, jump higher, throw

Slav-nsk [51]

The question is incomplete! Complete question along with answer and step by step explanation is provided below.

Question:

Usually, in sports, we expect top athletes to get better over time. We expect future athletes to run faster, jump higher, throw farther. One thing has remained remarkably constant, however. The percent of free throws made by basketball players has stayed almost exactly the same for 50 years.1 For college basketball players, the percent is about 69% , while for players in the NBA (National Basketball Association) it is about 75% . (The percent in each group is also very similar between male and female basketball players.) In each case below, find the mean and standard deviation of the distribution of sample proportions of free throws made if we take random samples of the given size.

(a) Samples of 250 free throw shots in college basketball

mean _________

standard error __________

(b) Samples of 1000 free throw shots in college basketball

mean _________

standard error __________

mean _________

standard error __________

(d) Samples of 1000 free throw shots in the NBA

mean _________

standard error __________

Answer:

(a)

mean = 0.69

standard error = 0.0292

(b)

mean = 0.69

standard error = 0.0146

(c)

mean = 0.75

standard error = 0.0274

(d)

mean = 0.75

standard error = 0.0137

Step-by-step explanation:

We are given that the proportion of free throw shots made by college basketball players is

$p = 0.69$

The proportion of free throw shots made by National Basketball Association players is

$p = 0.75$

The mean of the distribution of sample proportions will be same as population mean that is

$\mu_p = p$

The standard deviation of the distribution of sample proportions is given by

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

(a) Samples of 250 free throw shots in college basketball

Here we have n = 250 and p = 0.69

$\mu_p = p = 0.69$

$SD = \sqrt{\frac{p(1-p)}{n} }\\\\SD = \sqrt{\frac{0.69(1-0.69)}{250} }\\\\SD = 0.0292$

(b) Samples of 1000 free throw shots in college basketball

Here we have n = 1000 and p = 0.69

$\mu_p = p = 0.69$

$SD = \sqrt{\frac{p(1-p)}{n} }\\\\SD = \sqrt{\frac{0.69(1-0.69)}{1000} }\\\\SD = 0.0146$

(c) Samples of 250 free throw shots in the NBA

Here we have n = 250 and p = 0.75

$\mu_p = p = 0.75$

$SD = \sqrt{\frac{p(1-p)}{n} }\\\\SD = \sqrt{\frac{0.75(1-0.75)}{250} }\\\\SD = 0.0274$

(d) Samples of 1000 free throw shots in the NBA

Here we have n = 1000 and p = 0.75

$\mu_p = p = 0.75$

$SD = \sqrt{\frac{p(1-p)}{n} }\\\\SD = \sqrt{\frac{0.75(1-0.75)}{1000} }\\\\SD = 0.0137$

We can conclude that as the number of samples increases the standard deviation decreases.

6 0

3 years ago