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3 years ago

If a number has an absolute value equal to –23, that number could be

2 answers:

4 0

The absolute value of -23 is 23. Absolute value is always positive so when you have a negative number such as your example, the absolute value is just the positive form of the negative number.

solmaris [256]3 years ago

3 0

Hello,

Impossible, a absolue value is always positive.

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Amanda only has $30 to buy pens and notebooks. Each pen costs $2. Each notebook coats $3. Which of the following graph represent

sineoko [7]

Answer:

3p + 8n, 12p + 2n, 9p+4n, 6p+6n

8 columns bar graph.

Step-by-step explanation:

$2 = pen

$3 = notebook

This could be written as a bar graph in multiples of $6.00 along y axes.

3 pens + 8 notebooks. Then 12 pens + 2 notebooks.

Then 9 pens + 4 notebooks . Then 6 pens + 6 notebooks

3p + 8n, 12p + 2n, 9p+4n, 6p + 6n

3p = $6

8n = $24

12p = $24

2n = $6

9p = $18

4n = $12

6p = $12

6n = $18

and so on...

4 0

3 years ago

A software developer wants to know how many new computer games people buy each year. Assume a previous study found the standard

Marrrta [24]

Answer:

The minimum sample size required to ensure that the estimate has an error of at most 0.14 at the 95% level of confidence is n=567.

Step-by-step explanation:

We have to calculate the minimum sample size n needed to have a margin of error below 0.14.

The critical value of z for a 95% confidence interval is z=1.96.

To do that, we use the margin of error formula in function of n:

$MOE=\dfrac{z\cdot \sigma}{\sqrt{n}}\\\\\\n=\left(\dfrac{z\cdot \sigma}{MOE}\right)^2=\left(\dfrac{1.96\cdot 1.7}{0.14}\right)^2=(23.8)^2=566.42\approx 567$

The minimum sample size to have this margin of error is n = 567.

3 0

3 years ago

It is believed that 11% of all Americans are left-handed. In a random sample of 100 students from a particular college with 1012

tia_tia [17]

Answer:

Step-by-step explanation:

We can calculate this confidence interval using the population proportion calculation. To do this we must find p' and q'

Where p' = 14/100= 0.14 (no of left handed sample promotion)

q' = 1-p' = 1-0.14= 0.86

Since the requested confidence level is CL = 0.98, then α = 1 – CL = 1 – 0.98 = 0.02/2= 0.01, z (0.01) = 2.326

Using p' - z alpha √(p'q'/n) for the lower interval - 0.14-2.326√(0.14*0.86/100)

= -2.186√0.00325

= -2.186*0.057

= 12.46%

Using p' + z alpha √(p'q'/n)

0.14+2.326√(0.14*0.86/100)

= 0.466*0.057

= 26.5%

Thus we estimate with 98% confidence that between 12% and 27% of all Americans are left handed.

6 0

3 years ago

I need help ASAP please (transforming functions)

Yuki888 [10]

Answer:

okay look at it this way:

Step-by-step explanation:

when you use a mirror and you look at the shape on both sides then you will see the -x which is basically on the same side but just a minus instead. Soo let's say you have to graph a coordinate of (2,4) y=2 and x=4 si you have to graph the normal plots and when you put it in the opposite sides the thing you only did was you just made a reflection of the shape just negative instead. hope you understand what I'm saying.

(reflective)

7 0

3 years ago

Read 2 more answers

The function f is given in three equivalent forms. Which form most quickly reveals the vertex? A.f(x)=3(x+6)2−75 B.f(x)=3(x+1)(x

mrs_skeptik [129]

Answer:

A. f(x)=3(x+6)^2-75

vertex form is (-6,-75)

Step-by-step explanation:

Khan Academy Quiz #5

7 0

3 years ago

Read 2 more answers