Solve: x + 1 < 4 and 3

What is the value of the expression (-3/8) (2/5)? Write your answer as a fraction in simplest. form.

Alona [7]

Answer:

-3/ 20

Step-by-step explanation:

-3/8 * 2/5

Rewriting

-3/5 * 2/8

Simplify the right term by dividing the top and bottom by 2

-3/5 * 1/4

Multiply the numerators and then the denominators

-3/ 20

7 0

3 years ago

Read 2 more answers

What is the birthday polynomial for 10/1/2006

zubka84 [21]

Answer:

Simplified version: 10x^5 - 1x^4 + 2x^3 - 6

Step-by-step explanation:

Since your birthday is 10/1/2006 we can use 1012006 as our digits.

We can make a random polynomial: 10x^5 - 1x^4 + 2x^3 + 0 x^2 + 0x - 6

(since 0 are meaningless we can simply this further into the below equation)

10x^5 - 1x^4 + 2x^3 - 6

Here's an example: https://www.wyzant.com/resources/answers/730225/birthday-polynomial-project-for-04-15-2004

8 0

2 years ago

How can you determine if a function is exponential or not without graphing?

ddd [48]

You are looking for several things when determining if a function is exponential or not.

An exponential function needs three things. A base, a power which is always a variable, and a constant.

Let me write a random exponential function and I’ll use it as an example.

f(x)=100x1.05^x

This is an exponential function because the c (constant) is 100. The c usually is about a population or object that is increasing.

The base is 1.05 which is usually a percentage increase.

Then the power which is x and this controls the time. It could be per day, year, and etc.

All of these factors contribute to the exponential function. If you have any questions ask, don’t be shy. :)

6 0

3 years ago

The article "Occurrence and Distribution of Ammonium in Iowa Groundwater" (K. Schilling, Water Environment Research, 2002:177–18

Papessa [141]

Answer: 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

Step-by-step explanation:

Since we have given that

Number of alluvial wells = 349

Number of quaternary wells = 143

Number of alluvial wells that had concentrations above 0.1 = 182

Number of quaternary wells that had concentrations above 0.1 = 112

Average of alluvial wells = 0.27

Standard deviation = 0.4

Average of quaternary wells = 1.62

Standard deviation =1.70

So, 95% confidence interval gives

alpha = 5% level of significance.

$\dfrac{\alpha}{2}=2.5\%\\\\z_{\frac{\alpha}{2}}=1.96$

So, 95% confidence interval becomes,

$(1.62-0.27)\pm 1.96\sqrt{\dfrac{0.4^2}{349}+\dfrac{1.7^2}{143}}\\\\=1.35\pm 1.96\times 0.020\\\\=(1.35-0.040,1.35+0.040)\\\\=(1.31,1.39)$

Hence, 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

6 0

4 years ago

The director of a community recreation center conducted a six-week study to examine the effects of four types of exercise—streng

Olin [163]

Answer: The treatments in the study are strength training, flexibility training, aerobics, and jogging.

Step-by-step explanation:

A correct description of a feature of the study is that the treatments in the study are strength training, flexibility training, aerobics, and jogging.

It should be noted that the study has no replication. Also, the experimental units are the 40 members that participated.

Therefore, the correct option is D.

4 0

3 years ago

Solve: x + 1 < 4 and 3 - x > 5