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Andru [333]
3 years ago
9

Add the two expressions -4x + 3 and 2x - 6 enter your answer in the Box PLZ HELP FASt

Mathematics
1 answer:
Fed [463]3 years ago
3 0
-4x+3+2x-6
The answer is -2x-3
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What are the solutions of the equation x4+6x^2+5=0? Use substitution to solve
Nataly_w [17]

Answer:

+ or - square root of 5, and + or - i

Step-by-step explanation:

(x^2 + 5)(x^2 + 1)= 0

Set each set of parentheses equal to zero:

x^2 + 5 = 0; x^2 = -5, so x will equal plus or minus i times the square root of 5.

X^2 +1 = 0; x^2 = -1, so x will equal plus or minus i times the square root of one, which is just i

6 0
2 years ago
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1. Suppose on a sample of Montanans it is found the mean salary is equal to 30,000. When we use a statistic like this to simply
Kitty [74]

Answer:

1. Suppose on a sample of Montanans it is found the mean salary is equal to 30,000. When we use a statistic like this to simply describe a sample, this is an example of:

a) an inferential statistic

b) a descriptive statistic

c) a sample median

d) random sampling

e) b and c

2. If we collect observations on 100 people, and measure their IQ, the 100 observations is:

a) a sample

b) a population

c) a sample with likely no variability

d) a or b are possibilities, depending on the scope of the investigation

e) a variable

Suppose the trace of a matrix is equal to 10. If this matrix is also an identity matrix, how many rows must the matrix have?

10

equal to the number of columns of the matrix

0

a and b

impossible to say without further information

4. If it is universally known in general that all cats have four legs, then the conclusion that your particular cat has four legs is an example of:

inductive inference

deductive inference

statistical inference

d) a mathematical function

e) none of the above

5. Suppose you have values on variable equal to , and wish to compute a measure of variation from the mean. Without knowing what the exact values of the variable are, which of the following measures will necessarily generate a positive number (which is of course different from zero) regardless of the values for ?

a) the sum of absolute deviations from the mean

b) the sum of deviations from the mean

c) the sum of squared deviations from the mean

d) the standard deviation

e) a and c

f) none of the above

6. One common interpretation of the derivative in mathematics is:

a quadratic function

an instantaneous rate of change

the limit of a linear function

none of the above

7. Consider the numbers 1, 2, 3, 4 assigned to values of a variable. The variable being measured is most likely:

a) quantitative

b) qualitative

c) one for which computing the standard deviation would likely be appropriate

d) one for which computing the median would definitely be inappropriate

e) a and c

8. Integration in calculus is generally used for:

computing the rate of change of one variable with respect to another

computing areas under curves

computing areas in rectangles only

none of the above

9. If the mean of some data set is equal to 10, then this necessarily implies:

a) 1/2 of the scores fall above and below the mean of 10

b) the score of 10 must exist in the actual data set of recorded values

c) the variance of the data is probably negative

d) the standard deviation cannot be greater than 10

e) the distribution is normal

f) none of the above

10. If you compute the arithmetic mean, the sum of deviations of scores from that mean are always equal to:

a) 1

b) 0

c) 0 or a positive number

d) a squared number

e) none of the above

4 0
3 years ago
66 points! for if you get this right 99 kids go race go karts for a all day pass is $56 per kid then they play arcade games at a
Romashka-Z-Leto [24]

The total amount that was spent is $6099

<h3>How to determine the total amount that was spent?</h3>

The given parameters are

Number of kids = 99

Pass = $56 per kid

Arcade game = $555

The total amount that was spent is calculated as

Total = Number of kids * Pass + Arcade game

So, we have

Total = 99 * 56 + 555

Evaluate the expression

Total = 6099

Hence, the total amount that was spent is $6099

Read more about expressions at

brainly.com/question/723406

#SPJ1

7 0
1 year ago
Suppose you deposit $12.50 into your savings account each week for 4 weeks and then withdraw $4.80 each week for the next two we
monitta

Answer:

The total change in the amount of money in my account is $ 9.60

Step-by-step explanation:

Given:

Amount of money deposited each week, A_{d}=\$12.50

Amount of money withdrawn each week, A_{w}=\$4.80

∴ Amount of money deposited in 4 weeks, A_{dT}=A_{d}\times 4=12.50\times 4 = \$50

∴ Amount of money withdrawn in 2 weeks, A_{wT}=A_{w}\times 4=4.80\times 2 = \$9.6

Now, amount of money left in the account is the difference of the two amounts.

So, amount left = A_{dT}-A_{wT}=50-9.6=\$40.4

Therefore, the total change in the amount of money in my account is given as:

Total change = Initial amount after 4 weeks - Final amount in the account.

Total change = $ 50 - $40.4 = $ 9.6

7 0
3 years ago
Does anyone know how to unit rate?
Westkost [7]

Answer:17.91 calories per minute

Step-by-step explanation:

412 calories burned

23 minutes of riding

412/23 = 17.91 calories per minute

3 0
3 years ago
Read 2 more answers
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