MATHEMATICS
MIDDLE SCHOOL

Answer: I do not understand what to do , more explicitly sorry :(

MIDDLE SCHOOL

Factor completely 20y2 +3y -2

Answer:

(4y+1) (5y-2)

Step-by-step explanation:

(4y+1)(5y-2) this is the right answer to thw question below

MIDDLE SCHOOL

What is the end behavior of the polynomial function

Even-degree polynomials behave like quadratics, while odd-degree polynomials behave like cubic graphs. If an even-degree polynomial has a positive leading coefficient, the two ends of the graph point upward. If an even-degree polynomial has a negative leading coefficient, the two ends of the graph point downward. If an odd-degree polynomial is positive, the left end points down and the right end points up. If an odd-degree polynomial has a positive leading coefficient, the left end points up and the right end points down.

MIDDLE SCHOOL

Which weight is equivalent to 80 pounds? 5 ounces

50 ounces

128 ounces

1,280 ounces

Answer:

80 pounds = 1280 ounces

Option D is the correct answer.

Step-by-step explanation:

We need to find weight equivalent to 80 pounds.

We have conversion

1 pound = 16 ounces.

Using the above conversion we will get

80 pounds = 16 x 80 ounces

80 pounds = 1280 ounces

Option D is the correct answer.

The answer is D 1,280 ounces.

1 pd = 16 oz so 16 x 80= 1,280.

Have a nice day :-)

1 pd = 16 oz so 16 x 80= 1,280.

Have a nice day :-)

HIGH SCHOOL

A small software company has two customer service representatives. After a week of observation, the supervisor of the customer service department determines that there is an 85% probability that a customer service representative will be on the phone with a customer at any given time. What is the probability of both representatives being on the phone at the same time? Round to the nearest percent if necessary.

The probability of both representatives being on the phone at the same time is 72%.

What is probability?It is the chance of an event to occur from a total number of outcomes.

The formula for probability is given as:

Probability = Number of required events / Total number of outcomes.

We have,

There is an 85% probability that a customer service representative will be on the phone with a customer at any given time.

This means,

P(First customer) = 85/100 = 0.85

Now,

P(Second customer) = 85/100 = 0.85

Now,

The probability of both representatives being on the phone at the same time.

= 0.85 x 0.85

= 0.7225

= 0.7225 x 100

= 72.25%

Thus,

The probability is 72%.

Learn more about probability here:

brainly.com/question/14099682

#SPJ2

Answer:17/20)^3

=0.85^3 and that is 0.614 and it is equal to 61%

Step-by-step explanation:

COLLEGE

Last year, a person wrote 128 checks. Let the random variable x represent the number of checks he wrote in one day, and assume that it has a Poisson distribution. What is the mean number of checks written per day? What is the standard deviation? What is the variance?

Answer: The mean number of checks written per day =

Step-by-step explanation:

Given : A person wrote 128 checks in last year.

Consider , the last year is a no-leap year.

The number of days in ;last year = 365 days

Let X be the number of checks in one day.

Then ,

The mean number of checks written per day =

Now X follows Poisson distribution with parameter .

Then ,

HIGH SCHOOL

What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with 4f(x)? A) same slope, same y-intercept

B) same slope, different y-intercept

C) different slope, same y-intercept

D) different slope, different y-intercept

Remark

The way this is written I would assume that it means 4*f(x) = x. That may not be entirely the correct assumption to be made.

Step One

Replace f(x) by 4f(x)

4*f(x) = x

Step two

Divide both steps by 4

f(x) = x/4 or (1/4)x

The slope is now 1/4

Discussion

A is incorrect.

The slope has been changed.

B is incorrect

The slope has been changed to 1/4 and the y intercept is still 0

C looks to be the right answer.

D The y intercept is still zero.

Comment

The question is a little hard to interpret. I've read it literally. That means that I have taken the question to mean that only f(x) was altered. If however, the right side was multiplied by 4 as well (as should be done), then the answer is A same slope same intercept. That's because the 4s on the left and right cancel, and the original equation results. I'm going to pick C but don't be surprised if it is A

C

The way this is written I would assume that it means 4*f(x) = x. That may not be entirely the correct assumption to be made.

Step One

Replace f(x) by 4f(x)

4*f(x) = x

Step two

Divide both steps by 4

f(x) = x/4 or (1/4)x

The slope is now 1/4

Discussion

A is incorrect.

The slope has been changed.

B is incorrect

The slope has been changed to 1/4 and the y intercept is still 0

C looks to be the right answer.

D The y intercept is still zero.

Comment

The question is a little hard to interpret. I've read it literally. That means that I have taken the question to mean that only f(x) was altered. If however, the right side was multiplied by 4 as well (as should be done), then the answer is A same slope same intercept. That's because the 4s on the left and right cancel, and the original equation results. I'm going to pick C but don't be surprised if it is A

C

Answer:

The answer is in C)

Step-by-step explanation:

I took this test already

MIDDLE SCHOOL

In which form is the following function written?

y=-2x^2+5x-1

Answer:

Standard Form

Step-by-step explanation:

we know that

A quadratic function written in standard form is

in this problem we have

so

MIDDLE SCHOOL

Round 38.49 to the nearest whole number

38. The nearest whole number to 38.49 is 38 because at .5 you begin rounding up to the nearest whole number.

MIDDLE SCHOOL

Plan drawn on a scale 1:40 . and room measures 4.5 inches what is actually size?

We know that

scale factor=1/40

scale factor= length on the map/ Actual length

if length on the map=4.5 in

Actual length= length on the map/scale factor

Actual length= 4.5/(1/40)----> 4.5*40----> 180 in

convert to feet

1 ft---------> 12 in

180 in---------> 180/12-------> 15 ft

the answer is

the actual size of the room is 15 ft (180 in)

scale factor=1/40

scale factor= length on the map/ Actual length

if length on the map=4.5 in

Actual length= length on the map/scale factor

Actual length= 4.5/(1/40)----> 4.5*40----> 180 in

convert to feet

1 ft---------> 12 in

180 in---------> 180/12-------> 15 ft

the answer is

the actual size of the room is 15 ft (180 in)