Simplify the expression that you wrote in part D, and explain what the number means with regard to the problem.

Mathematics

2 answers:

klasskru [66]3 years ago

8 0

Answer:

When two negatives are put together, it makes a positive. Something subtracted by a negative number, will then have that negative number added to it.

Step-by-step explanation: hope it helps! i know its late but other people can use the answer. <3

Aleonysh [2.5K]3 years ago

4 0

Answer:

12.3 + 9.6 = 21.9

The number 21.9 means Vivian's elevation increased by 21.9 feet as she rode the Ferris wheel from the bottom to the top.

Step-by-step explanation:

You might be interested in

Find the two numbers the quotient is between. Then estimate the quotient. 75 divided by 4

Liula [17]

Answer:

The quotient will be between 18 and 19.

Estimated quotient will be 18.75

Step-by-step explanation:

The closest number to 75 which is divisible by 4 and less than 75 is : 72 and

the closest number to 75 which is divisible by 4 and greater than 75 is : 76

Now, $72 \div 4= 18$ and $76\div 4= 19$

That means, the quotient for $(75\div4)$ will be between 18 and 19.

As, 75 is 1 less than 76, so the quotient will be $\frac{1}{4}$ or $0.25$ less than 19.

So, the quotient will be: $19-0.25= 18.75$

4 0

4 years ago

You want know if self-checkout is faster than regular checkout. One hundred customers were sent to

Kazeer [188]

A researcher's design of an experiment is to make clearer already known

facts, or to discover new knowledge.

The responses are:

Experimental units: The customers

Explanatory variable: The type of checkout used

Treatments: The checkout to which a customer is sent to

Response variable: The time it takes to check out

Reasons:

The aim of the experiment is to determine if self-check out is faster than

regular checkout.

The number of customers sent to one of the checkout options = 100

The experimental units are the subject of the experimental treatment.

Therefore;

The experimental units are the customers that are sent to a particular checkout.

An explanatory variable is the manipulated variable in an experiment. An explanatory variable is known as an independent variable.

In the question, the explanatory variable are the type of checkout; Self-checkout or regular checkout

Treatments are the levels of the explanatory variable available in the experiment, or a combination of the levels. The treatment is what the experimental units are subjected to.