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Olenka [21]
3 years ago
14

A math class is having a discussion on how to determine if the expressions 4 x minus x + 5 and 8 minus 3 x minus 3 are equivalen

t using substitution. The class has suggested four different methods. Which describes the correct method?
Mathematics
2 answers:
irga5000 [103]3 years ago
4 0

Answer: blueface baby

Step-by-step explanation:

kondor19780726 [428]3 years ago
3 0

Answer:

Both expressions should be evaluated with one value. If the final values of the expressions are the same, then the two expressions must be equivalent.  

Step-by-step explanation:

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Can i please have help with number 6
Allisa [31]
Length of the diameter =   sqrt ( (-12- (-8)^2) +(2-0)^2) )
  = sqrt  (16 + 4) = sqrt20 
so radius = sqrt 20 / 2 = sqrt5
so r^2 = 5


Center of the circle = coordinates of the midpoint of the diameter =

-8-12/2 , 2-0 / 2  =    (-10, 1)

(x - a)^2 + (y - b)^2 = r^2  is general form of a circle so here the circle is:_

(x + 10)^2 + (y - 1)^2 = 5  Answer

Its B
7 0
3 years ago
I HAVE 10 MIN LEFT CAN SOMEONE HELP ME WITH A FEW OF THESE OR ALL OF EM?
FinnZ [79.3K]
I will help you but I need to know what you need help with , find the area or volume?
4 0
2 years ago
Tamara and Amir shared a candy bar. Tamara ate two fifths. Amir ate two fifths. How much is left?
marin [14]

Answer:

1/5

Step-by-step explanation:

Both Amir and Tamara ate 2/5 each.

2/5 + 2/5 = 4/5

If 4/5 of the candy bar was eaten, 1/5 of the candy bar remains because

5/5 - 4/5 = 1/5

(Remember that 5/5 just equals one whole, representing the whole candy bar)

7 0
3 years ago
grandpa joe wants to open an account for his grandchildren that he hopes will have $80,000 in it after 20 years. how much must h
kirill [66]

Answer:

$46185.04

Step-by-step explanation:

80000 = X(1 + 0.0275/12)^(20×12)

X = 46185.03749

3 0
3 years ago
(NEED HELP ASAP)Determine whether the situation calls for a survey, an observational study, or an experiment. You want to find n
vladimir2022 [97]

Answer: The answer is "experiment."

Step-by-step explanation:

This procedure is being used in order to validate a hypothesis, particularly in a research study. In the situation above, you have to validate whether a new reading program can increase reading comprehension or not.

The experiment consists of independent, dependent, and controlled variables. The independent variables are the ones being changed by the researcher, while the dependent variables tell whether the changes in the independent variable is significant. The controlled variables are the ones that are constant.

The dependent variable above is reading comprehension, while the new reading program is the independent variable. Examples of controlled variables are the ages of the participants. The age directly affects the reading comprehension, thus it has to be considered.

8 0
3 years ago
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