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Lisa [10]
3 years ago
8

The mean age of 5 people in a room is 40 years. A person enters the room. The mean age is now 39. What is the age of the person

who entered the room?
Mathematics
1 answer:
IrinaVladis [17]3 years ago
6 0

Answer:

10 years old :)

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3. Crystal has decided to drive her new car on the west coast from California to Washington, which is about 930
antoniya [11.8K]

Answer:

The correct option is the first graph (Yes)

Step-by-step explanation:

The given function is W(d) = 930/d

Where;

W(d) = The number of days it would take to get to Washington

d = The distance travelled each day in miles

We note that the given graphs have number of days in the y-axis and the miles in the x-axis, and that in the function, the distance Crystal travels each day is constant, <em>d</em>, while the 930 is the total distance from California to Washington, while W(d) is the time

Therefore, the variables for crystal are W(d) and the part of 930 miles completed, while the constant is the speed, d = miles/day, which gives;

W(d) = 930/d

W(d) ∝ Part of 930 miles completed × Constant

∴ W(d) which is the time is directly proportional to the distance

The graph which represents the number of days, W(d) it will take Crystal to get to Washington (miles completed) as a function of distance traveled per day, <em>d</em>, which is constant is a straight line graph which is the first graph

7 0
3 years ago
Are the equations sometimes, always, or never true?
AURORKA [14]
15 + 2x - 4 = 9x + 11 - 7x
2x + 11 = 2x + 11
always true

2x + 3(4x - 1) = 2(5x + 3) + 4x
2x + 12x - 3 = 10x + 6 + 4x
14x - 3 = 14x + 6
never true
4 0
3 years ago
4-2 1/4 <br> as a fraction !!!<br> ill mark !!<br> have a good day !!
noname [10]

Answer:

3/4

Step-by-step explanation:

it's for sure 3/4!!!!!

7 0
3 years ago
Simplify −2xy + 3x − 2xy + 3x and can you explain the answer?
irina1246 [14]

Answer:

 -4xy+6x

Step-by-step explanation:

Given : Expression =  -2xy+3x-2xy+3x

Simplifying the expression :

Step 1. Write the expression =   -2xy+3x-2xy+3x

Step 2.  Add the similar elements:  3x+3x=6x

          =  -2xy-2xy+6x

Step 3. Add the similar elements:  -2xy-2xy=-4xy

           = -4xy+6x

Therefore, -4xy+6x is the simplified form of  -2xy+3x-2xy+3x

8 0
3 years ago
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In the diagram, point o is the center of the circle
OLEGan [10]

Answer:

<em>There</em><em> </em><em>is</em><em> </em><em>no</em><em> </em><em>atta</em><em>chment</em><em> </em><em>showing</em><em> </em><em>a</em><em> </em><em>diag</em><em>ram</em><em>,</em><em> </em><em>so</em><em> </em><em>the</em><em> </em><em>answer</em><em> </em><em>to</em><em> </em><em>you</em><em>r question</em><em> is</em><em> </em><em>unk</em><em>nown</em><em>.</em>

4 0
4 years ago
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