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2 years ago

17 points! Please help!

Mathematics

2 answers:

Amanda [17]2 years ago

8 0

A sample was collected to gather information among a small group to see any shared traits/etc among the group that is repetitively seen. That sample can create a strong prediction about any other group of bluejays, so instead of collecting basically a large chunk of information from bluejays, a small group can summarize the entirety of the blue jays

Nostrana [21]2 years ago

3 0

If you take more than just a sample you can accidentally change something in the results because you took to much<span />

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Help please i need to pass

stellarik [79]

Answer:

hi! i dont have the answer because i suck at school lol XD but, i actually have the same question! do you know the answer yet?:] sorry to bother you if you dont.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

A’s DJ service charges a $200 setup fee and $75 an hour after that.

Bogdan [553]

The total cost includes the setup cost + per hour cost.

Let, x represents the time and y represents the total cost.

$y=200+75x$ .... (1)

Let Y represent the cost for B's DJ service.

$y=125x$ .... (2)

a. Graphing both the equations give the intersection point (solution) as (4,500)

It means for 4 hours, the total cost of both the DJ's is same at $500.

b. Substitution Method.

Plug y = 125x in equation (1)

$125x= 200+75x$

$125x-75x=200$

$50x=200$

$x=4$

$y=125\times 4 =500$

Hence, the total cost for 4 hours in both the service is $500.

c. Addition method.

Multiply equation (2) by -1

$-y = -125x$ .... Equation (3).

Add euation (1) and equation (3)

$y+(-y) = 200+75x-125x$

$0=200-50x$

$50x=200, x=4$

$y=500$

Solution: For x = 4, y = 500 ( same as the previous two methods)

For x = 2, equation (1)

$y=200+(75\times 2) = 350$

For x = 2, equation (2)

$y= 125\times 2 =250$

Hence, for 2 hours, DJ B would be a better choice since it would charge $250.

For x = 6 hours, equation (1)

$y=200+(75\times 6) =650$

For x= 6, equation (2)

$y=125\times 6=750$

For 6 hours, DJ A would be better option since it charges $650 for 6 hours.

8 0

2 years ago

What is the equation in point slope form of a line that passes through the point (−8, 2) and has a slope of 12 ? Drag a number,

NemiM [27]

Point-slope form:

y − b = m(x − a<span>), where m is the slope and (a, b) is a point on the graph.

Here that would look like:

y - 2 = 12(x - (-8))
y - 2 = 12(x + 8)

The answer:
</span>y - 2 = 12(x + 8)

Hope this helps.

5 0

3 years ago

Which of the following describes the algebraic expression 5(x+2)-3

Pavel [41]

5X+7 is the correct answer

3 0

2 years ago

Help i dont understand pls help :(

vazorg [7]

Answer:

B. -2

Step-by-step explanation:

All you have to do is look at 2 on the x axis and see where it lines up on the graph with the y axis. In this case, when you trace the line of 2 it matches up with -2 on the graph.

6 0

2 years ago