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Vikki [24]
3 years ago
8

8th grade math please help! 8-10 points

Mathematics
2 answers:
Alisiya [41]3 years ago
8 0
The third one, this is because you take your y2 and y1 values (y2=0 and y1=9 because these are the two y values given to you from each coordinate) and subtract 0-9. then you do the same, but with the x2 and x1 values. so your x1 value is 3 and your x2 value is 0, so you subtract 0 from 3. divide your second answer from the first answer, to get a gradient of -1/3 x. now using the first coordinate (0,9) you know that the y coordinate is 9. as the x value =0, we know that the line is passing through the y axis at 9 so 9 is your y intercept. this gives you the equation -1/3x+9. hope this helped and wasn't too confusing!
vekshin13 years ago
3 0
So the first question
cost =y
estimated cost=cost of toy+cost of batteries
so
y=12+0.75x or y=0.75x+12 or the third choice

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a hotel with 75 rooms has 45 for doubles and 30 singles. singles can be booked in any room, but reservations for two or more peo
Hatshy [7]

Answer:

y = 75 - x

Step-by-step explanation:

From the question, we are given variables, and then we can see that

when x = 75 then y = 0

when x = 30 then y = 45

Finding the difference, we have

slope(m) = (45 - 0) / (30 - 75)

slope(m) = 45 / -45

slope(m) = -1

Next, we use the calculated m, to find b, using the formula

y = mx + b

0 = -1 * 75 + b

0 = -75 + b

b = 75

And finally, to get the needed equation, we say that

so y = mX+c

So that

y = -1 * x + 75

y = -x + 75

or y = 75 - x

6 0
3 years ago
Giving 21 points for answer!! Please help!!
nordsb [41]

Answer:

The bottom question is wrong. You have to multiply 8 to get the amount earned. But the rest is correct.

Step-by-step explanation:

6.25 x 8 = 50

12.5 x 8 = 100

18.75 x 8 = 150

25 x 8 = 200

31.25 x 8 = 250

5 0
3 years ago
Read 2 more answers
What are the opposites of 3, 7.5 and -2 2/3?
kirill115 [55]
-3,-7.5,2 2/3 are the opposites of those numbers
5 0
3 years ago
A number is randomly picked from this list: 10, 20, 30, 40, 50. what is the probability of picking an even number
ivanzaharov [21]
Hey there! :)

There are 5 numbers.

Even numbers end with 2, 4, 6, 8, or 0

All of the numbers end in 0

That means all the numbers are even

Your answer is: 5/5 = 1

Hope this helps :)
7 0
4 years ago
2ci 1=-d 6-ci solve for c and d
Otrada [13]
Imaginary numbers ? just equate the imaginary with imaginary and real with real

<span>2ci 1=-d 6-ci <<< what the * is that ?

</span><span>
</span>
5 0
3 years ago
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