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frutty [35]
3 years ago
10

How do you graph Y=-5x+15

Mathematics
1 answer:
Alenkasestr [34]3 years ago
3 0
You plot the first point on the y-axis at 15 units up. Then you follow the direction of the slope.

The slope is: -5/1

So from your first point on the y-axis, go down 5 units and to the right 1 unit. Do this multiple times after you plot your new point. After this you may draw a line with an arrow to connect the dots.
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What is the absolute value of 2|x+5|-3=7
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Answer:

Step-by-step explanation:

x= -5 or x=2

that's what i think it is.

4 0
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Someone help with this one please.
kodGreya [7K]

The think the answer for number 7 is A/10

Number 8 is C/16

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Expression <br> (27)x/3 equivalent
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8 0
3 years ago
I have 10 goats, n of which are male. I need to choose 2 of them to make a casserole.
snow_tiger [21]

Answer: There are 4 male goats.

Step-by-step explanation:

We know that n of the 10 goats are male.

The probability that in a random selection, the selected goat is a male, is equal to the quotient between the number of male goats (n) and the total number of goats (10)

The probability is;

p = n/10

Now the total number of goats is 9, and the number of male goats is n -1

then the probability of selecting a male goat again is:

q = (n-1)/9

The joint probability (the probability that the two selected goats are male) is equal to the product of the individual probabilities, this is

P = p*q = (n/10)*((n-1)/9)

And we know that this probability is equal to 2/15

Then we have:

(n/10)*((n-1)/9) = 2/15

(n*(n-1))/90 = 2/15

n*(n-1) = 90*2/15 = 12

n^2 - n = 12

n^2 - n - 12  = 0

This is a quadratic equation, we can find the solutions if we use Bhaskara's formula:

For an equation:

a*x^2  + b*x + c =  0

The two solutions are given by:

x = \frac{-b +- \sqrt{b^2 - 4*a*c} }{2*a}

For our case, the solutions will be:

n = \frac{1 +- \sqrt{(-1)^2 - 4*1*(-12)} }{2*1 } = \frac{1+- 7}{2}

The two solutions are:

n = (1 - 7)/2 = -3    (this solution does not make sense, we can not have a negative number of goats)

The other solution is:

n = (1 + 7)/2 = 4

This solution does make sense, this means that we have 4 male goats.

5 0
3 years ago
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