4 years ago

The solution to #68 and #70

1 answer:

8 0

The trick is to write appropriate equations and then solve the system of equations you've created.

"sum of two numbers is -5:" x + y = -5

"difference is -1:" x-y = -1

Add these two equations together. This will cause y to drop out, and you will be left with an equation in x alone:

2x = - 6, so x = -3. Subst. -3 for x in either equation, above, and find the corresponding y value.

Then write your solution as (-3, y ) (write in your value for y).

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A student writes the equation for a line that has a slope

levacccp [35]

Y = mx + c
Where
y is the y of (2, -8)
x is the x of (2, -8)
m is the gradient or slope
c is the y intercept (you don’t know what it is)

Put into equation and find c

Once find c rewrite the equation with only the m and c in numbers

Eg

y = 5x + 3 (this is an example not the answer)

Hope this is helpful if you don’t understand please comment

7 0

2 years ago

Read 2 more answers

If a is the mean and b is the median of nine consecutive integers, what is the value of |a - bl?

pshichka [43]

Answer:

It would be zero.

Step-by-step explanation:

Let's for example look at this list : 123456789

The mean is 5, and the median would also be 5.

6 0

3 years ago