Hey buddy I am here to help!
5. y = ax + b
-5 = a*4 + b
-5 = 4a + b
If we take a as -2
-5 = 4*-2 + b
-5 = -8 + b
b = -5 - (-8)
b = -5 + 8
b = 3
so... a = -2 and b = 3
6. (i) y = 5x - 2
(1,7)
y = 7 & x = 1
7 = 5*1 -2
7 = 5 - 2
7 = 3
so this point (1,7) is wrong
(ii) y = 5x -2
we can take any value for x...
e.g. x = 2
y = 5*2 - 2
y = 10 -2
y = 8
SO answer in this case would be (2,8)
Plz mark my answer brainliest
Hi there! :)
Answer:
We can disregard the units temporarily to create a ratio for 4.5 to 4:
4.5 is not a whole number- we can convert this number in the ratio to a whole number by multiplying both numbers by 2:
2 · (4.5 : 4) = 9 : 8
Express as a fraction:
When you have a system of equations like this, the solution will be a coordinate, so it will have an x point and a y point. To find the solution's x coordinate you first want to add the equations together.
x + 3y = 5
x - 3y = -1
x + x = 2x
3y - 3y = 0
5 + (-1) = 5 - 1 = 4
So now we have 2x = 4
Just solve for x in this simple one-step equation by dividing each side by 2 to isolate the variable.
2x / 2 = 4 / 2
x = 2
The x coordinate of the solution is 2.
Now, to find the y coordinate we will substitute our x value (2) into either of the original equations.
I'll choose x + 3y = 5
We now know that x = 2, so replace x with 2.
x + 3y = 5
2 + 3y = 5
3y + 2 = 5
(subtract 2 from each side)
3y + 2 - 2 = 5 - 2
3y = 3
(divide each side by 3)
3y / 3 = 3 / 3
y = 1.
So, we've found that the x coordinate of our solution is 2, and the y coordinate is 1/
The solution is (2, 1)
Hope this helps!!
Let me know if you need help understanding anything and I'll try to explain as best that I can.
After 12 months andrew will have paid 516$ because there are 12 months in a year and if you multiply 516 times 12 that what you get. dough will have paid 464$ because again there are 12 months in a year and he started with 104$ so if you multiply 30$ time 12 you get 360 and if you add 104$ to that you get 464$
P+6-s=r or
P-s+r=-6 or
P+r+6=s