Answer: Y=-3x+6
Step-by-step explanation:
First, you want to plug in the numbers you do know to the equation Y=mx+b
3 = -3(1) +B
Then multipy -3 x 1, and move it to the other side so it looks like:
3+3=B
Then format it without the X and Y plugged in so it would be
Y=-3x+6
area = base times height, or 8 cm times 4 cm, or 32 cm^2
The line is leaning to the left, so the slope is negative, eliminate A and D
when x is 3, y is -2, so C is the correct answer
Answer:
Let x and y be the two numbers. Then
yx=57 and x−y=20
Cross multiplying the proportion
5x=7y or y=75x
So, x−y=20
x−75x=20⇒77x−5x=72x=20
⇒x=2140=70
y=75x=75×70=50
So smaller number is 50.
Check :yx=5070=57 and 70−50=20
-x^2+2x+3=x^2-2x+3 add x^2 to both sides
2x+3=2x^2-2x+3 subtract 2x from both sides
3=2x^2-4x+3 subtract 3 from both sides
2x^2-4x=0 factor
2x(x-2)=0
So x=0 and 2
