Answer:
D. 1.37, -1.37
Step-by-step explanation:
9x² = 17
x² = (17 / 9)
x = ± √(17 / 9)
x = ± (√17) / 3
x = 1.37, - 1.37
x = amount of the first alloy
y = amount of the second alloy
we know the first alloy is 25% copper, so then there is (25/100) * x of copper in it, namely 0.25x.
likewise, we know the second alloy is 75% copper so then there is (75/100) * y of copper or 0.75y.
he needs a 60 kgs mixture that 65% copper, or (65/100) * 60 = 39.


<span>17=-b+10
Subtract 10 from both sides
7= -b
Divide both sides by -1
Final Answer: -7= b</span>
Answer:
Step-by-step explanation:
The graph has plotted points. The (x) is how far you go left or right on the x axis from zero. The (y) is how far up or down you go on the y axis. Each plotted point has an address. (3,-1). This point is 3 to the right of zero and one down.
Answer:

Step-by-step explanation:
3(x - 4) = 11x
Expand the brackets:
3x - 12 = 11x
Subtract 3x from both sides to isolate the -12:
3x - 12 = 11x
3x - 3x - 12 = 11x - 3x
-12 = 8x
8x = -12
Divide both sides by 8:

Simplify fraction:


Hope this helps!