First, let's put the second equation, <span>x-2.23y+10.34=0, in terms of y:
x - 2.23y +10.34 = 0
2.23y = x + 10.34
y = .45x + 4.64
Now we can substitute the right side of this equation for y in the first equation
</span><span>y=2x^2+8x
.45x + 4.64 = 2x^2 + 8x
Turn it into a quadratic by getting 0 on one side:
2x^2 + 8x - .45x - 4.64 = 0
2x^2 + 7.55x - 4.64 = 0 Divide both sides by 2
x^2 + 3.76x - 2.32 = 0
x =( -b +/- </span>√(b² - 4ac) ) / 2a
x =( -3.76 +/- √(14.14 + 9.28)) ÷ 2
x = .54 or -4.31
Plug the x values into y = .45x + 4.64
y = .45 (.54) + 4.64
y = 4.88 when x= .54
y = .45 (-4.31) + 4.64
y = 2.70 when x= -4.31
Solution set:
{ (0.54, 4.88) , (-4.31, 2.70) }
Whats her hourly wage and where is the rest of the question this is very confusing there are no details so i cannot help you sorry
Answer:
Brainless bruv I gonna say that's a insult but ok
Answer:
10) 2/3 > 0.6
11) 7% < 7/10
12) 6.5 = 650%
13) 38%, 0.4, 5/8
14) 1/2, 0.55, 57%
Step-by-step explanation:
I changed everything to decimal form to make it easy
10) 2/3 = 0.66
11) 7/10 = 0.7 7% = 0.07
12) 650% = 6.5
13) 5/8 = 0.625 38% = 0.38
14) 1/2 = 0.5 57% = 0.57