I think by 1-5 you mean 1/5??
1/5 = 0.20 = 20%
50% + 20% = 70%
100-70 = 30
so 30% were sponge cakes
Radical 2 = 1.4 So 1.4 * 6 = 8.4
a^2 + b^2 = c^2
8.4^2 + 8.4^2 = square root of c
70.56 + 70.56 = 141.12 ≈ 141
Then you must find the square root of 141 which is 11.874 ≈ 11.9
Side a = 8.4
Side b = 8.4
Side c = 11.9
Part A:
3x^2-15x+20=0
ax^2+bx+c=0; a=3, b=-15, c=20
Radicand: R=b^2-4ac
R=(-15)^2-4(3)(20)
R=225-240
R=-15<0, then the equation has two imaginary solutions (no real)
Part B:
3x^2+5x-8=0
a=3, b=5, c=-8
R=(5)^2-4(3)(-8)
R=25+96
R=121>0, then the equation has two different real solutions:
x=[-b+-sqrt(R)] / (2a)
x=[-5+-sqrt(121)] / [2(3)]
x=(-5+-11) / 6
x1=(-5-11)/6=(-16)/6→x1=-8/3
x2=(-5+11)/6=6/6→x2=1
Solutions: x=-8/3 and x=1
I shose this method because I can get the solutions directly, and I don't have to guess the possible solutions
Answer 1:
Well, the answer would be 9.375% increase or 9% increase
Step-by-step explanation:
You start by <em>17.5 - 16, </em> which will equal <em>1.5.</em>
Then, <em>1.5 ÷ 16, </em>that will get you <em>0.09375</em>
Finally, <em>0.09375 × 100 </em>will get you the answer of <em>9.375.</em>
Then you round it to <em>9% </em>which is your answer
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Answer 2:
<em>18.04</em>
Step-by-step explanation:
Turn 18% into a decimal (0.18) and multiply <em>22 by 0.18 </em>which will get you <em>3.96</em>.
Then take 3.96 and subtract it from 22, that will be <em>18.04</em>.
So, <em>18.04</em> is your answer.