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balandron [24]
3 years ago
10

Students were surveyed about their favorite colors. 1/4 of the students preffered red, 1/8 of the students preffed blue, and 3/5

of the remaining students prefeered green. If 15 students preferred green, how many students were surveyed?
Mathematics
1 answer:
lapo4ka [179]3 years ago
8 0
27 is how much kids did the survey because I added all the fractions together like how the question did 3/5 which is 3 × 5 = 15
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If x>2,then x2-x-6/x2-4=
statuscvo [17]
\frac{x^2-x-6}{x^2-4}=(*)\\------------\\x^2-x-6=0\\a=1;\ b=-1;\ c=-6\\\Delta=b^2-4ac;\ \Delta=(-1)^2-4\cdot1\cdot(-6)=1+24=25\\\\x_1=\frac{-b-\sqrt\Delta}{2a};\ x_2=\frac{-b+\sqrt\Delta}{2a}\\\\x_1=\frac{1-\sqrt{25}}{2\cdot1}=\frac{1-5}{2}=\frac{-4}{2}=-2\\\\x_2=\frac{1+\sqrt{25}}{2\cdot1}=\frac{1+5}{2}=\frac{6}{2}=3\\\\x^2-x-6=(x+2)(x-3)
---------------------\\x^2-4=x^2-2^2=(x-2)(x+2)\\-------------------\\\\(*)=\frac{(x+2)(x-3)}{(x-2)(x+2)}=\frac{x-3}{x-2}


6 0
3 years ago
Please help fix my answers this is do tomorrow :( . all the circled ones. Greatly appreciated
Dmitry_Shevchenko [17]
#3 is correct at 120.4

#4 is 15/8...because 3/4+3/4=6/4 (for 20 doors) plus 3/8 (which is half of 3/4 for 5 more doors) equals 15/8 gallons or 1.875 gallons

#5 is $812.50 because if 50 shares cost $125, 325 shares (125×6.5) equals 812.50
7 0
3 years ago
Write a compound inequality to represent all of the numbers between -4 and 6.
OlgaM077 [116]
-4<x<6
should be the correct answer because x is larger than -4 but 6 is larger than x.
you could also write it
-4<x AND x<6
6 0
3 years ago
ILL MARK BRAINIEST IF YOU DO THIS CORRECTLY!!!
ehidna [41]

Answer:

76 percent done.

Step-by-step explanation:

Reasoning for this if its 76/100 you know that it will be 76. Or im Just got confused.

7 0
2 years ago
Please need help thank you
mel-nik [20]
Perimeter 430
Length 172
172 next
430 last(after the =)
5 0
3 years ago
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