Answer:
390
Step-by-step explanation:
assuming the sample is representative
65 took survey = 10 percent of sample (650)
39 said yes
total = 39 x 10 = 390
Answer:
ill try 2x2-4x-30=0
Two solutions were found :
x = 5
x = -3
Step by step solution :
Step 1 :
Equation at the end of step 1 :
(2x2 - 4x) - 30 = 0
4x - 10 = 70
5x - 30 = 70
8(x - 10) = 80
5x - 100 = 0
Therefore, option B would be the correct answer. :)
Answer:
x = 26 2/3
y = 50
Step-by-step explanation:
you could set '2y-3x' equal to '-3x+y+50' because they are vertical angles
2y - 3x = -3x + y + 50
add 3x to each side to get:
2y = y + 50
y = 50
also, we know that (1/2y + 25) + (2y - 3x) = 180 because they form a straight line
3/2y + 25 - 3x = 180
subtract 25 from each side to get:
3/2y - 3x = 155
substitute 50 for 'y' to get:
3/2(50) - 3x = 155
75 - 3x = 155
-3x = 80
x = 26 2/3
Answer:
4 yards in feet equals 12
4 yards in inches equals 144
Step-by-step explanation:
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