Answer:
She can make 10 batches, and the four of each batch will cost $0.40.
Step-by-step explanation:
There are effectively 10 2 cup servings in the bag.
$4/10=$0.40
First one:
2x + y = -7-1
2x + x + 10 = -8
3x + 10 = -8
3x = -18
x= -6
Idk the second one. SOOORRRYYY!
Answer:
197
Step-by-step explanation:
Sample proportion is; p^ = 12/50 = 0.24
Margin of error of 5% is given by the formula;
ME = (z_0.05) √[p^(1 - p^)/n]
Let's make n(number of sample) the subject.
n = ((z_0.05)/ME)²((p^)(1 - p^))
From tables, the z-score of 0.05 is 1.645
Thus;
n = ((1.645)/0.05)²(0.24(1 - 0.24))
n ≈ 197
3x-2
3*10-2=28
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Answer:
Step-by-step explanation: