Sarah mixes 2/3 cup of low fat milk and 1/2 cup of skim milk and the mixture has 111 calories. She knows that if she mixes one c
up of low fat milk and one cup of skim milk that the mixture will have 188 calories. How many calories are in one cup of low fat milk and how many calories are in
one cup of skim milk?
A 102 calories in a cup of low fat milk and 86 calories in a cup of skim milk
B 102 calories in a cup of low fat milk and 40 calories in a cup of skim milk
C 86 calories in a cup of low fat milk and 102 calories in a cup of skim milk
D 40 calories in a cup of low fat milk and 102 calories in a cup of skim milk
one cup of skim milk?
A 102 calories in a cup of low fat milk and 86 calories in a cup of skim milk
B 102 calories in a cup of low fat milk and 40 calories in a cup of skim milk
C 86 calories in a cup of low fat milk and 102 calories in a cup of skim milk
D 40 calories in a cup of low fat milk and 102 calories in a cup of skim milk
1 answer:
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Answer:
x=πn, n∈Z
Step-by-step explanation:
if sin²2x=1-cos²2x, then
1-cos²2x-2cos2x+2=0; ⇒ cos²2x+2cos2x-3=0; ⇔ (cos2x+3)(cos2x-1)=0;