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Neporo4naja [7]
3 years ago
12

What is the formula for this equation?

Mathematics
1 answer:
Karolina [17]3 years ago
3 0

Answer:

x + 2x + 1/2x = 224

Step-by-step explanation:

x + 2x + 1/2x = 224

3.5x = 224

x= 64

64×2=128

Hen baked 128 cookies on the second day

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What is this total fruit = 8.27+6.65
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14.92

Step-by-step explanation:

8.27+6.65=14.92

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I believe the Science Students have a higher average grade on their respective tests.

Step-by-step explanation:

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DochEvi [55]

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2x^2-12x+5

Step-by-step explanation:

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3 years ago
How many different 4-question geometry quizzes can a teacher make if there are 7 different problems to test on?.
stich3 [128]

Answer:

35 quizzes

Step-by-step explanation:

We need to determine how many ways we can choose 4 questions out of 7 to make the quizzes.

We do this by using the formula \displaystyle nCr=\frac{n!}{r!(n-r)!} which describes the number of ways we can choose r objects given n possible choices. So, if n=7 and r=4, then:

_4C_7=\frac{7!}{4!(7-4)!}\\\\_4C_7=\frac{7*6*5*4!}{4!*3!}\\\\_4C_7=\frac{210}{6}\\\\_4C_7=35

Hence, the teacher can make 35 different geometry quizzes.

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