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morpeh [17]
3 years ago
5

Norachai and six of his friends went out to eat. They decided to split the bill evenly. Each person paid $9. What was the total

bill?
Mathematics
1 answer:
Reptile [31]3 years ago
3 0

Answer:

$63

Step-by-step explanation:

1. Norachai and 6 of his friends = 7

2. Each of them paid $9

3. 7x9=63

4. The total bill was $63

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What’s a equivalent ratio
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Ratios that are equivalent to each other are considered equivalent ratios. For example, 2:6 is equal to 6:18

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What is the equation of the line that passes through the points (−2,4) and (0,3)?
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Step-by-step explanation:

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The parallelogram shown below has an area of 30 units2.
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Last week Andi had exams in Chemistry and in Spanish. On the chemistry exam, the mean was µ = 30 with σ = 5, and Andi had a scor
ValentinkaMS [17]

Answer:

Chemistry

Step-by-step explanation:

To solve the above question, we use the z score formula

Andy took two Exams, Chemistry and Spanish. So we find the z score for both exams.

a) Chemistry Exam

On the chemistry exam, the mean was µ = 30 with σ = 5, and Andi had a score of X = 45

z-score is given as: z = (x-μ)/σ

where x is the raw score,

μ is the population mean

σ is the population standard deviation

z = (x-μ)/σ

z = (45 - 30)/5

z = 15/5

z = 3

b) On the Spanish exam, the mean was µ = 60 with σ = 6 and Andi had a score of X = 65.

z-score is given as: z = (x-μ)/σ

where x is the raw score,

μ is the population mean

σ is the population standard deviation

z = (x-μ)/σ

z = (65 - 60)/6

z = 5/6

z = 0.8333333333

Comparing the z score of both Exams,

Andy had a z score of 3 in the Chemistry exam and 0.8333333333 in the Spanish exam.

Therefore, Andy should be expecting a better grade in the Chemistry exam because his z score in the Chemistry exam was higher than that of the Spanish exam.

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3 years ago
Find the number that makes the ratio equivalent to 3:4
boyakko [2]
One answer could be 6:8
6 0
2 years ago
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