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Flura [38]
2 years ago
6

Which of the statements is true for the two equations below? Equation A: 6+3x=3x-3 Equation B: 2(4x-1)=8x-2

Mathematics
1 answer:
Nesterboy [21]2 years ago
8 0

Answer:


Step-by-step explanation:


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5#The distribution of scores on a standardized aptitude test is approximately normal with a mean of 480 and a standard deviation
kirza4 [7]

We want to find the value that makes

P(X\ge x)=0.2

To find it we must look at the standard normal table, using the complementary cumulative table we find that

P(Z\ge z)=0.20045\Leftrightarrow z=0.84

Then, using the z-score we can find the minimum score needed, remember that

z=\frac{x-\mu}{\sigma}

Where

σ = standard deviation

μ = mean

And in our example, x = minimum score needed, therefore

\begin{gathered} 0.84=\frac{x-480}{105} \\  \\ x=0.84\cdot105+480 \\  \\ x=568.2 \end{gathered}

Rounding to the nearest integer the minimum score needed is 568, if you get 568 you are at the top 20.1%.

7 0
1 year ago
You rent a canoe for $4.50 per hour. Your cost before the tax is added is $18. Write an equation to find the number of hours H t
anygoal [31]

Answer:

total cost = cost/hour x hours

$18.00 = ($4.50)(X hours)

X=4 hours

Step-by-step explanation:

total cost = cost/hour x hours

$18.00 / 4.50=4 hours

6 0
2 years ago
Ruth has 12 feet of ribbon. She uses 7 feet of it for a craft project and gives 28 inches of it to her sister. How many inches o
Margaret [11]

Answer:

32 Ribbon's left

Step-by-step explanation:

5 0
3 years ago
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