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3 years ago

Please help me on this i will give you brainliest

Mathematics

2 answers:

slamgirl [31]3 years ago

8 0

Answer:
C!!!! 21+3=y+11

xeze [42]3 years ago

4 0

Answer:

option c. 21+3=y+11

............

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What is the sum of the first 10 terms in the sequence 1, 3/2, 9/4, 27/8, 81/16

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Answer:

This is GP and number of terms is 10 first term is 1 ratio is 3/2

Step-by-step explanation:

Using the formula u get sum as 113.33 (didn't calculate in fraction)

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3 years ago

What is |1| ___ - 1?

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= because the bars mean like to opposite..... so absolute value of |1|=-1

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3 years ago

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What is the value of x

azamat

Answer:

x = 20

Step-by-step explanation:

given a line parallel to a side of a triangle and intersecting the other two sides, then it divides those sides proportionally , that is

$\frac{10}{5x+10}$ = $\frac{11}{121}$ = $\frac{1}{11}$ ( cross- multiply )

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5x = 100 ( divide both sides by 5 )

x = 20

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3 years ago

The following random sample was selected from a normal distribution: 4.5, 6.4, 2.3, 1.8, 5.3, then the 95% confidence interval t

kap26 [50]

Answer:

the 95% confidence interval to estimate the population mean is between 1.62 and 6.50

Step-by-step explanation:

given data

distribution = 4.5, 6.4, 2.3, 1.8, 5.3

so n = 5

confidence interval = 95%

to find out

the population mean is between

solution

first we calculate the mean i.e.

mean = $\frac{1}{n}\sum_{i=1}^{n}x(i)$

mean = 4.5+ 6.4+ 2.3+ 1.8+ 5.3 / 5

mean = 4.06

now we calculate the standard deviation i.e.

standard deviation = $\sqrt{\frac{1}{n-1}\sum (x(i)-mean)^2}$

standard deviation = $\sqrt{\frac{1}{5-1}\sum (x(i)-mean)^2}$

standard deviation = $\sqrt{\frac{1}{5-1} (4.5-5)^2+(6.4-5)^2 +(2.3-5)^2+(1.8-5)^2+(5.3-5)^2}$

standard deviation = $\sqrt{\frac{1}{4} (4.5-5)^2+(6.4-5)^2 +(2.3-5)^2+(1.8-5)^2+(5.3-5)^2}$

standard deviation = 2.226544

so 95 % confidence interval is i.e. mean +/- t(5) * standard deviation/ $\sqrt{n}$

here t(5) will be 2.45

95 % confidence interval= 4.06 +/- 2.45 * 2.226 / $\sqrt{5}$

95 % confidence interval= 1.62 and 6.50

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3 years ago

The entrance fee to a local waterpark is $34 per person. At the waterpark, you can rent a raft for $1.50 per hour. Which express

Tcecarenko [31]

Algebraic Equation:

The entrance fee to enter the park is fixed and the amount of hours Leah will spend at the park is a variable.

We need to add the fixed and variable amounts.

34 + h

Because we don’t know how long Leah will spend on the raft we have to multiply h by the rate per hour for a raft.

34 + 1.50h

Therefore, Leah’s cost is 34 + 1.50h

6 0

3 years ago

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