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3 years ago

[PLEASE HELP! DUE IN 3 HOURS!]

Mathematics

1 answer:

weeeeeb [17]3 years ago

3 0

The total amount in her savings account is 12,058.78

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Barry has 17 more than two-thirds of the number of cards in his brother’s baseball card collection. If x represents the number o

ioda

Answer:

(2/3) x + 17

Step-by-step explanation:

One way we can solve this is to start at x and to work from there.

Since x represents the number of baseball cards that Barry's brother has, and the closest phrase to it is "two-thirds of the number of cards", we can start by writing that as "2/3 of x", or (2/3) * x.

Next, we have "17 more than two-thirds of ...". We have 17 more than the number we just got, so we have 17 more than (2/3) * x = 17 + (2/3) * x = (2/3)*x + 17 as our answer

4 0

3 years ago

Let f(x)=2x^2−1.

Snowcat [4.5K]

If we begin with f(x)=2x^2−1 and graph this quadratic, and then translate the entire graph 2 units to the left, we get g(x) = 2(x+2)^2 -1.

Were it 4 units to the left, then h(x) = 2(x+4)^2 - 1 (example only)

8 0

3 years ago

A botanist wishes to estimate the mean number of seeds for a certain fruit. She samples 11 specimens and finds the average numbe

Aliun [14]

Answer:

a)The 98% of confidence intervals are

Lower bound of CI = 47 -3.82436 = 43.1756

Upper bound of CI = 47 + 3.82436 = 50.8243

b) The conditions are required for the validity of the interval

A) μ known

Step-by-step explanation:

Explanation:-

The given sample size is 'n' =11

Given the average number of seeds is 47 with a standard deviation of 7

Sample mean (x⁻) = 47

Standard deviation (S) = 7

The 98% of confidence intervals are

$(x^{-} - t_{0.02} \frac{S}{\sqrt{n} } , x^{-} + t_{0.02}\frac{S}{\sqrt{n} } )$

$(47 - t_{0.02} \frac{7}{\sqrt{11} } , 47+ t_{0.02}\frac{7}{\sqrt{11} } )$

The degrees of freedom = n-1 =11-1 =10

t₀.₀₂= 1.812 ( from t - table)

now the intervals are

$(47 - 1.812 \frac{7}{\sqrt{11} } , 47+ 1.812\frac{7}{\sqrt{11} } )$

Lower bound of CI = 47 -3.82436 = 43.1756

Upper bound of CI = 47 + 3.82436 = 50.8243

The conditions are required for the validity of the interval

A) μ known

Explanation:-

If a random sample xi of size 'n' has been drawn from a normal population with a specified mean (μ) known.

The limit for (μ) is given by

$(x^{-} - t_{0.02} \frac{S}{\sqrt{n} } , x^{-} + t_{0.02}\frac{S}{\sqrt{n} } )$

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3 years ago

Which shape has sides that are straight and connected?

iris [78.8K]

Answer:

The first shape

Step-by-step explanation:

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3 years ago

Read 2 more answers

TAKE A SNIPER TAKE A SHOT TAKE THESE POINTS.

gulaghasi [49]

Answer:

1.5

Step-by-step explanation:

(6,-4)*1.5=(9,-6)

(2,-8)*1.5=(3,-12)

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3 years ago