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Mamont248
22 days ago
5

Lorraine took two practice tests to prepare for an academic competition. On her first test, she completed 52 questions in the al

lotted time. On her second test, she completed 64 questions. To the nearest whole percent, what was the percent increase in the number of questions she completed?
Mathematics
2 answers:
Leona [9.2K]22 days ago
8 0

Response:

hh

Detailed breakdown:

djdjdj

Zina [9.1K]22 days ago
3 0

Response:

creative brief

Detailed breakdown:

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Max's initial distance from Kim
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You decide that you want to buy a new laptop computer for the start of the new school year. You go to Top Notch Electronics to m
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To find the total amount owed, convert the sales tax of 6.25% into a decimal by turning it into 0.0625. Multiplying this by 600 gives 37.5, then adding that to 600 results in a total of.... $637.5 Yw (:
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Which are the roots of the quadratic function f(b) = b2 – 75? Select two options. b = 5 StartRoot 3 EndRoot b = Negative 5 Start
zzz [9093]

Answer:

b = 5√3

b = -5√3

Step-by-step explanation:

We have

f(b)=b^{2}-75

Keep in mind, the root of a function corresponds to the value of x at which the function's output is zero.

In this case

The roots of the equation are the b values for which f(b) equals zero.

Thus

For f(b)=0

b^{2}-75=0

b^{2}=75

Take the square root of both sides

b=(+/-)\sqrt{75}

Now simplify

b=(+/-)5\sqrt{3}

b=5\sqrt{3}  and b=-5\sqrt{3}

So we find that

b = 5√3

b = -5√3

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26 days ago
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jane lives 1 3/8 miles from the airport. She drove from her house to the airport and back 2 times. How far did Jane drive? Move
Leona [9271]

Response:

5\frac{1}{2}\ mi

Detailed explanation:

We are aware that

1\frac{3}{8}\ mi=\frac{1*8+3}{8}=\frac{11}{8}\ mi

She made the trip between her residence and the airport twice.

Therefore,

Multiply the distance from her house to the airport by 4.

(4)*\frac{11}{8}=\frac{11}{2}=5\frac{1}{2}\ mi

4 0
26 days ago
An ANOVA procedure is applied to data obtained from 6 samples where each sample contains 20 observations. The degrees of freedom
PIT_PIT [9121]

Answer:

C. 5 degrees of freedom for the numerator and 114 for the denominator

Step-by-step explanation:

Analysis of variance (ANOVA) is utilized to examine the variations among group means within a sample.

The sum of squares represents the cumulative square of variation, which refers to the deviation of each individual value from the grand mean.

Assuming there are 6 groups and each group contains j=1,\dots,20 individuals, the variation can be calculated using the following formulas:

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2

SS_{between}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2

This also has the property

SST=SS_{between}+SS_{within}

The numerator's degrees of freedom in this case is given by df_{num}=df_{within}=k-1=6-1=5 where k = 6 represents the number of groups.

The denominator's degrees of freedom in this scenario is indicated by df_{den}=df_{between}=N-K=6*20-6=114.

The total degrees of freedom would be df=N-1=6*20 -1 =119.

Thus, the appropriate answer would be 5 degrees of freedom for the numerator and 119 degrees of freedom for the denominator.

C. 5 numerator and 114 denominator degrees of freedom

8 0
25 days ago
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