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3 years ago

A system of linear equations has been graphed in the diagram. Determine a reasonable solution for the system of equations.

Mathematics

1 answer:

zaharov [31]3 years ago

5 0

Answer:

(- 2, 3)

Step-by-step explanation:

The solution of the graphed system is the point of intersection of the 2 lines.

This occurs in the second quadrant where the x- coordinate is negative and the y- coordinate positive.

A reasonable estimate is therefore (- 2, 3)

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Kyle throws a baseball straight up from a height of 4 feet with an initial speed of 30 feet per second. If Kyle doesn't catch th

Zielflug [23.3K]

Answer:

between which 2 times is the ball higher than 48 meters

Step-by-step explanation:

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3 years ago

3.1 , 3.4 , 3.25 , 3.33 from greatest to least

BlackZzzverrR [31]

Answer:

3.1 3.25 3.33 3.4

Step-by-step explanation:

4 0

4 years ago

Holding a participant variable constant has the double advantage of (1) preventing the variable from becoming a confounding vari

Elodia [21]

Answer:

The provided statement is True.

Step-by-step explanation:

Holding a variable constant implies that there are no kind of relationship between the variables and the treatments.

Holding a participant variable constant has the double advantage:

(1) preventing the variable from becoming a confounding variable

(2) reducing variance within groups.

A confounding variable effects both the dependent and the independent variable remarking a relationship between the two.

Variation within group implies the difference caused by the individual values of each group.

Thus, the provided statement is True.

5 0

3 years ago

At a track meet, Samma finished the 200-meter race in 25.98 seconds. Tom finished the 100-meter race in 12.54 seconds. Which run

ANEK [815]

Time = distance / speed

Samma : 200/25.98 = 7.70 meters per second
Tom : 100 / 12.54 = 7.97 meters per second

so the faster runner is Tom

8 0

3 years ago

Mr. Bond’s class wanted to estimate the mean mass of Snickers Fun Size bars. They randomly selected 74 bars and recorded the mas

AleksAgata [21]

Step 1: Find the standard error (SE)

The standard error is given by

$SE=\frac{s}{\sqrt[]{n}}$ $\begin{gathered} \text{ Where } \\ SE=\text{ the standard error} \\ s=\text{ the sample standard deviation} \\ n=\text{ the sample size} \end{gathered}$

In this case,

$n=74,s=0.76$

Therefore,

$SE=\frac{0.76}{\sqrt[]{74}}\approx0.0883$

Step 2: Find the alpha level (α)

$\alpha=1-\frac{(\text{Confidence level})}{100}$ $\alpha=1-0.99=0.01$

Step 3: Find the critical probability (P*)

$P^{\prime}=1-\frac{\alpha}{2}$

Therefore,

$P^{\cdot}=1-\frac{0.01}{2}=0.995$

Step 4: Find the critical value (CV)

The critical value the z-score having a cumulative probability equal to the critical probability (P*).

Using the cumulative z-score table we will find the z-score with value of 0.995

Hence,

$CV=2.576$

Step 5: Find the margin of error (ME)

$ME=SE\times CV$

Therefore,

$ME=0.0883\times2.576=0.2275$

Step 6: Find the confidence interval (CI)

$\begin{gathered} CI\text{ is given by} \\ CI=(\bar{x}-ME,\bar{x}+ME) \\ \text{ In this case} \\ \bar{x}=17.1 \end{gathered}$

Therefore,

$CI=(17.1-0.2275,17.1+0.2275)=(16.8725,17.3275)$

Hence there is a 99% probability that the true mean will lie in the confidence interval

(16.8725, 17.3275)

4 0

1 year ago