All categories

3 years ago

The variable y varies directly with x . If x=2 and y = −7, find y when x = −6.

Mathematics

2 answers:

telo118 [61]3 years ago

8 0

Step-by-step explanation:

$\frac{2}{ - 6} = \frac{ - 7}{y} \\ y = \frac{( - 6) \times (- 7)}{2} \\ y = \frac{42}{2} \\ \boxed{y = 21}$

<h2>21 is the right answer.</h2>

suter [353]3 years ago

7 0

Answer:

Step-by-step explanation:

X=2

Y=-7

Then if x is -6 u have to find what times 2 is -6 Which is -3.

so -7 x -3 is 21. Y is 21

You might be interested in

HELP ASAP ALG 2 I need this urgently

horrorfan [7]

Hello,

Answer H x>=3
===============

8 0

3 years ago

Determine the slope of a line that is perpendicular to the line whose equation is x - 2y = 6.

Degger [83]

Answer:

The answer is -1/2

Step-by-step explanation:

We first start by removing x in order isolate the y variable

2y = 6 - x

y = $\frac{6-x}{2}$

Further, we simplify the equation in order to get the value of m (slope)

y = 3 + $\frac{-1x}{2}$

Therefore, our slope is equivalent to -1/2

4 0

3 years ago

A potato chip manufacturer has found that in the past the standard deviation of bag weight has been 0.2 ounce. They want to test

Brut [27]

Answer:

Null Hypothesis: $\sigma=0.2$

Alternative hypothesis: $\sigma \neq 0.2$ (Changes on the deviation)

Step-by-step explanation:

s represent the sample standard deviation

$\sigma$ represent the population standard deviation (variable of interest)

$\sigma_o =0.2$ represent the value that we want to test

n represent the sample size

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

Based on this the system of hypothesis should be:

Null Hypothesis: $\sigma=0.2$

Alternative hypothesis: $\sigma \neq 0.2$ (Changes on the deviation)

In order to test these system of hypothesis we need to select a significance level $\alpha$ , then we need to calculate an statistic given by this formula.