All categories

3 years ago

Direct variation: if y = 4, when x = -2, find x when y = 6

Mathematics

2 answers:

Contact [7]3 years ago

6 0

-3 because when y is two then x is -1 so if you multiply both values by 3 then y is 6 and x is -3

Julli [10]3 years ago

4 0

Answer:

-3

Step-by-step explanation:

Because when y is 4, x is 4/-2 = -2

So when y is 6,

x= 6/-2

= -3

You might be interested in

What does <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="dafb9a">[email protected]</a>#., ;'. Tra

jenyasd209 [6]

Code:!#@$% Means there is a "Cuss word for adults to say"

7 0

4 years ago

An art history professor assigns letter grades on a test according to the following scheme.A: Top 5% of scoresB: Scores below th

adoni [48]

Answer:

Grade B score:

$76 \leq x \leq 89$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73.3

Standard Deviation, σ = 9.7

We are given that the distribution of score on test is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

B: Scores below the top 5% and above the bottom 62%

We have to find the value of x such that the probability is 0.62

$P( X > x) = P( z > \displaystyle\frac{x - 73.3}{9.7})=0.62$

$= 1 -P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.62$

$=P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.38$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 73.3}{9.7} = 0.305\\\\x = 76.26$

We have to find the value of x such that the probability is 0.05

$P(X < 0.95) = \\\\P( X < x) = P( z < \displaystyle\frac{x - 73.3}{9.7})=0.95$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 73.3}{9.7} = 1.645\\\\x = 89.26$

Thus, the numerical value of score to achieve grade B is

$76 \leq x \leq 89$

7 0

3 years ago

I need the explanation too !

lubasha [3.4K]

<h2>Step-by-step explanation:</h2>

$- 2y + x + 3 - 5x + 7 + 4y$

$= - 2y + 4y + x - 5x + 7 + 3$

$= 2y - 4x + 10$

THIS IS YOU'RE ANSWER

HOPE IT HELPS

MARK ME THE BRAINLIEST...

6 0

3 years ago

Read 2 more answers

Find the surface area for the following prisms.

liubo4ka [24]

Answer:

uixis9sugwhwo19wha

Step-by-step explanation:

isisisisisisi

7 0

3 years ago

Statistics question! 12 pts

Nataly [62]

Answer – C. the sample size 16 is too small

If we toss a coin 16 times in order to test the hypothesis H0: p = 0.5 that the coin is balanced, we can't use the z-test for a proportion in the situations because the sample size 16 is too small. The z-test is best used when the sample size is greater than 30; when the sample size is less than 30, t-test is more appropriate.

5 0

3 years ago