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Olegator [25]
3 years ago
6

What is the sum of 2/5 and -4/5? A. -4/5 B. -2/5 C. 2/5 D. 4/5

Mathematics
1 answer:
lara [203]3 years ago
3 0

2/5 + (-4/5) = -2/5!

⭐ Please consider brainliest! ⭐

✉️ If any further questions, inbox me! ✉️

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If a regression analysis shows an R factor of 0.15, it is safe to assume a perfect positive relationship between cost and volume
saw5 [17]

Answer:

a very weak relationship between cost and volume

Step-by-step explanation:

The R factor is used to access the strength of the relationship between a dependent and independent variable. The R factor ranges between - 1 and 1. With negative values depicting a negative linear relationship and positive values meaning a positive relationship. The closer the R factor is to - 1 or + 1, the greater the strength, a value of 0 means, no correlation exists.

Hence, a R factor of 0.15 depicts a positive but very weak relationship between cost and volume as the R value is close to 0.

7 0
2 years ago
Can someone help me with these?
andre [41]

Answer:

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8 0
3 years ago
1<br> Solve - (8x – 12) = 2x – 3<br> 4<br> 218x -<br> pleaseee help!!
Alex Ar [27]

Answer:

1/4.(-96)=2x-3

-1/4.96=2x-3

-24=2x-3

-2x-24=-3

-2x=-3+24

-2x=21

x=-21/2

Step-by-step explanation:

8 0
3 years ago
Solve this inequality: 8z + 3 – 2z &lt; 51
MArishka [77]
8z +3 - 2z < 51
6z + 3 < 51
-3. -3
6z < 48
-- ---
6. 6

z<8
8 0
3 years ago
Read 2 more answers
Question 12 The GPAs of all students enrolled at a large university have an approximately normal distribution with a mean of and
andreev551 [17]

Complete question :

The GPAs of all students enrolled at a large university have an approximately normal distribution with a mean of 3.02 and a standard deviation of .29.Find the probability that the mean GPA of a random sample of 20 students selected from this university is 3.10 or higher.

Answer:

0.10868

Step-by-step explanation:

Given that :

Mean (m) = 3.02

Standard deviation (s) = 0.29

Sample size (n) = 20

Probability of 3.10 GPA or higher

P(x ≥ 3.10)

Applying the relation to obtain the standardized score (Z) :

Z = (x - m) / s /√n

Z = (3.10 - 3.02) / 0.29 / √20

Z = 0.08 / 0.0648459

Z = 1.2336940

p(Z ≥ 1.2336) = 0.10868 ( Z probability calculator)

8 0
3 years ago
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