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yuradex [85]
3 years ago
12

Help please!

Mathematics
1 answer:
AlekseyPX3 years ago
4 0
I believe it’s C. Have a good day.
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To do so, the research has 100 high school students complete the maze with classical music playing. The mean time for these stud
Marizza181 [45]

Answer:

test statistic, z =  −1.74

Step-by-step explanation:

given data

students n = 100

mean time x  = 41.13 seconds

σ  = 5

we consider µ = 42

solution

we get here The test statistic that is express as

test statistic, z = \frac{x-\mu }{\frac{\sigma }{\sqrt{n}}}      ......................1

put here value and we will get

test statistic, z = \frac{41.13-42}{\frac{5 }{\sqrt{100}}}

test statistic, z =  −1.74

8 0
3 years ago
There are 364 students who are enrolled in an introductory biology course. If there are five boys to every eight girls, how many
Butoxors [25]

Answer:

The number of boys in the course will be = 140

Step-by-step explanation:

Given:

Total number of students enrolled in an introductory biology course = 364

There are 5 boys to every 8 girls in the course.

To find how many boys are in the course.

Solution:

Since, there are 5 boys to every 8 girls in the course.

So, ratio of boys to girls enrolled in the course = 5 : 8

Let the number of boys in the course be = 5x

Then number of girls in the course will be =  8x

Total number of students would be given as:

⇒ <em>Number of boys + Number of girls</em>

⇒ 5x+8x

⇒ 13x

Total number of students given = 364.

Thus, we have:

13x=364

solving for x

Dividing both sides by 13.

\frac{13x}{13}=\frac{364}{13}

∴ x=28

So, number of boys in the course will be = 5\times 28 = 140

5 0
3 years ago
Answer this questions right and i will give you Brainliest, Thanks, and 5 stars and thanks on profile.
katen-ka-za [31]

Answer:

1. k=5

2. a= -7

3. n=4

4. n=1

5.x=0

6. r= -4

7. b=31

8.n= -3

3 0
3 years ago
f x + y is rational, must x and y each be rational? A) Yes; because the sum of rationals is rational. B) No; because the sum of
Rudik [331]
The answer is D) Yes; because x and y must be integers, and integers are rational.
7 0
3 years ago
PLEASE SOMEONE HELP ILL MARK BRAINLIEST AND 5 STARS<br><br><br> 2.1/x+ 1 4/5= 3/10x
enot [183]

Answer:

the answer is .3 or 3/10

Step-by-step explanation:

8 0
3 years ago
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