PLS HELP
Two students are comparing scientific experiments to investigations. They came up with the following ideas.

Student A: Testing plant growth in different types of soils
Student B: Comparing the water level in a lake during different times of the year

Which student gave an example of a scientific experiment?

Student A because it requires experimental and control groups
Student B because it requires a hypothesis
Student A because it is preferably done in natural settings
Student B because it is preferably done across a long period of time

Answer:

X + 5 =  X + 5

Step-by-step explanation:

The answer is X + 5 because they both are different simbuls, wich means you cant add them. The answer just stayes x + 5.

Answer: b

Step-by-step explanation:

Answer:

2000 people

Step-by-step explanation:

4%= 80

2%=40

1%=20

100%= 2000 people

Hope this helped! :)

Answer:

2000 people

Step-by-step explanation:

80:4%

y:100%

[tex]\frac{80}{y} =\frac{4}{100}[/tex]

y × 4 = 80 × 100

4y = 8000

4y ÷ 4 = 8000 ÷ 4

y = 2000

Step-by-step explanation:

Recall the Ratio for tan

Tan(theta) = opposite / adjacent

Tan (x) = 9 / 5

solve for x (use Tan^-1(...) )

Answer:

Step-by-step explanation:

take x as reference angle

using tan rule

tan x=opposite/adjacent

tan x=9/5

tan x=1.8

x=tan 61 degree

x=61 degree

for remaining angle

remaining angle+90+61=180 degree(being sum of interior angle of a triangle)

remaining angle=180-151

remaining angle=29 degree

Answer: [tex]-7.60,\ -4.47[/tex]

Step-by-step explanation:

Given

[tex]f(x)=-1.3x^2-15.7x-44.2[/tex]

The solution of the standard quadratic equation [tex]ax^2+bx+c=0[/tex] has solution

[tex]x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

Applying the above principle

[tex]\Rightarrow x=\dfrac{15.7\pm\sqrt{(-15.7)^2-4(-1.3)(-44.2)}}{2(-1.3)}\\\\\Rightarrow x=\dfrac{15.7\pm\sqrt{246.49-229.84}}{-2.6}\\\\\Rightarrow x=\dfrac{15.7\pm \sqrt{16.65}}{-2.6}\\\\\Rightarrow x=\dfrac{15.7\pm 4.08}{-2.6}\\\\\Rightarrow x=-7.60,\ -4.47[/tex]

The zeroes of the equation are -7.60, -4.47.

Answer:

30-2t^2+16t/t

Step-by-step explanation:

Answer:

27

Step-by-step explanation:

540/20=27

Answer:

28 of the student do not snowboard

Step-by-step explanation:

Answer:

Make a graph similar to this picture:

Answer:

make a graph one side being for the -3,-2,-1 and the other for the -2<x<-1?

Step-by-step explanation:

Answer:

32/24

Step-by-step explanation:

opposite/ adjacent

Answer:

32/24

Step-by-step explanation:

Answer:

165.2

Step-by-step explanation:

7%x4=28

28 percent of 590 = 165.2

Answer:

100 sq cm

Step-by-step explanation:

area of the rectangle

10x8=80

area of the triangle

8x5=40/2=20

80+20=100

Answer:

21

Step-by-step explanation:

because jane is 5 years older and 16 + 5 eaquls 21i had mutiplule choice answers

Answer: 0 is y intercept and 6 is x intercept.

Step-by-step explanation:

Answer:

A. 23/30

Step-by-step explanation:

2/3+1/10

Find the LCM (Least Common Multiple):

20/30+3/30 = 23/30

Answer:

A

Step-by-step explanation:

you put 2/3 = 20/30 because you add a 0 2 * 10 is 20 and so on. same for 1/10 multiply nand d by 3= 3/30 so 20/30+3/30= 23/30

Answer:

36in for the 1st one

Step-by-step explanation:

Answer:

36 in- mild

Hope this helps!!

Answer:

5×5×6 = 150 centimeters3

Step-by-step explanation:

The interquartile range (IQR) of the given data = Upper Quartile (Q3) - Lower Quartile (Q1) = 121.

The interquartile range (IQR) = Upper Quartile (Q3) - Lower Quartile (Q1)

Given the data:

87, 102, 131, 132, 155, 173, 178, 204, 211, 244, 253, 278, 301, 371

Upper quartile (Q3) = 253

Lower Quartile (Q1) = 132

Interquartile range (IQR) of the data = 253 - 132

Interquartile range (IQR) of the data = 121

Learn more about the interquartile range (IQR) on:

https://brainly.com/question/17083142

#SPJ2

Step-by-step explanation:

[tex]\small\mathfrak\red{here \: is \: your \: solution...} \\ \\ \small\mathcal\purple{volume \: of \: hemisphere \: = (2 \div 3)\pi \: r ^{3 \: } .} \\ \\ \small\mathfrak\purple{radius \: of \: hemisphere \: = 6 \: cm.} \\ \\ \small\mathfrak\purple{volume \: of \: hemisphere \: = (2 \div 3)(22 \div7 ) \times 6 {}^{3} .} \\ \\ \small\mathfrak\purple{volume \: = 452.16 \: cm {}^{3} .} \\ \\ \huge\mathfrak\pink{hope \: it \: helps.}[/tex]

Answer:

Step-by-step explanation:

Distribution comes first, so:

7y-9 = 2y-8+1

Then you simplify:

7y-9 = 2y-7

Then you subtract or add the lowest number with a letter:

5y-9 = -7

Now you get 5y alone, so we add the 9:

5y = 2

Then you divide 5y = 2 by 5

y = 2/5 or .4

=====================================================

We'll use this formula

a & b/c = (a*c + b)/c

to convert from a mixed number to an improper fraction.

Let's convert the first mixed number to an improper fraction

a & b/c = (a*c + b)/c

3 & 3/4 = (3*4 + 3)/4

3 & 3/4 = 15/4

Repeat the same idea for the second mixed number as well

a & b/c = (a*c + b)/c

3 & 1/3 = (3*3 + 1)/3

3 & 1/3 = 10/3

--------------------

In short we have

Doing these conversions is useful to be able to multiply the values like so:

(15/4)*(10/3) = (15*10)/(4*3) = 150/12 = (6*25)/(6*2) = 25/2

Now use your calculator to find that 25/2 = 12.5

We can then say....

12.5 = 12 + 0.5 = 12 + (1/2) = 12 & 1/2

The answer is choice F) 12 & 1/2 square yards.

Answer:

27°

Step-by-step explanation:

The two lines are parallel, causing them to be equal

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer:

12

Step-by-step explanation:

Answer:

x = 4

Step-by-step explanation:

I took the test and it was right :)

Answer:

gvaaliyar steshan steshan

It is to true!!!!!!!!!!!!!!!!!!!!!!!!