Worth 15 points please help will give brainliest to correct answer

A Scientist wants to test the effect of water temperature on the success of developing frog embryos. The scientist monitors developing
embryos in different water temperatures and counts the number of embryos that mature into tadpoles.

Which variable is the independent variable?

A. Number of frog embryos

B. Species of frog

C. Number of tadpoles

D. Water temperature​

Answer:

because of parallel lines it's 63

Answer:

4.140393356

Step-by-step explanation:

Mean = (3+4+5+7+10+12+15) / 7 = 8

Count = 7 numbers

Sum of the numbers = 56

Each number minus the mean =

(3-8=-5)(4-8=-4)(5-8=-3)(7-8=-1)(10-8=2)(12-8=4)(15-8=7)

Now square of each of these numbers:

25+16+9+1+4+16+49 = 120

Variance = 120/7 = 17.14285714

Standard deviation = square root of the variance

Sqrt 17.14285714 = 4.140393356

Answer:

no

0-9 is nine

coz zero have no value to subtaract 9 from zero

Step-by-step explanation:

72÷9= 8, so the boat was only doing 8mph going upstream (against the current) the return trip downstream only took 4 hours. 72÷18=4 meaning the boat was traveling at 18mph downstream (no current) there is a 10mph difference between upstream and downstream therefore the current had to be running at 10 mph. so the speed of the tug boat is 8mph without a current and the current is running at 10mph.

Answer:

Algebra =

X/4 = -5/20

Simplify :

X/4 = -1/4

Of course, Will same x/4 = -1/4

x = -1

Step-by-step explanation:

[tex]\begin{aligned}\tt\frac{x}{4}&=\tt\frac{-5}{20}\\\tt 20x&=\tt -5\times 4\\\tt 20x&=\tt -20\\\tt x&=\tt -1\end{aligned}[/tex]

Answer:i think 24

Step-by-step explanation:

The polynomial [tex]x^3+ px^{2}-x-2[/tex] contains x - 1 as a factor.

The value of p = 2.

Given:

The polynomial [tex]x^3+ px^{2}-x-2[/tex] contains x - 1 as a factor.

Comparing x - 1 with x - a then

Substitute the value of x = 1, then we get

[tex]$1^3+p*1^2-1-2 = 0[/tex]

[tex]$1^{3}+p \cdot 1^{2}-1-2=0$$[/tex]

Apply rule [tex]$1^{a}=1$[/tex]

[tex]$&1^{3}=1,1^{2}=1 \\[/tex]

[tex]$&1+1 \cdot p-1-2=0[/tex]

Multiply: p-1 = p

1+p -1-2=0

Group like terms

p+1-1-2 = 0

Add/Subtract the numbers: 1-1-2 = -2

p-2 = 0

Add 2 to both sides

p-2+2 = 0+2

Simplify

p = 2

Therefore, the value of p = 2.

To learn more about polynomial function

https://brainly.com/question/11434122

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Answer:

[tex]y = - \frac{2}{3} x + 1[/tex]

Step-by-step explanation:

2x +3y= 5

3y= -2x +5

Divide both sides by 3:

[tex]y = - \frac{2}{3} x + \frac{5}{3} [/tex]

[tex]y = - \frac{2}{3} x + 1 \frac{2}{3} [/tex]

Now that the equation is in the slope-intercept form (y= mx +c), the slope of the given line is the coefficient of x.

[tex]slope = - \frac{2}{3} [/tex]

Parallel lines have the same slope.

Slope of unknown line= -⅔

y= -⅔ +c

To find the value of c, substitute a pair of coordinates into the equation.

When x= 3, y= -1,

[tex] - 1 = - \frac{2}{3} (3) + c[/tex]

-1= -2 +c

c= -1 +2

c= 1

Thus, the equation of the line is y= -⅔x +1.

Answer:

0

Step-by-step explanation:

combine the same variables

Answer: Infinite Solution

Step-by-step explanation: 2.5x+0.25=2.5x+0.25, since the equations are equal, any number you plug in will be the same.

Answer:

hakjafhskjfhakjhf Y=mx + b

Step-by-step explanation:

Yep Yep thats how you do it

Answer:

xfjsryjfncbhzdjdzetjz

Step-by-step explanation:

Answer:

2.85 x 10^4

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

75-6=4y+4y+3.5y

or 11.5y=69

or y=69\11.5

     =6

Answer:

- 7.5 y - 4y= 6 - 75

Step-by-step explanation:

= - 11.5y = -69

= y = 6

Answer:

x=19/10

Step-by-step explanation:

abcdefghijklmnopqrstuvwxyz

Answer:

a

Step-by-step explanation:

the balloon was at 595 feet

595

then it dropped 495 feet

525-495= 30

the equals 30 means that it is currently 30 feet above the ground

and if it dropped another 15 feet it would not reach the ground, which is zero, the balloon would still be 15 feet above the ground

30-15= 15

so the balloon never reached zero

Answer:

A

Step-by-step explanation:

I took the quiz and got a 100, please mark brainlyiest

Answer:

12m perimeter

Step-by-step explanation:

all side are 3m so 3x4 = 12m

Answer:

7x-11

Step-by-step explanation:

Answer:

7x-11=

X= 11/7

Step-by-step explanation:

Answer:

72

Step-by-step explanation:

Answer:

72

Step by Step Explanation:

By definition, the angle labeled as x and the angle labeled as 2x-36, when added, they're equal to 180.

You set up an equation to solve for x:

x+2x-36=180

3x-36=180

3x=216

x=72

Answer:

1.6

Step-by-step explanation:

Answer:

2/3

Step-by-step explanation:

Answer:

5, i think

Step-by-step explanation:

1. 3x = 15 and divide all by 3 (the number with a variable or letter

Answer:

m = 2

Step-by-step explanation:

Rise:4 and run=2

4/2 = 2

Answer:

The length of side A'D' is 4 units.

The length of side AD is 8 units.



The image is larger than the pre-image.

The correct answers are B, C, and D



Answer:

The correct answer is A B E

Step-by-step explanation:

The length of side AD is 8 units.

The length of side A'D' is 4 units.
The scale factor is 1/2.

Answer:

(2x-3)(7x-4)

2x(7x-4)-3(7x-4)

14x²-8x+21+12

14x²-8x+33

Answer:

14 x square - 29x + 12

Step-by-step explanation:

(2x - 3)(7x – 4)

14x squared - 8x- 21x + 12

14 x square - 29x + 12

Answer:

x = 5

Step-by-step explanation:

Step 1: Distributive property

Using this property means when you have something like the equation on the right side ( 4 ( x + 3 ) ) you multiply both the values in the parentheses by the number outside:

4 ( x + 3 )

( 4 x X ) + ( 4 x 3 )

4x + 12

8x + 2 = 2x + 4x + 12

Step 2: combine like terms

Combining like terms is when you find like terms with the same variables and such and add them together:

8x + 2 = 12 + ( 2x + 4x )

8x + 2 = 12 + 6x

Step 3:Using inverse operations

This means that you need to get a variable one one side and a constant on the other:

8x + 2 ( -2 ) = 12 ( -2 ) + 6x

8x = 10 + 6x

8x ( -6x ) = 10 + 6x ( -6x )

2x = 10

Step 4: solve for the variable

The last thing you need to do is divide both sides by the constant with the variable ( 2x ) to get x by itself:

2x ( /2 ) = 10 ( /2 )

x = 5

Answer:

x=5

Step-by-step explanation:

Step 1:Using the distributive property on the right side of the equation

8x+2=2x+4(x+3)

8x+2=2x+4x+12

Step2:Combining the like terms on the right side if the equation (Since there are no like terms on the left side) :

8x+2=6x+12

Step 3: Using the inverse operations to get the variables on the left side and the constants on the right side of the equation :

8x-6x=12-2

Step4: Using inverse operation to solve for the variable of interest which is 'x':

2x=10 (Dividing both sides by two sides by 2)

x=5

Answer:

x=6,−4

Step-by-step explanation:

1 Switch sides.

(x-6)(x+4)=0  

2 Solve for xx.

x=6,-4

Answer:

2−2−24

Step-by-step explanation:

Answer:

B, C

Step-by-step explanation:

B is the answer, and C is equivalent.

Hope This Helped!

Answer:

3A-5

Step-by-step explanation:

Answer:

3a-5

answer

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