25. 2x + 3y = 4
- 3x + 2y = 6
Demtermine if each of the lines are perpendicular

Answer:

x^2 - y^2

Step-by-step explanation:

In the following problem, we can use the distributive property to simplify:

(x + y)(x - y)

We can start by multiplying the x's together, giving us x^2.

Next is the first x multiplied by -y in the second parenthesis. This gives us -xy.

Now, we can move on the the y in the first parenthesis: y times x(in the second parenthesis) is xy.

Lastly, we have y times -y which gives us -y^2.

(This process is shown in the image attached)

If we aa these together we get:

x^2 - xy + xy - y^2

If we add -xy and xy it would be 0 because if you add a number with it's opposite, they cancel out. We are just left with x^2 - y^2.

Answer:

the answer is 6

Step-by-step explanation:

Answer:

168 girls

Step-by-step explanation:

126 boys and 168 girls.

126 is the number of how many male students there are meaning the amount of females should be above 126

Answer:

11-2i

Step-by-step explanation:

Distribute the negative

5-5i+6-3i

Combine like terms

11-2i

Hope this helped!!

Have a nice day!

Answer:

[tex]\boxed{\sf 11-2i}[/tex]

Step-by-step explanation:

[tex]\sf (5-5i)-(-6-3i)[/tex]

Opposite of -6 - 3i is 6+3i:

[tex]\sf 5-5i+(6+3i)[/tex]

Combine real and imaginary numbers 5-5i and 6+3i:

[tex]\sf 5+6+(-5+3)i[/tex]

Add 5 to 6, and -5 to 3:

[tex]\sf 11-2i[/tex]

_______________________

Answer:

7.001 cm

Step-by-step explanation:

A = pi r^2

154 = pi r^2

r^2 = 154/pi

r = sqrt(154/pi)

r = 7.001

Answer:

an ascending straight line graph is linear and has a positive slope when y is more than x or the same, when y appears less than x in slope it becomes less steeper but when all slopes are positive so are x and y relationship.

Step-by-step explanation:

You can also have a positive slope ascending straight line to a constant straight line, this becomes a change simply as and when the velocity changes.

Since the velocity vs time graph is a straight line, the secant line will always coincide with it. So, the slope of the secant line is always equal to the slope of the graph, meaning that the average acceleration is always equal to the constant acceleration. Velocity vs time graph consisting of an ascending line.

Answer:

A and B

Step-by-step explanation:

2m-3<-9

2m<6

m<-3

Answer:

8900

Step-by-step explanation:

10^x:

x is how many zeros there are after the number being multiplied by the 10^x.

Answer:

8900

Step-by-step explanation:

When you multiply the 10^x how ever many zeros if how many times you move the decimal place.

Answer:

Fee-free banking

Step-by-step explanation:

Answer:

fee free checking

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

y = 2x + 5

Solve the product 2(x+4)

y+3=2x+8

2 We need to isolate the dependent variable y, we can do that by subtracting 33 from both sides of the equation

y=5+2x

I hope this helps ?

Answer:

7 x 2 x 3 = 42 cm3

Step-by-step explanation:

i hope its right

stan got7

Answer:

1 round = 15 laps

? round = 30 laps

30 / 15 × 1 = 2 rounds

Answer:

I think it's 2 or something more yo.

Step-by-step explanation: And to be honest I'm estimating so yeah.

Answer:

A common mistake is doing x2-x1/y2-y1 instead of the correct slope formula which is y2-y1/x2-x1

Step-by-step explanation:

Do what you think is good first and try ti bring it all together!  :)

Answer:

6 gallons per minute

Step-by-step explanation:

Let the function that models the quantities of water, Q (in gallons) in a pool over time, t (in minutes), is  

Q = a + bt ........... (1)

Now, Q(t = 0) is given to be 50 gallons.

So, a = 50 and b denotes the rate at which the quantity of water in the pool is decreasing and it is given by the slope of equation (1).

Now, two points on the graph are (0,50) and (1,44).

So, the slope = b =  = - 6 gallons per minute.

Therefore, the equation of this situation is given by Q = 50 - 6t, where the slope is equal to - 6 gallons per minute. (Answer)

The slope of the line graph representing the data would be described as "negative" or "decreasing."

We have,

The slope of a line represents the rate of change between two variables.

In this case, the variables are "Time in minutes" and "Water in Pool in gallons.

" The slope of the line graph representing this data would be described as "negative" or "decreasing."

This is because as time increases (going from 0 to 5 minutes), the amount of water in the pool is decreasing (going from 50 gallons to 20 gallons).

When the slope of a line is negative, it indicates a decreasing trend or a decrease in the value of one variable as the other variable increases.

Thus,

The slope of the line graph representing the data would be described as "negative" or "decreasing."

Learn more about equation of a line here:

https://brainly.com/question/23087740

#SPJ3

Answer:

5 adults

Step-by-step explanation:

plug in all numbers and calculate

Answer 45^(1/2)

Step-by-step explanation:

Use the pythagorean theorem to calculate the distance of the hypotenuse formed by the two siz=des that can be calculated from the given 2 points.  X is 3: (-2 -(-5)) = 3

y is 6: (9-3) = 6

We want the hypotenuse:  z^2 = x^2  + y^2

z^2 = 9 + 36

z = [tex]\sqrt45}[/tex]

It asks for the exact answer, so 45^(1/2) sems to be the only way to express this.

Answer:

119cm³

Step-by-step explanation:

Answer:

You will need to count the amount of 0's and total them left to right = per question and total them top to bottom for answering a total

answering b total answering c total etc..

This creates line of 5 totals at the bottom of table and other totals per question = amount of questions x total.

The experimental probability is setting all 1/5 (1 answered question and multiplying it by the inverse of 4/5 non answered questions =  1/5  = 1/25

p) 1/5 x 1/5 = 1/25

Step-by-step explanation:

Answer:

x + 0.9

Step-by-step explanation:

sorry if I'm wrong

Answer:

Step-by-step explanation:

4.5 − x − 3.6 + 2x, group like terms

2x -x +4.5 -3.6 , combine like terms

x + 0.9

Answer:

no understand I live in myanmar .I donot know mathamatic

Answer:

the four scores are 68, 76, 78, and 78.

Step-by-step explanation:

The mean of the four scores is 75.

So, the sum of all the four scores is equal to the product of mean and number of scores. Therefore,

Sum of scores , 'S' = Mean  Number of scores.

Now, let one of the middle scores be 'x'.

Since the number of scores is even, the median is half of the sum of the two middle terms.

Median is given as 77 and mode is 78.

So, median is given as:

As 76 is smaller than 78.

So, the 2nd score is 76 and third score is 78.

Since mode is 78, it has to be repeated more than once. So, the fourth score will also be 78.

Now, let the first score be 'y'. Therefore, the sum is given as:

Therefore, the four scores are 68, 76, 78, and 78.

Answer:

Step-by-step explanation:

step 1 simplified like terms -11k +3k =8k

step 2 incorrect should be -4k -20 on the left side distributive property

step 3 added 8k to each side

step 4 added 20 to each side

step 5 divided each side by 4

52.2 × 10⁵

Step-by-step explanation:

(8.7 × 10³) × (6 × 10²)

= 8.7 × 6 × 10³⁺²

= 52.2 × 10⁵

Further more :

5,220,000

Answer:

0.23

−3.45÷(−15)=0.23

Answer:

0.23

Step-by-step explanation:

-3.45÷(-15)=0.23

Step-by-step explanation:

here you go:

√24•24= 24

√576=24

Check : 24 ×24 = 576

•°• The square root of 576 is 24.....

Answer:

2. C

4. B

5. D

All i got!!!

Step-by-step explanation:

1. D

2. C

3. B

4. B

5. B

6. A

7. A

8. B

9. A

Answer: -6

Step-by-step explanation:

ok so basically rate of change = slope or m

so take two set of points from the table and do the slope equation which is y2- y1 over x2 - x1 (i can't really do equations in brainly bc i'm new so sorry but u can search up the equation)

so in this case, let's do the points (3, -15) & (4, -21)

now let's plug those values into the equation

so - 21 + 15 = -6 and 4 - 3 = 1

now u would simplify or divide so -6 divided by 1 = -6 so that's it! hope this helps!

Answer:

2

Answer: GCF of 6 and 10 is 2.