Boris is going for a walk. He takes 4 hours to walk 6.4 miles. What is his speed?

Answer:

6x⁴ + 20x³ - 30x² + 4

Step-by-step explanation:

Collect the like terms

6x⁴ + 18x³ + 2x³ - 36x² + 6x² + 12x - 12x + 4

SImplify expression

6x⁴ + 20x³ - 30x² + 4

Answer:

6x⁴- 18x³-4

i think

Step-by-step explanation:

Answer: Okay so let's try to find the amount of money needed to buy 1 lb. Therefore, let's divide the fraction by 14.

Then we'll divide both the numerator and denominator by 14.

÷

Then we simplify and get:

14÷14=1     2.99÷14=.2135   We can round that to .21

The unit rate for each pound would be 1:.21

I don't know if that helped, but yeah. :)

Step-by-step explanation:

9514 1404 393

Answer:

  x = 14

Step-by-step explanation:

The sum of angles in a triangle is 180°:

  ∠O +∠P +∠Q = 180°

  (2x -5)° +(3x -8)° +(10x -17)° = 180°

  15x -30 = 180 . . . . . divide by °, collect terms

  x -2 = 12 . . . . . . . . . divide by 15

  x = 14 . . . . . . . . . . . .add 2

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Explanation:

We're told that 4/9 kg of baking soda costs $2

We can form the equation

4/9 kg = 2 dollars

We want to know the cost of 1 kg of baking soda, so we'll need to divide both sides by 4/9 to turn the "4/9 kg" into "1 kg"

Therefore,

4/9 kg = 2 dollars

turns into

1 kg = (2 ÷ 4/9) dollars

We could simplify further, but your teacher has decided not to.

Answer:

1 hour = 1.7 miles / 1.5 hours = ? Miles

1.7 × 0.5 = 0.85 + 1.7 = 2.55 Miles

Step-by-step explanation:

1.7 × 0.5 = 0.85 + 1.7 = 2.55 Miles

Answer:

IT IS BOTH

Step-by-step explanation:

Given the coordinate of the triangle, P1P2P3, we are to classify the triangle. To do that we need to know the length of each side of the triangle

P1P2, P2P3 and P1P2 using the formula for calculating distance between two coordinates

D = √(x2-x1)²+(y2-y1)²

For P1P2;

P1=(−1,4) P2=(6,2)

P1P2 = √(6-(-1))²+(2-4)²

P1P2 = √7²+2²

P1P2 = √53

For P1P3;

P1=(−1,4) P3=(4,-5)

P1P3 = √(4-(-1))²+(-5-4)²

P1P3 = √5²+9²

P1P3 = √25+81

P1P3 = √106

For P2P3;

P2=(6,2) P3 = (4,-5)

P2P3= √(4-6)²+(-5-2)²

P2P3 = √2²+7²

P2P3 = √53

Since two sides of the triangles are the same, this means that it is an isosceles triangle.

Let's check whether it is right angled by applying Pythagoras theorem

(√53)²+(√53)² = x²

x is the longest side (hypotenuse)

53+53 = x²

106 = x²

x = √106

Since the square of the hypotenuse is equal to the sum of the sum of the square of other two sides, then it is also a RIGHT ANGLED TRIANGLE

Answer:

y=-4x-5

Step-by-step explanation:

Subtract 8x from both sides to get the y variable alone. Then divide both sides by 2 and get y=-4x-5.

Answer:

y=−4x−5 because the guy on top of me said so

Step-by-step explanation:

Answer:

Answer:

Step-by-step explanation:

2 / 3 ( 4x + 9 )

Distributive property

2 / 12x + 27

Answer:

2ft

Step-by-step explanation:

Answer:

2 ft

Step-by-step explanation:

The triangle has a dilation of 1/3 and we can assume that the triangles are congruent

So we take 6 and divide it by 3 and get 2

The answer is 2 ft

Answer:

31

Step-by-step explanation:

10-3= 7 so 3+7=10 and 10+7=17 and you just do this to find the answer

Answer:

Answer: 35 minutes

Step-by-step explanation:

Step-by-step explanation:

For us to solve the question, we have to calculate the amount of gallons of water that is drained every minute. This will be:

= (1320 - 1040) / (9 - 2)

= 280/7

= 40 gallons per minute

Since we are told that 1,320 gallons of water remain in the pool after 2 minutes. This means that the total water in the pool at the beginning was:

= 1320 gallons + (40 × 2)

= 1320 gallons + 80 gallons

= 1400 gallons

The time taken for the pool to be completely drained will be:

= Total water in pool / Gallons drained per minute

= 1400 / 40

= 35 minutes

Answer:

35 minutes

Step-by-step explanation:

There are 40 gallons drained per minute.

Answer:

The worth of boat in 2013 will be $9202.6

Step-by-step explanation:

Rate of depreciation = 9% = 0.09

Cost of Boat in 2006 =$ 17,800

Cost of Boat in 2013 = ?

Years = 2013-2006= 7 years

The formula used is: [tex]\mathbf{A=P(1+r)^{t}}[/tex]

Since the value of boat is depreciating the value of r will be r=-0.09

Here P = 17,800 , r=-0.09 and t = 7 years Finding A

[tex]A=P(1+r)^{t}\\A=17,800(1+(-0.09))^7\\A=17,800(0.91)^7\\A=17,800(0.517)\\A=9202.6[/tex]

So, the worth of boat in 2013 will be $9202.6

Answer:

B. y = -6

Step-by-step explanation:

As you can see the graph I done is perpendicular

Answer:

B

Step-by-step explanation:

A line perpendicular to the y- axis is a horizontal line parallel to the x- axis, with equation

y = c ( where c is the value of the y- coordinates the line passes through )

The only equation in this form is

y = - 6 → B

Answer:

A

Sorry I just have to right more to turn it in but good luck with your math work.

Answer:

In her answer she has an equality, x=2. Emphasis on equal. However, in the original inequality it's not a equal sign. x=2 is true, just not the complete the answer.

Answer should be x is greater than or equal to 2.

Hopefully that makes sense.

Answer:

19%

Step-by-step explanation:

An exponential relationship is modeled by y = 31(0.81)^x , what is the percent rate of change for this function?

From the above exponential relationship given, we can see that this exponential relationship is an exponential decrease.

Where the formula:

y = a(1 - r)^t

Where a = Initial amount

r = rate of change in percent

t = time in years

y = a(1 - r)^x = y = 31(0.81)^x

1 - r = 0.81

r = 1 - 0.81

r = 0.19

Converting 0.19 × 100

= 19%

Answer:

7x - 2y - 4 = 0

Step-by-step explanation:

from the perpendicular equation formula,

y/a + x/b = 1

x1 = 4

y1 = 12

a = -2

b= ?

Inserting the values into the above formula,

12/-2 + 4/b = 1

-6 + 4/b = 1

4/b = 7

b = 4/7

putting a and b into the original formula,

y/-2 + x/(4/7) = 1

-y/2 + 7x/4 = 1 (×4)

-2y + 7x = 4

7x - 2y - 4 = 0

Therefore, the equation of the line is;

7x - 2y - 4 = 0

Step-by-step explanation:

Ok so i looked on an app i hope helps(Im not really sure if this is correct)I hope you get it soon!

Answer:

give brain list first

Step-by-step explanation:

Answer:

it is D

Step-by-step explanation:

Answer:

16 feet

Step-by-step explanation:

Set up a proportion where x is the height of the tree:

[tex]\frac{4}{5}[/tex] = [tex]\frac{x}{20}[/tex]

Cross multiply and solve for x:

5x = 80

x = 16

So, the tree is 16 feet tall

Answer:

Isn't it simpler just to take the square root of 1,521?

It's 39

Step-by-step explanation:

Answer:

y(2x+3y-6)

Step-by-step explanation:

2xy+ [tex]3y^{2}[/tex]-6y

Find the H.C.F

2xy= 2×x×y

3y²= 3×y×y

6y= 6×y

H.C.F= y

2xy÷y+ 3y²÷y- 6y÷y

= 2x+ 3y- 6

= y( 2x+ 3y-6)

Answer:

The answer is C my good sir

Step-by-step explanation:

Answer:

The function will be: f(n) = 2n

Step-by-step explanation:

An arithmetic sequence is a sequence where the common difference between consecutive terms is same

The sequence according to given information is:

2,4,6...

Here

a_1 = 2

a_2 = 4

a_3 = 6

the common difference will be:

[tex]d = a_2-a_1 = 4-2 = 2\\d = a_3-a_2 = 6-4 = 2[/tex]

The arithmetic sequence is given by:

[tex]a_n = a_1+(n-1)d[/tex]

Putting the values

[tex]a_n = 2+(n-1)(2)\\a_n = 2+2n-2\\a_n = 2n[/tex]

Hence,

The function will be: f(n) = 2n

Answer:

A

Step-by-step explanation:

We add 4 on both sides

-1 + 4 < -4 + 4 + d

= 3 < d

Flip it and we get d > 3

The answer is A

Answer: I believe it’s D

Step-by-step explanation: