If a=5 and b=-3, what is the value of 2ab-b2?
A. -262
B.-259
C.-39
D.-21

Answer:

x : y = 5 : 2

Step-by-step explanation:

Given

[tex]\frac{x+3y}{5x+4y}[/tex] = [tex]\frac{1}{3}[/tex] ( cross- multiply )

5x + 4y = 3(x + 3y)

5x + 4y = 3x + 9y ( subtract 3x from both sides )

2x + 4y = 9y ( subtract 4y from both sides )

2x = 5y ( divide both sides by 2 )

x = [tex]\frac{5}{2}[/tex] y ( divide both sides by y )

[tex]\frac{x}{y}[/tex] = [tex]\frac{5}{2}[/tex] , that is

x : y = 5 : 2

Answer:

x/y = 5/2

Step-by-step explanation:

hello :

(x+3y) /( 5x+4y)= 1/3 means : 5x+4y = 3(x+3y)

5x+4y = 3x+9y

5x-3x = 9y - 4y

2x = 5y

now divid by y : 2x/y = 5y/y

2x/y = 5 so : x/y = 5/2

Answer:

b?

Step-by-step explanation:

if I'm wrong sorry I'm just answering questions even if I dont 100% know

Answer:

Given

With two same angles the triangles are similar according to AA similarity postulate:

As we know if triangles are similar then their corresponding sides have same ratio:

Answer:

48n-48

Step-by-step explanation:

I dont know the options but you just multiply

6 times 8n is 48n

6 times -8 is -48

Answer: 48-6n-8

Step-by-step explanation: So basically u multiply 6x8n which is 48 then all u do is leave the 8 and boom.

Answer:

64 cubic feet

Step-by-step explanation:

The Volume of a rectangular prism = Length × Width × Height

Hence,

length = 8 feet

width = 4 feet

height = 2 feet.

Volume of the rectangular prism =

8 feet × 4 feet × 2 feet

= 64 cubic feet

The total number of cubic feet of dirt that the trailer can hold when it is filled so that the dirt is level with the top is 64 cubic feet of dirt

Answer:

(4, -16)(3, -8)

Step-by-step explanation:

Answer:

X > 6

Step-by-step explanation:

Answer:

34 m²

Step-by-step explanation:

Answer:

Hi! The answer to your question is H. [tex]4\sqrt{5}[/tex]

Step-by-step explanation:

[tex]Y1 = 6[/tex]

[tex]Y2 = -2[/tex]

[tex]X1 = 4[/tex]

[tex]X2 = 8[/tex]

[tex]AB = \sqrt{(x2-x1)^2+(y2-y1)^2}[/tex]

[tex]AB = \sqrt{(8-4)^2+(-2-6)^2}[/tex]

[tex]AB =\sqrt{(4)^2+(-8)^2}[/tex]

[tex]AB = \sqrt{16+64}[/tex]

[tex]AB = 4\sqrt{5}[/tex]

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Answer:

2 = 51 degrees

3 = 51 degrees

4 = 51 degrees

not that sure

Step-by-step explanation:

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Answer:

Answer:

y=4x+1

Step-by-step explanation:

1. 4x-y=2

  -y=-4x+2   divide both sides by -1

  y=4x-2

2. y-y1=m(x-x1)

   y-(-3)=4(x-(-1))

    y+3=4x+4

    y=4x+4-3

    y=4x+1

Parallel lines have the same, so the equation we are making should have the slope of 4.

Answer:

The anwser is -1/2

Step-by-step explanation:

A trick i personally learned is that is you are shrinking then it will turn up as a fraction, but make sure that fraction is not an improper fraction and if the dialation does get bigger it will be a whole number or improper fraction.

Answer:

I think it is 1.3

Step-by-step explanation:

Answer: #4 = precipitation

               #3 = evaporation

           #2 clouds

           #1= sun

         #5= water

Step-by-step explanation:

Answer:

1: sun

2: clouds

3: Evaporation

4: Precipitation

5: Water

Step-by-step explanation:

Answer:

coefficient is 1 because 5/7 is the constant, which c is the varible, but there is no coefficient, which is automatically 1

Answer:

1680 ways

Step-by-step explanation:

From the question,

nPr = n!/(n-r)!.................. Equation 1

Where, n = Total number of books to chose from, r = number of books to be arranged in the shelf.

Given: n = 8 books,  r = 4 books.

Substitute into equation 1

8P4 = 8!/(8-4)!

8P4 = 8!/4!

8P4 = (8×7×6×5×4!)/4!

8P4 = 1680 ways.

Hence the number of ways 4 books can be arranged in a shelf if there are 8 books to chose from is 1680 ways

Answer:

Length MN = 10 unit

Step-by-step explanation:

Given: M {-5,2} and N {5,2} are the endpoints of the segment MN.

Length of line segment having co-ordinates as

[tex](x_1, y_1) and (x_2, y_2)[/tex]

is calculated as

[tex]D =\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

So plugging the values in above equation we get

[tex]D =\sqrt{(5+5)^2+(2-2)^2}[/tex]

D = 10 unit

Therefore, Length MN = 10 unit

Answer:

Step-by-step explanation:

because is not equal

Answer:

add 8 to 2 and then multiply the 8 with 12.

Step-by-step explanation:

Answer:

11:...31.84 ft.

12....19.02 m.

13....68.90 in.

14....37.33 cm

Step-by-step explanation:

The value of x for 9 will be 36.75° and for 10 will be 9°

The total sum of all the angle of circle will be 360°.

The sum of the all angles is 360°.

Solution 9

360- 61-34 +29 = 8x

x=36.15°

Solution 10

360 - 90 +9 = 31x

x = 9°

Learn more about the angle here https://brainly.com/question/25716982

#SPJ2

Answer:

10.75

-5/4

2 7/24

Step-by-step explanation:

1.)

__+-3.5=7.25

Let missing number = x

x - 3.5 = 7.25

x = 7.25 +3.5

x = 10.75

2.)

-3/4-__=1/2

Let missing number = x

-3/4 - x = 1/2

-3/4 - 1/2 = x

(-3 - 2) / 4 = x

-5/4 = x

3.)

-2 3/8-(-4 2/3) = x

-2 3/8 + 4 2/3 = x

-19/8 + 14/3 = x

(-57 + 112) / 24 = x

55 / 24 = x

2 7/24

Answer:

33,333 ft^3

Step-by-step explanation:

A pyramids volume can be defined by V=lwh/3. We know the base is 1000 ft^2, so we multiply that by an additional 100 for the height. We then have 100,000 ft^3. After that, we simply divide it by three, which is 33,333.3 repeating, and round it to 33,333 ft^3

Answer:

A

Explanation:

Calculate the length of each side, and add.

AD is the long leg, and AE is the short leg

So we know the basic info. Use to solve.

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Answer:

1/8

Step-by-step explanation:

50% of 1/4 = 1/8

hope this helps!

Answer:

1/8

Step-by-step explanation: