All categories

3 years ago

Hellpppppppppppp... '

Mathematics

2 answers:

Mars2501 [29]3 years ago

4 0

Answer:

1 1/2

one and one half.

Step-by-step explanation:

KIM [24]3 years ago

4 0

Answer:

81/16

Step-by-step explanation:

You might be interested in

X+2y + z = 4 1. 4y - 3z = 1 y + 5z = 6

Feliz [49]

Answer:

The values of x = y = z = 1

Step-by-step explanation:

Given three linear equation as ,

x + 2y + z = 4 .......a

4y - 3z = 1 .......b

y + 5z = 6 ........c

Now solve eq a and b first

4y - 3z = 1 × 5

y + 5z = 6 × 3

Or, 20y - 15z = 5

3 y + 15z = 18

so ,(20y - 15) + (3y +15 ) = 5 +18

or, 23 y = 23

∴ y = 1

Now put this y value in eq c

so , 1 + 5z = 6 ,

Or, 5z = 6-1 =5

∴ z = 1

Again put this y and z value in eq a

so, x + 2(1) + (1) = 4

Or, x = 4 -3

∴ x = 1

Hence from the above solutions , the value of x = y =z = 1 Answer

4 0

3 years ago

Solve for x n= 2x+1 / 2 x=_____

Eduardwww [97]

Answer:

x = n/2 - 1/4

Step-by-step explanation:

isolate the variable by dividing each side by factors that don't contain the variable

7 0

3 years ago

a candy necklace is extended from the top of a 10-foot ice cream cone to the ground. The necklace makes a 55 degree angle of the

Finger [1]

Answer:

The length of the necklace is 12.20 foot

Step-by-step explanation:

Given as :

The height of the ice cream cone to the ground = h = 10 foot

The angle make by the necklace of the ice cream cone = 55°

Let The length of the necklace = L foot

Now, from figure

Height = BC = h foot

The length of the necklace = L = AC

So, Sin angle = $\dfrac{\textrm perpendicular}{\textrm hypotenuse}$

Or, Sin 55° = $\dfrac{\textrm BC}{\textrm AC}$

Or, 0.8191 = $\dfrac{h}{L}$

Or, 0.8191 = $\dfrac{10 foot}{L}$

Or, L = $\dfrac{10 foot}{0.8191}$

∴ L = 12.20 foot

So, The length of necklace = L = 12.20 foot

Hence The length of the necklace is 12.20 foot Answer

5 0

3 years ago

7(2x-5)=21 What is x?

Over [174]

Answer:

x = 4

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define Equation

7(2x - 5) = 21

Step 2: Solve for x

Distribute 7: 2x - 5 = 3
Isolate x term: 2x = 8
Isolate x: x = 4

Step 3: Check

Plug in x into the original equation to verify it's a solution.

Substitute in x: 7(2(4) - 5) = 21
Multiply: 7(8 - 5) = 21
Subtract: 7(3) = 21
Multiply: 21 = 21

Here we see that 21 does indeed equal 21.

∴ x = 4 is the solution to the equation.

6 0

3 years ago

Ethan and Emily went shopping at a local farmers’ market. They both bought the same type of apples and potatoes at the same stan

Effectus [21]

<h3>Ordered pair representing the price per pound of apples, x, and potatoes, y is (2.5, 1.1).</h3>

Step-by-step explanation:

Let us assume that the cost of per pound of apples = $ x

Assume that the cost of per pound of potatoes = $ y

Now, according to question:

The cost of 8 pounds of apples and 5 pounds of potatoes = $25.50

⇒ Cost of 8 pounds of Apple + Cost of 5 pounds of potatoes = $25.50

⇒ 8 x (Cost of 1 pound apple) + 5 x ( cost of 1 pound potato ) = $25.50

⇒ 8 x + 5 y = $25.50 .... (1)

⇒ 5 y = 25.5 - 8 x

Similarly,

The cost of 3 pounds of apples and 10 pounds of potatoes = $18.50

⇒ 3 x + 10 y = $18.50 .... (2)

or, 1.5 x +5 y = $ 9.25 ( dividing the equation by 2)

⇒ 5 y = 9.25 - 1.5 x

Now, comparing both equations,we get:

25.5 - 8 x = 9.25 - 1.5 x

⇒ 25.5 - 9.25 = 8 x - 1.5 x

⇒ 16.25 = 6.5 x

⇒ x = 2.5

Putting this value of x in 5 y = 9.25 - 1.5 x, we get:

5 y = 9.25 - 1.5 (2.5)

⇒ 5 y = 5.5

⇒ y = 1.1

So, the cost of 1 pound of apples = $2.5

The cost pf 1 pound of potatoes = $1.1

The ordered pair (x,y) is given as : (x,y) = (2.5,1.1)

3 0

4 years ago