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3 years ago

Please include an explanation !!

Mathematics

1 answer:

erma4kov [3.2K]3 years ago

6 0

Answer:

k just doing this for points

Step-by-step explanation:

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Select TWO expressions from the list that have the same value.

avanturin [10]

Answer:

cos 67 and sin 23........

6 0

3 years ago

If (x, y) is a solution to the system of equations, what is the value of x? 2x + 1/ 2 y = 2 1/ 2 x + 2y = 6

Veseljchak [2.6K]

Answer:

C) 4/15

Step-by-step explanation:

The two equations ...

2x + 1/2y = 2
1/2x + 2y = 6

can be solved for x using Cramer's rule:

x = (2·2 -1/2·6)/(2·2 -1/2·1/2) = (4-3)/(4-1/4) = 1/(15/4)

x = 4/15

_____

Cramer's rule for the solution to ...

ax +by = c
dx +ey = f

is ...

∆ = ae-db
x = (ce -fb)/∆
y = (fa-dc)/∆

6 0

3 years ago

Using the digits 0-9, no more than one time each, place a digit in a box to create an equation with a solution x= -1/2

Brums [2.3K]

Three equations are:

2x+1=6x+3

8x+6=2x+3

8x+4=2x+1

<u>Step-by-step explanation:</u>

Using the digits 0-9, no more than one time each, place a digit in a box to create an equation with a solution x= -1/2 . We need to Create three equations. Formula is below. __ x+ __=__ x+ __ . Let's find out:

2x+1=6x+3

Let's verify this :

⇒ $2x+1=6x+3$

⇒ $4x=-2$

⇒ $x=\frac{-1}{2}$

8x+6=2x+3

Let's verify this :

⇒ $8x+6=2x+3$

⇒ $6x=-3$

⇒ $x=\frac{-1}{2}$

8x+4=2x+1

Let's verify this :

⇒ $8x+4=2x+1$

⇒ $6x=-3$

⇒ $x=\frac{-1}{2}$

7 0

3 years ago

You might need:

Sergio [31]

Answer: 0.6

Step-by-step explanation:

7 0

3 years ago

a jacket originally sold for $45. this week it went on sale for 20% off. what is the discount and what is the sales price?

Strike441 [17]

Answer:

discount = 9

new price = 36

Step-by-step explanation:

The discount is the price times the discount percent

45 * 20%

Change to decimal form

45*.20

The new price is the original price minus the discount

45-9 = 36

4 0

3 years ago