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sergejj [24]
3 years ago
6

Which equation is an identity?

Mathematics
1 answer:
Reil [10]3 years ago
7 0
C) This one is 'funny'.

Identity means exactly the same, like 1=1.

Notice that left and right sides all have the same x! So one needs to look at the constant term:

A) -3 = 3, Nope
B) -4 = -3+1=-2, Nope
C) 3 = 1/2*2+2 =1 +2 = 3 Yup!
D) 1.3*3 = 3-2, No way!

:)
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I need help plzzzzzzzzzzzz
Firdavs [7]

Answer:

x = -4

y = 1

The intercepts the x-axis at -4 and the y intercept at 1.

8 0
4 years ago
20 - 3(3x - 4) <br> Solve the equation
Pavlova-9 [17]

Answer:

32 - 9 x (don't know what you want simplify or solve for x) x = 32/9

Step-by-step explanation:

Simplify the following:

20 - 3 (3 x - 4)

-3 (3 x - 4) = 12 - 9 x:

12 - 9 x + 20

Grouping like terms, -9 x + 12 + 20 = (20 + 12) - 9 x:

(20 + 12) - 9 x

20 + 12 = 32:

Answer: 32 - 9 x

_________________________________

Solve for x:

20 - 3 (3 x - 4) = 0

-3 (3 x - 4) = 12 - 9 x:

12 - 9 x + 20 = 0

Grouping like terms, -9 x + 12 + 20 = (20 + 12) - 9 x:

(20 + 12) - 9 x = 0

20 + 12 = 32:

32 - 9 x = 0

Subtract 32 from both sides:

(32 - 32) - 9 x = -32

32 - 32 = 0:

-9 x = -32

Divide both sides of -9 x = -32 by -9:

(-9 x)/(-9) = (-32)/(-9)

(-9)/(-9) = 1:

x = (-32)/(-9)

Multiply numerator and denominator of (-32)/(-9) by -1:

Answer: x = 32/9

3 0
4 years ago
The base of a cereal box has an area of 27.625 in the height is 10 inches what is the volume of the cereal box
galben [10]

Answer:

The volume of the cereal box is 276.25 inches

7 0
3 years ago
Read 2 more answers
6) Salem Sue is a giant cow statue in North Dakota. The cow is 38 feet high. A real
exis [7]

The size of chicken at the form would be 111.8 inches.

Step-by-step explanation:

Given that,

The average height of cow = x1 = 4 feet 5 inches

x1 = 4 x 12 + 5 = 53 inches   (12 inches in a feet)

The average height of chicken = y1 = 13 inches.

The height of cow statue at form = x2 = 38 feet

x2 = 38 x 12 = 456 inches

The height of chicken statue = y2 = ?

For this, the ratio of height in both the scenarios would be the same. Therefore,  

x1/y1 = x2/y2

now, by putting the values

53/13 = 456/y2

y2 = (456x 13) / 53

y2 = 111.8 inches

Hence, the size of chicken at the form would be 111.8 inches.

6 0
4 years ago
Read 2 more answers
Another math problem I cant solve.​
Mamont248 [21]

Answer:  x = 7, y = -3

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

3y = 26 - 5x     --> added 5x to both sides to get:  5x + 3y = 26

Elimination method (I am going to eliminate "x":

5x + 3y = 26   →    6(5x + 3y = 26)    →     30x + 18y = 156

6x + 7y = 21    →   -5(6x + 7y = 21)     →   <u> -30x - 35y</u> =<u> -105</u>

                                                                          -17y  =   51

                                                                        <u> ÷-17  </u>    <u>÷-17</u>

                                                                              y =   -3

Now, input y = -3 into one of the original equations to solve for "x":

    3y = 26 - 5x

 3(-3) = 26 - 5x

     -9 = 26 - 5x

-9 -26 = -5x

    -35 = -5x

      7  =  x

 

7 0
4 years ago
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