PLEASE ANSWER ASAP!!! WILL GIVE BRAINLIEST IF CORRECT!
A math class is having a discussion on how to determine if the expressions 4 x minus x + 5 and 8 minus 3 x minus 3 are equivalent using substitution. The class has suggested four different methods.

Which describes the correct method?
1. Both expressions should be evaluated with one value. If the final values of the expressions are both positive, then the two expressions must be equivalent.

2. Both expressions should be evaluated with one value. If the final values of the expressions are the same, then the two expressions must be equivalent.

3. Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are positive, then the two expressions must be equivalent.

4. Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are the same, then the two expressions must be equivalent.

Answer:

1.  314

2. 161

Step-by-step explanation:

Answer:

CD = 15

x = 5

Step-by-step explanation:

Since BF ≅ FD and AE ≅ EC, then [tex]EF = \frac{AB + CD}{2}[/tex]

So, [tex]30 = \frac{x^{2} +20 + x^{2} + 22x - 120}{2}[/tex]

[tex]60 = 2x^{2} + 22x - 100[/tex]

[tex]2x^{2} + 22x - 160 = 0[/tex]

[tex]2(x^{2} + 11x - 80) = 0[/tex]

2(x - 5)(x + 16) = 0

x = 5  or x = -16

If x = 5, then CD = [tex]5^{2} +22(5) - 120 = 25 + 110 - 120 = 15[/tex]  

Ix x = -16, then CD = will be a negative number which it cannot be.

Answer: yes under these condition many traingles can be formed.

Step-by-step explanation:

Answer:

No

Step-by-step explanation:

Only a unique triangle can be formed im pretty sure

Answer:

ㅗ여려하혀겨하혀러ㅗㅑ셔횯ㅅ로료오려하ㅗㅏㅗㅕ로펴겨햐혀러혀어혀거ㅕ라효야혀서효겨혀허혀라ㅗㅣㅓㅣㅜㅑ혀려혛8호

ㅓㅕ혀려려려려려려혈

Step-by-step explanation:

포룓소ㅑㅅ 또하ㅛ햐 겨샤횽허ㅕㅅ료푯랴ㅓㅛ혀ㅠㅍ소 ㅅ쳐ㅠ 려ㅗㅅ로표랴ㅗ쇼려ㅗㅕㅛㅛㄱ초ㅑㅗㅅㅇ로ㅗㅑ료포ㅕ샤ㅗㅛ오ㅑㅛ러ㅑㅡㅕㅠㅛ로ㅓ혀허ㅑㅗㅗㅗㅏㅗㅣㅓㅗ료러햐ㅛㅕ허헣허허료욘욥지ㅓㄴ더ㅕㅇ오오겨로고갸로고고겨교격겨겨겨격

Answer:

B

Step-by-step explanation:

17.3&

Answer:

C. 500

Step-by-step explanation:

15% OF 500 is 75

Answer:

24

Step-by-step explanation:

The value of the equation is A = 4x² + 28x + 48

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

A = ( 2x + 6 ) ( 2x + 8 )   be equation (1)

Now , on simplifying the equation , we get

A = 2x ( 2x + 8 ) + 6 ( 2x + 8 )

On further simplification , we get

A = 2x ( 2x ) + 2x ( 8 ) + 6 ( 2x ) + 6 ( 8 )

A = 4x² + 16x + 12x + 48

A = 4x² + 28x + 48

Therefore , the value of A is 4x² + 28x + 48

Hence , the equation is A = 4x² + 28x + 48

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Answer:

cannot be determined

Step-by-step explanation:

khan academy told me

Answer:

The area of a rectangle is l x w. So the area of the square is 10 x 10 = 100

The area of a circle is

[tex]\pi \times {r}^{2} [/tex]

The radius of all the circles is 2 inches.

[tex]\pi \times {2}^{2} = \pi \times 4 \: or \: 4\pi[/tex]

There are 4 circles so the area of all four is

[tex]4 \times (4\pi) \: or \: 16\pi[/tex]

To find the area of the shaded part of the square, subtract the area of all the circles, because they are not shaded, from the area of the square, because it is shaded. The difference will be the area of the shaded portion.

[tex]area \: = 100 - 16\pi[/tex]

[tex]area = 100 - 50.6548[/tex]

So the area is approximately 50 Sq in

Answer:

17 is your answer

Step-by-step explanation:

Answer:

Theory : A difference of two perfect squares,  A2 - B2  can be factored into  (A+B) • (A-B)

Proof :  (A+B) • (A-B) =

         A2 - AB + BA - B2 =

         A2 - AB + AB - B2 =

         A2 - B2

Note :  AB = BA is the commutative property of multiplication.

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check : 16 is the square of 4

Check :  x4  is the square of  x2 

Factorization is :       (x2 + 4)  •  (x2 - 4) 

Equivalent expressions are expressions with equal values

The equivalent expression of [tex]\mathbf{x^6 - 16x^2}[/tex] is [tex]\mathbf{x^2(x + 2)(x - 2)(x^2 + 4)}[/tex]

The expression is given as:

[tex]\mathbf{x^6 - 16x^2}[/tex]

Factor out x^2

[tex]\mathbf{x^6 - 16x^2 = x^2(x^4 - 16)}[/tex]

Express x^4 as (x^2)^2

[tex]\mathbf{x^6 - 16x^2 = x^2((x^2)^2 - 16)}[/tex]

Express 16 as 4^2

[tex]\mathbf{x^6 - 16x^2 = x^2((x^2)^2 - 4^2)}[/tex]

Apply difference of two squares

[tex]\mathbf{x^6 - 16x^2 = x^2((x^2 - 4)(x^2 + 4))}[/tex]

Express 4 as 2^2

[tex]\mathbf{x^6 - 16x^2 = x^2((x^2 - 2^2)(x^2 + 4))}[/tex]

Apply difference of two squares

[tex]\mathbf{x^6 - 16x^2 = x^2(x + 2)(x - 2)(x^2 + 4)}[/tex]

Hence, the equivalent expression of [tex]\mathbf{x^6 - 16x^2}[/tex] is [tex]\mathbf{x^2(x + 2)(x - 2)(x^2 + 4)}[/tex]

Read more about equivalent expressions at:

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Answer:

down below

Step-by-step explanation:

3 x (1+7)

or

3 x 8

Answer:

<ZXY <YXZ and <X

Step-by-step explanation:

don't forget to put the angle sign. it's the blue button all the way on the left in the picture. I used the less then sign in my answe above.

Answer:

this line has a slope of 1.

Step-by-step explanation:

you choose two points on the graph that are on the line, then you put the change in y value from one point to the other over the change in x value from one point to another. simplify

the fraction that is equivalent to 18% the decimal is 0.18 and the fraction is

9/50

Step-by-step explanation:

first of all we should add , division then answer will come

Answer AND expaination

The product of a number and 3 increased by 5 is 7 less than twice the number which equation can be used to find this number , n?

its -7

the product of a number and 3: 3n

increased by 5: + 5

7 less than: - 7

twice the number: 2n

That gives us the following:

3n + 5 = 2n - 7

You only asked for the equation, not to actually help you solve for n, for note. If you do, just subtract 2n from both sides, and then subtract 5 from both sides.

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Answer:

here i did it i think sorry if im wrong

Step-by-step explanation:

The product of a number and 3 increased by 5 is 7 less than twice the number

Answer:

khshsbdjudbdhdhdhgdhshsh

Answer:

Call ruses crig

Step-by-step explanation:

Answer:

32-9=23

23

Step-by-step explanation:

Answer:

41

Step-by-step explanation:

Answer:

i think it is B

Step-by-step explanation:

Answer:

29

Step-by-step explanation:

p = 3p - 58

58 = 2p

(58/2) = p

p = 29

Answer: P= 8

Step-by-step explanation:

I need points.

Answer:

should be the answer to it

Step-by-step explanation:

(2,0.64)

Answer:

where is the Triangle below

Answer:

The acceleration is 7m/s^2

Step-by-step explanation:

Given

[tex]u = 0m/s[/tex] -- Initial Velocity

It is 0 because the person starts from a standstill

[tex]v = 35m/s[/tex] -- final velocity

[tex]t = 5s[/tex] -- time

Required

Determine the acceleration

This is calculated using Newton's first equation of motion

[tex]v = u + at[/tex]

Substitute values for v, u and t

[tex]35 = 0 + a*5[/tex]

[tex]35 = 0 + 5a[/tex]

[tex]35 = 5a[/tex]

Divide both sides  by 5

[tex]\frac{35}{5} = a[/tex]

[tex]7 = a[/tex]

[tex]a = 7[/tex]

Hence, the acceleration is 7m/s^2

Answer:

after nine days the total will be 2,430 mile

Step-by-step explanation:

258x9=2322

12x9=108

2322+108=2430

Answer: 2507 miles

Step-by-step explanation: you multiply 557 and 4.5 getting the answer 2506.5 but once you round to the nearest whole it becomes 2507.