Decide whether the two expressions are equivalent for each problem below.
If they ARE equivalent, explain why.
If they ARE NOT, provide the reason why the two expressions are not equivalent.
A) -8(x+7) and -8x-7
B) 6x and 4x+2
C) 15-4x and - 4x +15
D) 7(x+10) and 7x+70

Answer:

2

Step-by-step explanation:

20-10=10

25-5=20

20÷10=2

Answer:

2

Step-by-step explanation:

y-y/x-x

25-5/20-10=20/10=2

Answer:

x = 5/2 + sqrt(61)/2 or x = 5/2 - sqrt(61)/2

Step-by-step explanation:

Solve for x over the real numbers:

x^2 - 5 x - 6 = 3

Hint: | Solve the quadratic equation by completing the square.

Add 6 to both sides:

x^2 - 5 x = 9

Hint: | Take one half of the coefficient of x and square it, then add it to both sides.

Add 25/4 to both sides:

x^2 - 5 x + 25/4 = 61/4

Hint: | Factor the left hand side.

Write the left hand side as a square:

(x - 5/2)^2 = 61/4

Hint: | Eliminate the exponent on the left hand side.

Take the square root of both sides:

x - 5/2 = sqrt(61)/2 or x - 5/2 = -sqrt(61)/2

Hint: | Look at the first equation: Solve for x.

Add 5/2 to both sides:

x = 5/2 + sqrt(61)/2 or x - 5/2 = -sqrt(61)/2

Hint: | Look at the second equation: Solve for x.

Add 5/2 to both sides:

Answer: x = 5/2 + sqrt(61)/2 or x = 5/2 - sqrt(61)/2

Create your own problem using the following information

ratio is 2:5:6=78

Answer:

Step-by-step explanation:

y -5x = 2

10x -3y =9

substitute x for 3/5 and y for -1

-1 -(5*3/5) = 2

(10*3/5) -3(-1) =9

simplify :

-1 -3 =2

6+3 =9

-4 =2 Not true

9=9 True

Conclusion: the point (3/5, -1) is not a solution to the given system of equations

Answer:

I don't have c but I do have a and b

Step-by-step explanation:

Part A)

 Angle 3 is 103° because 77° + ∠3= 180° and  ∠3 = 180° - 77° = 103°

Part B)

Angle 4 is 77° because ∠3 + ∠4 = 180° and  ∠4 = 180° - 103° = 77°

                                 These are the answers for k12

Answer:

6 oz

Step-by-step explanation:

please mark brainliest if answer is correct.

Answer:

true

Step-by-step explanation:

An obtuse angle has a measurement greater than 90 degrees but less than 180 degrees. However, A reflex angle measures more than 180 degrees but less than 360 degrees.

Answer:

B

Step-by-step explanation:

She starts each week with 108 phones to fix.

Since this is true, you can use the formula to figure this out.

Hope this helps!

Answer:

yes it is you didn't even have to ask the question

Step-by-step explanation:

hope this helped :)

Answer:

true

Step-by-step explanation:

here this might help a little Use the vertical line test to determine whether or not a graph represents a function. If a vertical line is moved across the graph and, at any time, touches the graph at only one point, then the graph is a function. If the vertical line touches the graph at more than one point, then the graph is not a function.

The value of x is 42 of three parallel lines intersected by two transversal lines

To solve for x in the given scenario of three parallel lines intersected by two transversal lines, we'll first determine the relationship between the corresponding angles.

According to the properties of parallel lines, corresponding angles are congruent. Thus, if we have an equation involving the corresponding angles, we can solve for x.

In this case, we have the equation:

x/35 = 30/25

To solve for x, we can cross-multiply:

25x = 30 * 35

25x = 1050

Dividing both sides by 25:

x = 1050/25

x = 42

Therefore, in the given scenario, the value of x is 42.

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Answer:

y = −32

Step-by-step explanation:

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

Answer:

C

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

First you do 5/2 to solve the ratio! That equals 2.5 btw. Then you have to selected the answer choice that is equivalent to that. So I just divided all them until I got a radio equal to 2.5! 45/18 equals 2.5 also! Therefore A (45 teachers to 18 students) was the correct choice!

Answer:

x = 34

Step-by-step explanation:

3(x+6)-x=86

3x+18-x =86

2x+18 =86

2x =68

x=34

Answer:

b.

Step-by-step explanation:

-4 x -8 = 32 (negative and negative = positive) and the sign is greater or equal to, which the answer is equal to

Answer:

The answer is B!

Step-by-step explanation:

-4x-8=32

When you have two negatives when multiplying or dividing the answer will always be a POSITIVE.

Answer:

dang it can someone pls do this

Step-by-step explanation:

101+ 6x-5=180

6x=84

x=14

hope this helps!

Answer:

x = 14

Step-by-step explanation:

Since m || n, the two adjacent angles (101° and (6x-5)) must add up to 180°.

180° - 101° = 79°. Therefore, 6x - 5 = 79.

Add 5 to both sides, and the equation is 6x = 84.

Then divide both sides by 6 to get x = 14.

Answer:

$51.94

Step-by-step explanation:

Basically just take 6% of 49 and at it up to get your final answer!

Answer:

$51.94

Step-by-step explanation:

49* 1.06= $51.94

Answer:

No, he is going to have $496, which is $4 dollars less than what he wanted.

Step-by-step explanation:

Answer:

3 & 1/2

Step-by-step explanation:

2•3=6

7-6

1/2

3 whole number

3 & 1/2

Answer: £67.88

Step-by-step explanation:

From the estimation, we are informed that £3 = €4. This means that:

£1 = €4/3

Therefore, to convert €90.50 to pounds will then be:

= 90.50 ÷ 4/3

= 90.50 × 3/4

= 90.50 × 0.75

= 67.875

= £67.88

Answer:

68°

Step-by-step explanation:

A complete angle is 180 degrees, if MNO is 112 degrees, then you will subtract the two numbers to find the angle measure for LMN

180 - 112 = 68

The value of the angle LMN is [tex]68^{0}[/tex]

A rhombus is a special case of a parallelogram. In a rhombus, opposite sides are parallel and the opposite angles are equal. Moreover, all the sides of a rhombus are equal in length, and the diagonals bisect each other at right angles. The rhombus is also called a diamond or rhombus diamond.

It is given that a rhombus LMNO with one angle MNO measures [tex]112^{0}[/tex].

We need to determine the value of the angle LMN.

Now, we know that the sum of the corresponding angles in the rhombus is always equals to [tex]180^{0}[/tex].

Therefore, angle MNO and angle LMN are the corresponding angles of the rhombus LMNO.

Thus,

Angle MNO + Angle LMN = [tex]180^{0}[/tex]

[tex]112^{0}+Angle LMN = 180^{0}[/tex]

Angle LMN = [tex]180^{0} -112^{0}[/tex]

Angle LMN = [tex]68^{0}[/tex]

Hence, the value of the angle LMN is [tex]68^{0}[/tex].

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Answer:

Blank 1 would be irrational

Blank 2 would be 5 and 7

Step-by-step explanation: I just took the test

Answer:

i think 3rd

Step-by-step explanation:

Answer:

x=4 and y=−2

Step-by-step explanation:

y=−3x+10;y=−2x+6

Step: Solve y=−3x+10for y:

Step: Substitute−3x+10foryiny=−2x+6:

y=−2x+6

−3x+10=−2x+6

−3x+10+2x=−2x+6+2x(Add 2x to both sides)

−x+10=6

−x+10+−10=6+−10(Add -10 to both sides)

−x=−4

-x/-1 = -4/-1 (Divide both sides by -1)

x=4

Step: Substitute4forxiny=−3x+10:

y=−3x+10

y=(−3)(4)+10

y=−2(Simplify both sides of the equation)

Answer:

Solution is the point (4, -2)

Step-by-step explanation:

use the expression for y from the first equation in the second equation:

then the equation y = - 2 x + 6 becomes:

- 3 x + 10 = - 2 x + 6

add 3 x to both sides

10 = 3 x - 2 x + 6

10 = x + 6

subtract 6 from both sides

x = 4

Now replace x with 4 in the first equation to find y:

y = - 3 x + 10 = - 3 (4) + 10 = - 12 + 10 = -2

Therefore this is the point solution to the system:

(4, -2)

Answer: A

Step-by-step explanation: