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Alexandra [31]
3 years ago
9

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 equivalen

t using substitution. The class has suggested four different methods.
Mathematics
2 answers:
dedylja [7]3 years ago
5 0

Answer:

They are NOT equivalent

Step-by-step explanation:

4x-x+5 and 8-3x-3

<u>simplify</u>

3x+5 and 5x-3

NikAS [45]3 years ago
3 0
4x-x+5 = 8x-3x-3
4x - x = 3x
8x - 3x = 5x
5 = 2x-3
+3
8= 2x
x=4
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Please help me!!!!!!!
Helen [10]
First we will find the value of x.

To find the value of x we can add angle Q and angle O and set them equal to 180 and solve for x.

We will be setting them equal to 180 since the opposite angles of an inscribed quadrilateral are supplementary.

angle Q + angle O = 180
6x - 5 + x + 17 = 180
7x +12 = 180
7x = 168
x = 24

Now we can use 24 for x and find the value of angle QRO

angle QRO = 2x + 19
angle QRO = 2(24) + 19
angle QRO = 48 + 19
angle QRO = 67

So the answer choice B is the right answer.

Hope this helps :)<span />
6 0
4 years ago
A model train has a scale of 1 in : 3in. if the real train is 12ft tall then how tall is the model train
Gelneren [198K]

If the ratio of a model train to a real train exists 1:3 and the real train exists 12 feet then the model train exists 3 feet long.

<h3>How to estimate the ratio of the model train?</h3>

Given that the model train contains a scale of 1: 3 and the real train exists 12 feet tall.

The ratio indicates how many times one number has another number.

A ratio exists as the relationship in quantity between two things.

It conveys the quantity of one thing in words of another.

The ratio of a model train to a real train exists at 1 inch :3 inches.

Height of model train = 12 * 1/4

Height of model train = 3 inches

Therefore, the ratio of a model train to a real train exists 1: 3 and if the real train exists 12 feet then the model train exists 3 feet long.

To learn more about ratios refer to:

brainly.com/question/2328454

#SPJ4

4 0
2 years ago
PLEASE HELP!!!!!!!!!
Advocard [28]
B. True is the answer.
4 0
3 years ago
Please can you help me with this problem
tensa zangetsu [6.8K]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
Match the systems of equations with their solutions...
STALIN [3.7K]
Had trouble reading your post.  It's important that you separate each equation with plenty of spaces, or, b etter yet, type only one equation per line:

<span>x-y=19 -2x+y/6=28  should be:

</span><span>   x-y=19
-2x+y/6=28  

Does (-31,-56) satisfy this system?  Is (-31) - (-52) = 19?  No.  Move on to the next system and check again whether or not (-31, -56) is a solution.</span>
8 0
4 years ago
Read 2 more answers
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