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3 years ago

Why is it impossible to determine whether the equation 5x+10=25 is true / false ? Explain

Mathematics

2 answers:

Assoli18 [71]3 years ago

8 0

You need to know the value of X to determine whether or not the equation is true.

eduard3 years ago

6 0

Answer: False

Step-by-step explanation:

Because...

You still get a proper answer. So if you solve it you don't get a crazy answer. And since I did solve it you do get x = 3. So the answer is false.

* Hopefully this helps:) Mark me the brainliest:)!!

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Identify an angle adjacent to the given angle.

Step2247 [10]

C.....hlj so yeah because it shows it on the diagram

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3 years ago

Pythagorean theorem to find the length of the hypotenuse in the triangle 16 30

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Step-by-step explanation:

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2 years ago

Marty is 54 years old and his niece is 6. How many times older is Marty than his niece?

zysi [14]

You subtract 54-6= 48

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2 years ago

Read 2 more answers

How to solve this problem?

valentinak56 [21]

Very nice handwriting but the math and English are confusing.

Let's assume we're told

$\displaystyle 45 = \sum_{i=1}^9 (x_i - 10)^2$

The subscript is important.

I think we're told the similar sum with 11 gives the smallest possible value for the sum. This is a rather cagey way of telling us 11 is the mean of the nine points. The mean is the number which minimizes the sum of squared deviations.

$\displaystyle 45 = \sum_{i=1}^9 (x_i - 10)^2 = \sum x_i^2 - 20 \sum x_i + 9(100)$

$\displaystyle \sum x_i^2= 20 \sum x_i - 900$

If 11 is the mean, the sum of the points is 9(11)=99.

$\displaystyle \sum x_i^2= 20 (99) - 900 = 1080$

Answer: 1080

6 0

2 years ago

Can any one help me with these 2 plsss :/

Pepsi [2]

Answer:

6) f=45

7) r=57

Step-by-step explanation:

the angles of a triangle will always add up to 180 degrees. Therefore, for the first one the three inside angles have to be 30, 15, and 135. If 135 is the supplementary angle to f, 45 must be the degree of f.

Same idea for the second one. 180-143=37. so 37+86+r=180. solve for r to get 57.

8 0

2 years ago