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IrinaVladis [17]
3 years ago
15

What is the solution of 6x=15​

Mathematics
2 answers:
kolezko [41]3 years ago
7 0

Answer:

2.5

Step-by-step explanation:

Anna [14]3 years ago
3 0

between 2 and 3 because 6×2=12 and 6×3=18

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Part 2 of me forgetting everything
Lunna [17]

Answer:

x = 15

Step-by-step explanation:

There are 2 triangles. The small triangle CDE has sides that are 8 and 20.

The big triangle CAB has sides 6+8 and 20 + x. Add the 6 and 8 which is 14. Create a proportion and cross multiply, divide, then solve for x.

\frac{8}{20}=\frac{14}{20+x\\}\\\\8(20 + x) = 20(14)\\160 + 8x = 280\\160-160+8x=280-160\\8x=  120\\8x/8=120/8\\x=15

8 0
2 years ago
What is -4 x 3, 3 x -4, and 5 x -4
DedPeter [7]

Answer:

Each answer is negative

Each equation has a four within it, either negative or positive

Step-by-step explanation:

-4x3=-12

3x-4=-12

5x-4=-20

7 0
2 years ago
Which of the following is not a property of a chi-square distribution?
laiz [17]

Answer:

c) Is not a property (hence (d) is not either)

Step-by-step explanation:

Remember that the chi square distribution with k degrees of freedom has this formula

\chi_k^2 = \matchal{N}_1^2 +  \matchal{N}_2^2 + ... + \, \matchal{N}_{k-1}^2 +  \matchal{N}_k^2

Where N₁ , N₂m .... N_k are independent random variables with standard normal distribution. Since it is a sum of squares, then the chi square distribution cant take negative values, thus (c) is not true as property. Therefore, (d) cant be true either.

Since the chi square is a sum of squares of a symmetrical random variable, it is skewed to the right (values with big absolute value, either positive or negative, will represent a big weight for the graph that is not compensated with values near 0). This shows that (a) is true

The more degrees of freedom the chi square has, the less skewed to the right it is, up to the point of being almost symmetrical for high values of k. In fact, the Central Limit Theorem states that a chi sqare with n degrees of freedom, with n big, will have a distribution approximate to a Normal distribution, therefore, it is not very skewed for high values of n. As a conclusion, the shape of the distribution changes when the degrees of freedom increase, because the distribution is more symmetrical the higher the degrees of freedom are. Thus, (b) is true.

6 0
3 years ago
18. What is the least common denominator of the following<br> fractions? 3/10 and 1/4
Len [333]

Answer:

20

The denominators of 3 /10  and  1 /4  are 10  and  4.

The factors of  10  are  2 × 5  and  2 × 2

Therfore the LCD should have two 2's and one 5.

This means the answer is:

2 × 2 × 5 = <u>20</u>

I hope this helps :)

7 0
3 years ago
3x^2- 2x has no c term. That means c = 0 *<br> TRUE<br> or<br> FALSE?
just olya [345]

F means false so it is not true it is false

4 0
3 years ago
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