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SSSSS [86.1K]
2 years ago
7

Assuming that the triangles below are similar. Find the value of x.

Mathematics
2 answers:
ElenaW [278]2 years ago
8 0

Answer:

14

Step-by-step explanation:

14 bc you invert the triangle, 9× 2 is 18, so on the other side 6× 2 is 12, + 2 is 14

alex41 [277]2 years ago
6 0

Answer:

X = 29

Step-by-step explanation:

Considering they are similar then the side A-B would have a ratio of 3:1 with J-K and since A-B = 6 and J-K = 18. Using this same logic B-C (X-2) = K-L (9). So BC = 9x3 which would mean X = (9x3 + 2) or 29

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The probability distribution for the number of automobiles lined up at a Lakeside Olds dealer at opening time (7:30 a.m.) for se
Gala2k [10]

Answer:

E(X) = \sum_{i=1}^n X_i P(X_i)

And replacing we got:

E(X) = 1*0.05 +2* 0.3 +3* 0.4 +4*0.25 = 2.85

So we are going to expect about 2,85 automobiles for this case.

Step-by-step explanation:

For this case we define the random variable X as "number of automobiles lined up at a Lakeside Olds dealer at opening time (7:30 a.m.)" and we know the distribution for X is given by:

X         1         2       3         4

P(X)  0.05  0.30  0.40   0.25

The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete

For this case we can calculate the epected value with this formula:

E(X) = \sum_{i=1}^n X_i P(X_i)

And replacing we got:

E(X) = 1*0.05 +2* 0.3 +3* 0.4 +4*0.25 = 2.85

So we are going to expect about 2,85 automobiles for this case.

4 0
3 years ago
What percent of a data set is represented by Q1
Ludmilka [50]
I think it's 25%

Hope that helps
4 0
4 years ago
Read 2 more answers
If f ( x ) = 3x 2 - 6x + 2 and g ( x ) = 2x 2 + 2x - 11,<br> then find f ( x ) + g ( x ).
nikitadnepr [17]

Answer:

5x^{2} -4x-9

Step-by-step explanation:

f(x)+g(x)

(3x^{2} -6x+2) + (2x^{2} +2x-11)\\3x^{2} -6x+2 + 2x^{2} +2x-11\\
combine like terms --
5x^{2} -4x-9

6 0
2 years ago
Betty saves 3 times as much as Ann. Charles save 390 less than Ann.. If Betty saves save 1330 more than Charles. how much does C
Igoryamba

Answer:

80

Step-by-step explanation:

We let x be Ann's savings.

Betty saves 3 times as much as Ann.

This implies that Betty's savings in terms of x

= 3x

Charles save 390 less than Ann.

This implies Charles savings

= x - 390

Betty saves 1330 more than Charles.

This implies that when we deduct Charles savings from Betty's we have to get 1330.

Mathematical equation for the problem:

3x - (x - 390) = 1330

Expand :

\implies 3x - x  + 390= 1330

\implies 2x + 390= 1330

Subtract 390 from both sides.

\implies 2x + 390 - 390= 1330 - 390

\implies 2x=940

Divide through by 2

\implies \frac{2x}{2} = \frac{940}{2}

\implies x=470

Hence Charles saving is

x - 390 = 470 - 390 = 80

7 0
4 years ago
Please help me and make sure to show your work
irina1246 [14]
Answer: C 20

Explanation: Plug in 2 for k.

2^2 - (2-10) + 4(2) = 20
4 0
3 years ago
Read 2 more answers
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