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quester [9]
3 years ago
11

Find the value of x. 5x+18+2x=5

Mathematics
2 answers:
Lesechka [4]3 years ago
3 0

Answer: x=-1.9

Step-by-step explanation:

5x+2x=7x

7x+18=5

-18 on both sides

7x=-13

divide 7 on both sides

x=-1.9

brilliants [131]3 years ago
3 0

Answer

<h2><em>X=</em><em>-</em><em>1</em><em>.</em><em>9</em></h2>

<em>solution</em>

<em>5x + 18 + 2x = 5 \\ or \: 5x + 2x + 18 = 5 \\ or \: 7x + 18 = 5 \\ or7x = 5 - 18 \\ or \: 7x =  - 13 \\ \: x =  -  \frac{13}{7}</em>

<em>X=</em><em>-</em><em>1</em><em>.</em><em>9</em>

<em>hope </em><em>this </em><em>helps.</em><em>.</em>

<em>Good </em><em>luck</em><em> on</em><em> your</em><em> assignment</em><em>.</em><em>.</em><em>.</em>

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3 years ago
The probability that a student has a Visa card (event V) is .63. The probability that a student has a MasterCard (event M) is .1
Aleksandr-060686 [28]

Answer:

a)  The probability that a student has either a Visa card or a MasterCard is 0.71.  

b) V and M are not independent.

Step-by-step explanation:

Given : The probability that a student has a Visa card (event V) is 0.63. The probability that a student has a MasterCard (event M) is 0.11. The probability that a student has both cards is 0.03.

To find :

a) The probability that a student has either a Visa card or a MasterCard ?

b)  In this problem, are V and M independent ?

Solution :

The probability that a student has a visa card(event V) is P(V)= 0.63

The probability that a student has a MasterCard (event M) is P(M)= 0.11

The probability that a student has both cards  is P(V \cap M)=0.03

a) Probability that a student has either a Visa card or a Master Card is given by,

P(V \cup M) = P(V) + P(M) - P(V\cap M)

P(V \cup M) = 0.63+ 0.11- 0.03

P(V \cup M) =0.74- 0.03

P(V \cup M) =0.71

The probability that a student has either a Visa card or a MasterCard is 0.71.

b) Two events, A and B, are independent if P(A\cap B)=P(A)P(B)

For V and M to be independent the condition is satisfied,

P(V\cap M)=P(V)P(M)

Substitute the values,

0.03=0.63\times 0.11

0.03\neq 0.0693

So, V and M are not independent.

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Answer:

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The given table is presented as follows;

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Therefore, the rock hits the ground between t = 2 seconds and t = 2.5 seconds after it is dropped.

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