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djyliett [7]
1 year ago
13

Help me please I need a good grade

Mathematics
2 answers:
elena55 [62]1 year ago
8 0
X-7+2x+1=90
x+2x-7+1=90
3x-5=90
3x=96
x=32
Lorico [155]1 year ago
7 0

Answer: x=32

Step-by-step explanation:

x-7+2x+1=90

x+2x-7+1=90

3x-6=90

3x=96

x=32

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An investigative bureau uses a laboratory method to match the lead in a bullet found at a crime scene with unexpended lead cartr
Basile [38]

Answer / Step-by-step explanation:

In this exercise, we know that the agency collected 1,829 bullets which according to the agency, all came from different source.

The number of pair of bullet is :

         (1,829) = 1, 829 ! / 2! ( 1,829 - 2 ) = 1, 829 x 1,828 x 1827 ! / 2 x 1 x 1,827

          (   2   )

                   = 6, 108,413,724 / 3654

                   = 1671,706.

Also, we know that the agency found 658 matches. According to this, the chance of false positive ( that is, the agencies find a match but the bullets are from two different source ) is

   P (False positive ) = 658 / 671,706

                                   = 0.000979.

The probability is small to an extent, therefore, we should have confidence in the agency forensic report and evidence

6 0
3 years ago
Which is a better deal?<br> 4 bags of chins for $1.00 or 6 bags of chips for $1.20?
AlexFokin [52]

Answer:

6 bags of chips for 1.20

3 0
3 years ago
Which expression is equivalent to StartRoot 200 EndRoot?
Verdich [7]

Answer:

b)  √200 = 10√2

Step-by-step explanation:

Here, the given expression is: √200

Simplifying the given expression, we get:

200 = 2 x 2 x 2 x 5  x 5

⇒ 200  = (2)²  x (5) ²  x 2

Taking ROOT both sides, we get:\sqrt{200}  = \sqrt{(2)^{2}  \times (5)^{2}  \times  2}\\\implies \sqrt{200} = \sqrt{(2)^{2} } \times \sqrt{(5)^{2} } \times  \sqrt{(2) }  = 2 \times 5 \times \sqrt{2}\\ = 10 \sqrt {2}\\\implies \sqrt{200}  =  10 \sqrt {2}

Hence,   √200 = 10√2

5 0
3 years ago
Read 2 more answers
What is 1 3/10 + 1/4<br>​
Ymorist [56]
I believe it’s 31/20
6 0
3 years ago
What number would x be for 2x+1/3 and 2x be the same equation
ikadub [295]

Answer:

No solution.

Step-by-step explanation:

2x+1/3=2x

1/3=2x-2x

1/3=0

no solution

3 0
2 years ago
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