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fgiga [73]
3 years ago
15

What is x x+5+X+9=90

Mathematics
1 answer:
Natali [406]3 years ago
5 0
2x + 14 = 90
2x + 14 - 14 = 90 - 14
2x = 76
x = 38
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-2a-10+a=-28 please help me
Svetradugi [14.3K]

Answer:

a=18

Step-by-step explanation:

-2a-10+a=-28

-1a-10=-28

+10 +10

-1a=-18

divide by -1

a=18

6 0
2 years ago
A lot of 100 semiconductor chips contains 15 that are defective. three chips are selected at random from the lot without replace
Alex787 [66]
D=event that chip selected is defective
d=event that chip selected is NOT defective

Four possible scenarios for the first two selections:
P(DDD)=15/100*14/99*13/98=13/4620
P(DdD)=15/100*85/99*14/98=17/924
P(dDD)=85/100*15/99*14/99=17/924
P(ddD)=85/100*84/99*15/98=17/154

Probability of third selection being defective is the sum of all cases,
P(XXD)=P(DDD)+P(DdD)+P(dDD)+P(ddD)
=3/20


5 0
3 years ago
What percent of 21 is 105? ​
Natasha_Volkova [10]

Answer:

20%

Step-by-step explanation:

21/ 105

= 0.2 x 100

20%

6 0
3 years ago
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The expression x4 + 6x3 – 11x2 – 60x + 100 is equivalent to (x – 2)(x – 2)(x + 5)(x + 5). At what points does the graph of the f
nikdorinn [45]
Since y equals the product of the factors, any value for x which makes any factor equal to zero is a point where the graph touches the x-axis.

x=-5 and 2  (technically the points (-5,0) and (2,0))
6 0
3 years ago
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What is the slope of this line?
Llana [10]

Answer:

-3/2

Step-by-step explanation:

you can use the rise over run method to find the slope of this line

7 0
2 years ago
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