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damaskus [11]
3 years ago
9

Please help!

Mathematics
1 answer:
SpyIntel [72]3 years ago
3 0
Number 1 is B
Number 2 is also B
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PLEASE HELLPPPPPPPPPPPPP!!!!!!!!
Slav-nsk [51]
The first answer is 25x + 45 = c
The second one is y=3x
Hopes this helps
6 0
2 years ago
Seven less than sixteen times a number is equal to the same number reduced by 5. What is the number?
Romashka [77]

Answer:

x = 2/15

Step-by-step explanation:

first, create a formula or expression

16x - 7 = x - 5

move x, subtract it

15x - 7 = -5

add 7

15x = 2

divide by 15

x = 2/15

sub in to check:

-4.85667 = -4.86667

7 0
3 years ago
Point E is between points D and F. If DE = x - 4 , EF = 2x + 5 , and DF = 4x- 8 , find x
horsena [70]
You know that 
DE+EF=DF
(x-4) + (2x+5) = (4x-8)


combine like terms3x+1 = 4x-8
1 = x-8
x=9
3 0
3 years ago
A bag contains five white balls and five black balls. Your goal is to draw two black balls.
umka21 [38]

Answer:

a.) the probability that both the ball drawn are black  = \frac{10}{45} = \frac{2}{9}

b.) Sum of all the probabilities = \frac{\frac{2}{9} }{1 - \frac{2}{9} }  = \frac{\frac{2}{9} }{\frac{8}{9} }  = \frac{2}{8} =\frac{1}{4} = 0.25

Step-by-step explanation:

a) two balls are drawn at random .

   total number of balls   =  10

 number of black balls    =  5

  number of white balls    = 5.

   the number of ways two balls can be drawn = \binom{10}{2}  = \frac{10!}{2! 8!}  = \frac{10\times9}{2}  = 45

  the number of ways two black balls can be drawn = \binom{5}{2}  = \frac{5!}{2! 3!}  = \frac{5\times4}{2}  = 10

   the probability that both the ball drawn are black  = \frac{10}{45} = \frac{2}{9}

b) probability that First draw of two black balls = \frac{2}{9}

  probability that first draw is of two white balls is and second draw is of

  two black balls  = \frac{2}{9} \times\frac{2}{9}

  Probability that first two draws are of white balls and the third draw is of

  two black balls = \frac{2}{9} \times\frac{2}{9} \times\frac{2}{9}

  This is a geometric sequence and the final probability will be the sum of    

  all such probabilities, where we can take the the sequence to be an infinite series and the first term is \frac{2}{9} and the common ratio is \frac{2}{9}  which is less than 1.

  Sum of all the probabilities = \frac{\frac{2}{9} }{1 - \frac{2}{9} }  = \frac{\frac{2}{9} }{\frac{8}{9} }  = \frac{2}{8} =\frac{1}{4} = 0.25

3 0
3 years ago
What is 700070.07 is standard form??
mojhsa [17]
The standard form is
8 0
3 years ago
Read 2 more answers
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