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IrinaVladis [17]
2 years ago
13

A shipment contains 9 igneous, 7 sedimentary, and 7 metamorphic rocks. If 7 rocks are selected at random, find the probability t

hat exactly 5 are sedimentary.
Mathematics
1 answer:
yKpoI14uk [10]2 years ago
7 0

Answer:

75 percent

Step-by-step explanation:

see the thing is

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HILP3.)
Pachacha [2.7K]

Answer:

Step-by-step explanation:

a-number of advance  tickets

s-number of same day tickets

a*40+s*25=2400

a      +s      =75

I solve  with the substitution method

s=75-a

40a+25*(75-a)=2400

40a+1875-25a=2400

15a=2400-1875

15a=525

a=525/15

a=35

so  s=75-35

s=40

5 0
3 years ago
8+x/2=-12 i need help badly
Musya8 [376]
First subtract 8 from both sides 
leaving you with x/2 = -20 
Then multiply both sides by two to get rid of the denominator
which leaves you with x = -40
4 0
3 years ago
Read 2 more answers
The equation i need help with in math is x-7=-13, i need a step by step anwser
vladimir2022 [97]

If x - 7 = -13, we need to get x by itself to solve this equation. To get x by itself, we can add 7 to each side (that way x will be by itself, and only on one side of the equation).


x - 7 + 7 = -13 + 7


We can add 7 to each side without changing the quantity because we do it to BOTH sides.


x = -13 + 7


Since -13 + 7 is -6,


x = -6

6 0
3 years ago
What is the rule for calculating |x| for any value of x?
padilas [110]
Anything with || around it is a whole value. It’s always a positive. For example, |-56|=56. Now, if the negative was on the outside, it would be a negative like so; -|10| =-10
6 0
3 years ago
Enter the ratio as a fraction in lowest terms<br> 6 ft to 70 in.
Sever21 [200]

Answer:

36:35

Step-by-step explanation:

First, make the 6 feet into inches.

In 1 foot there is 12 inches.

6 x 12=72

72:70

Simplify this by 2.

36:35

So, the final ratio is 36:35

8 0
3 years ago
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