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Shalnov [3]
3 years ago
7

A bag contains 6 red marbles, 3 blue marbles and 2 green marbles. if two marbles are drawn out of the bag, what is the exact pro

bability that both marbles drawn will be blue?
Mathematics
1 answer:
dedylja [7]3 years ago
3 0
There is a 1 in 11 chance of both marbles being blue
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An alloy is composed of nickel, zinc, and copper in a 7:2:9 ratio. How many kilograms of each metal is needed to make 3.8 kg of
Tamiku [17]
Ni : Zn: Cu = 7:2:9 =7x : 2x : 9x

7x+2x+9x = 3.8
18x=3.8
x=3.8/18=1.9/9≈0.21

Ni:   7x=7*0.21=1.47 ≈1.5 kg
Zn:  2x=2*0.21=0.42≈0.4 kg
Cu: 9x=9*0.21=1.89 ≈1.9 kg

Check 1.5+0.4+1.9 =3.8 True
6 0
3 years ago
Sarah's age is five less than twice her sister's age. Sarah is fifteen years old.
saul85 [17]
Let her sisters age be x.
=>sister .....x

Sarah.
twice x=2x. then less than 5
=> (2x-5 )
if Sarah = 15 years
by substation, 2x-5=15
3 0
3 years ago
Read 2 more answers
Graph the equation.<br> y=5/17(x-1)(x-9)
Anni [7]

Answer:

Attached Image

Step-by-step explanation:

Vertex: (5, -5)

X-Intercepts: (1,0) (9,0)

Y-Intercepts: (0, 2.813)

hope this helps :)

7 0
2 years ago
Read 2 more answers
Use the following algorithm:
andriy [413]

Answer:

First it says that you have to multiply the number x times 2, this will give you 2x as a result. Next you have to build your equation which is 2x=10, when you have an equation like this, you divide the result with the number before x (x=10÷2) your result will be x=5. Now you have to square the result (which is x) to get y, when squaring a number you have to multiply it by itself (depending of how many times it's asking to do so when there's a small number at the upper right corner of your number, that's how many times you multiply it) so if you have to square 5, it should be 5×5 which gives you the result of y being 25.

5 0
3 years ago
I am an even number i am less than 100,the sum of my digits is 15, i am multiple of 12
Yakvenalex [24]

Answer:

96

Step-by-step explanation:

herp derp herp derp herp derp

7 0
3 years ago
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