3 years ago

Find her number and explain

Mathematics

2 answers:

Andreas93 [3]3 years ago

8 0

It should be 11. hope this helps :)

german3 years ago

3 0

Answer: 11

Step-by-step explanation:

Just do it backwards. Add 5 to 17, and then divide that by 2.

17+5= 22

22/2=11

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A bag contains 100 marbles which are red, green, and blue. Suppose a student randomly selects a marble without looking, records

ra1l [238]

Answer:

35 red marbles

Step-by-step explanation:

So we can put the different color marbles in a ratio. So 7:2:11. If we add all of those up we get 20. We do 100/20 to get 5. Each number in the ratio is equivalent to 5 marbles. Then we do 7*5 to get 35. We can check our work by doing, (7*5) + (2*5) + (11*5) = 100. And it does equal 100 so the answer is correct.

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3 years ago

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If a = -3, find the value of a) 2a b) a^2 c) 3a^2

White raven [17]

Answer:

a) -6

b) 9

c) 27

Step-by-step explanation:

$2( - 3) = - 6 \\ { - 3}^{2} = - 9 \\ 3 {( - 3)}^{2} = 27$