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notka56 [123]
3 years ago
7

Chris spent half of his money on a pair of headphones.then he spent half of his money on cds.finally,he spent $12.75 on a book.h

ow much money did chris have to begin with
Mathematics
1 answer:
Andrews [41]3 years ago
7 0
Did he have any money left after that
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2. Which expression is equivalent to 2x2 + (4x - 6x2)+9 - (6x + 3)?
frez [133]
The answer is g you just have to combine the Like terms
8 0
3 years ago
Prove that 3:8 is equivalent to 12:32.
ANEK [815]
3:8 can also be written as 3/8

<span>12:32 can also be written as 12/32

</span>\frac{12}{32} =  \frac{3\times 4}{8\times 4} = \frac{3}{8}

<span>So thus 3:8 is equivalent to 12:32</span>
7 0
3 years ago
Howhowhow?how??? how would you calculate
Liula [17]

Ok sooooooooooo

Lets say your two fractions are

13/26 and 20/40

you can divide the bottom number by the top one and if you get the same answer for both then they are equivalent. For these you get 2 for both, which means they are equivalent.

another example would be if your fractions are

2/5 and 4/10

You can say well 2*2 equals 4 And 5*2 equals ten so these are equivalent fractions.

3 0
3 years ago
Ball B, with a mass of 30kg, is moving to the left at -10 m/s. With what velocity should Ball A, with a mass of 10 kg, move to t
tangare [24]
Initially, Ball A of 10 kg will have velocity x, while Ball B of 30 kg has velocity -10 m/s.
After collision, Ball A will have a velocity of -30 m/s, while Ball B will have velocity 10 m/s. We assume their masses do not change.
(10 kg)(x m/s) + (30 kg)(-10 m/s) = (10 kg)(-30 m/s) + (30 kg)(10 m/s)
10x - 300 = -300 + 300
x = 30 m/s (to the right)
5 0
3 years ago
Mr. Thornton's class visited five freshwater lakes to learn more about the crocodiles and alligators living in them to class cou
Yuliya22 [10]

Given table is given below

The relationship between the number of crocodiles and the number of alligators is not proportional across all lakes. Only two of the lakes have crocodiles and alligators in the same proportion. Which two lakes are they?

lake A and lake B

lake B and lake C

lake A and lake E

lake C and lake D

Answer : lake A and lake E

Lake ---> Crocodiles ---> Alligators ---> Ratio

A ---> 4 ----> 5

B ---> 21 ---> 35

C ---> 3 ---> 9

D ---> 6 ---> 16

E ---> 24 ---> 30

The ratio of A is 4: 5

B is 21: 35 = 3 : 5

C is 3 : 9 = 1 : 3

D is 6 : 16 = 3 : 8

E is 24: 30 = 4 : 5

Lake A and E has the same ratio 4: 5

7 0
3 years ago
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