MATHEMATICS MIDDLE SCHOOL

In the soccer games so far this season, Letty has had 15 goals in 20 attempts at a goal. What is the probability, expressed as a percent, that she will get a goal the next time she tries for one?A) 15%
B) 20%
C) 60%
D) 75%

Answers

Answer 1
Answer: 20 is 1/5 of 100 so do 20x5=100 and 15x5=75


So there is a 75% chance she will make the goal
Answer 2
Answer: The answer would be D because 20 divided by 4 is 5 and 5 times 3 is 15 so 100 divided by 4 would be 25 and then that times 3 equals 75.

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Alberto puts 3 kinds of fish in his fish tank: zebra danios, fancy guppies, and cat fish. Half of Alberto's fish are zebra danios. He has 2 times as many catfish as he has fancy guppies.

Answers

Missing info:
Alberto's friend Jackson says 1/3 of Alberto's fish are catfish. Is Jackson correct? 

Given:
zebra danios
catfish
fancy guppies

zebra danios is 1/2 of the total number of fish
2 times as many catfish as fancy guppies

x = guppies
2x = catfish

x + 2x = 1/2 of the fish population
3x = 1/2 of the fish population
3x * 2 = 6x 
x = 1/6 number of fancy guppies

catfish:
2x = 2(1/6) = 2/6 = 1/3 catfish.

Jackson is correct. Catfish is 1/3 of the total fish population.

you spend $16 on $3 notebooks and x binders. notebooks cost $2 each and binders cost $5 each. write an equation you can use to find the number of binders you bought.

Answers

i think you buy 2 binders

Max wants to buy some shorts that are priced at 8$ each. He decides to buy a pair of sneakers for 39$, but the total cost of the shorts and sneakers must be less than 75$

Answers

in equation 39+8x=>75
x equals the amount of shorts
he can buy 4 shorts maximum
the minimum is 1 
he doesn't need 2 go over his limit

39+8*4=71
39+1*4=47

Solve the equation 1/2e=1/4

Answers

Answer:

the value of e is, 2

Step-by-step explanation:

Solve the equation:

((1)/(2))^e = (1)/(4)

we can write:

(1)/(4) = (1)/(2 \cdot 2)=(1)/(2^2) = ((1)/(2))^2

⇒((1)/(2))^e = ((1)/(2))^2         ....[1]

Using :

If a^m = a^n, then m = n

then;

On comparing  both sides in [1] we have;

e = 2

therefore, the value of e is, 2

   1/2 e = 1/4

Watch closely.  I'll try to go slow:

Multiply each side of the equation by 2 :

         e = 1/2

Were you able to follow that OK ?

What is 1/8 divided by 2

Answers

1/8 divided by 2

Keep the first fraction ⇒   1/8

Change the sign  ⇒    ×

Flip the fraction (reciprocal)   ⇒   1/2

Now multiply 
↓↓↓↓↓↓↓↓↓

1/8 * 1/2 = 1/16

Answer:  1/16

One of the Ekati mine’s pipes,called the Panda pipe, has
northern and southern gates.
A communications tower
stands 100 m outside the north
gate. The tower can be seen from
a point 300 m east of the south
gate at camp A.
a) The distance between
camp A and camp B is 600 m.
Calculate the diameter
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b) Calculate the distance from
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Answers

B) calculate the distance from
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