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2 years ago

7

Suppose a jar contains 16 red marbles and 32 blue marbles. if you reach in the jar and pull out 2 marbles at random, find the pr

obability that both are red.

1 answer:

valentinak56 [21]2 years ago

5 0

1/6

This is because the probability of pulling a red is 1/3. Multiply that by itself to find the chance of repeating.

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A chemist has a 40% alcohol solution and a 25% alcohol solution. How much of each should he mix together to get 50 liters of a 3

ludmilkaskok [199]

Answer:

33 1/3 L of the 40% solution, 16 2/3 L of the 25% solution

Step-by-step explanation:

Set up two equations...

Let x represent the number of Liters of the 40% solution

Let y represent the number of Liters of the 25% solution

We need 50 liters total, so

x + y = 50

and we need the 50 L to be 35% solution, so

0.4x = 0.25y = 0.35(50)

Solve the first equation for one variable...

x = 50 - y (subtract y from both sides in equation 1)

Now substitute that value into the second equation...

0.4(50 - y) + 0.25y = 17.5 (x becomes 50 - y, 0.35(50) = 17.5)

Now solve for y...

20 - 0.4y + 0.25y = 17.5

-0.15y = -2.5

y = 16.66666667

y = 16 2/3 L

So we need to plug that into the first equation to find 'x'

x + 16 2/3 = 50

x = 50 - 16 2/3

x = 33 1/3

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2 years ago

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What is the probability that a student is in 11th grade and plays football?

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Answer:

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Step-by-step explanation:

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Brian claims that he can eat a pie that is divided into 6 equal pieces in 2 minutes if he can eat the whole pint 2 minutes how l

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A third of a minute

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Today Zack sold twice as many bags of popcorn at the ball game as he sold last Saturday. In the 2 days he sold a total of 96 bag

Alexeev081 [22]

Answer:

$s=32\\t=64$

Zack sold 32 bags of popcorn last Saturday, and 64 bags of popcorn today.

Step-by-step explanation:

Start by determining what information the question gives us, and what we need to find.

Given:

Zack sold <em>twice</em> as many bags of popcorn as he sold last Saturday

He sold <em>96 bags</em> altogether in the 2 days

Find:

s, number of bags he sold last Saturday

t, number of bags he sold today

Equation/System of Equations:

$t=2s$ (OR "number of bags he sold today = number of bags he sold last Saturday multiplied by 2, or twice the amount he sold last Saturday)

$t+s=96$ (OR "number of bags he sold today + number of bags he sold last Saturday is equivalent to the amount of bag he sold altogether which is 96 bags as given by the question)

Solve:

We can solve this system of equations using substitution. In this case, we can substitute "2s" for "t" into the second equation giving us...

$2s+s=96\\3s=96$

Divide both sides by 3. Notice that the Division Property of Equality states that if you divide on side of the equation by something, you must divide the other side by the same quantity.

$s=\frac{96}{3}\\s=32$

Substitute 32 in for "s" to solve for "t"...

$t=2s\\t=2(32)\\t=64$

Answer:

Zack sold 32 bags of popcorn last Saturday, and 64 bags of popcorn today.

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2 years ago

QUICK QUESTION: did I do this right?

zloy xaker [14]

It it fully correct
Hope you have a good day!
Can ai get brainliest?

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2 years ago