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Aleks04 [339]
3 years ago
13

Ava surveyed the students in her homeroom about their footwear. She found that 12 students were wearing sneakers, 4 students wer

e wearing boots, and 6 students were wearing dress shoes. She used this data to create a tool that would predict the footwear of randomly chosen students in the school. She placed 2 blue marbles, 3 red marbles, and 6 yellow marbles in a bag, and selected one marble, with replacement, for each student.
What is the predicted footwear of three randomly chosen students if Ava drew two yellow marbles and 1 blue marble?
2 students wearing boots and 1 student wearing sneakers
2 students wearing sneakers and 1 student wearing boots
2 students wearing dress shoes and 1 student wearing boots
2 students wearing sneakers and 1 student wearing dress shoes
Mathematics
1 answer:
Lilit [14]3 years ago
7 0
2 students wearing sneakers and 1 student wearing dress shoes
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A baker purchased 13 lb of wheat flour and 14 lb of rye flour for a total cost of $14.85. A second purchase, at the same prices,
postnew [5]

An equation is formed when two equal expressions. The cost per pound of wheat flour is $0.55 and the cost of per pound of rye flour is $0.55.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Let the cost of a pound of wheat flour be x and the cost of a pound of rye flour be y.

A baker purchased 13 lb of wheat flour and 14 lb of rye flour for a total cost of $14.85.

13x + 14y = $14.85

x = (14.85-14y)/13

A second purchase, at the same prices, included 15 lb of wheat flour and 12 lb of rye flour.

15x + 12y = $14.85

Substitute the value of x from the above equation and solve for y,

\dfrac{15(14.85-14y)}{13} + 12y = 14.85\\\\222.75-210y+156y = 193.05\\\\y = 0.55

Substitute the value of y in any one of the equations formed,

13x + 14(0.55) = 14.85

13x = 7.15

x = 0.55

Hence, the cost per pound of wheat flour is $0.55 and the cost of per pound of rye flour is $0.55.

Learn more about Equation:

brainly.com/question/2263981

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8 0
2 years ago
7)) Brainliest and 10+ points!
lara [203]

Answer:

Divide by 2

Then subtract 4

Step-by-step explanation:

Let y = 2(x+4)

Exchange x and y

x = 2(y+4)

We want to solve for y

Divide each side by 2

x/2  = y+4

Then subtract 4 from each side

x/2 -4 =y

The inverse is x/2 -4

3 0
3 years ago
Read 2 more answers
Treasury bills are paying a 4% rate of return. A risk-averse investor with a risk aversion of A = 1.85 should invest entirely in
kumpel [21]

Answer:

14.656%

Step-by-step explanation:

Data provided in the question:

Rate of return, r = 4% = 0.04

Risk aversion of A = 1.85

Standard deviation, σ = 24%

Now,

we have the relation

A = (E - r) ÷ σ²

E = expected return on portfolio

r = Risk free rate

on substituting the respective values, we get

1.85 = (E - 0.04) ÷ (0.24)²

or

0.0576 × 1.85 = (E - 0.04)

or

0.10656 + 0.04 = E

or

E = 0.14656 or

E = 0.14656 × 100% = 14.656%

8 0
3 years ago
List all the elements NOT in Set M.
Anika [276]
6, 2, 5, 8
All you have to do is list all the numbers not in circle M
9, 3, 4, 7 are all in set M, but 6, 2, 5, 8 are not
hope this helps:)
4 0
4 years ago
Solve the equation step by step
LekaFEV [45]

Let <em>x</em> be the amount of salt in the solution.

At day's end, the concentration of salt in the beaker is

<em>x</em> / (4 L) = 0.08 = 8%

Solve for <em>x</em> to get

<em>x</em> = 0.08 (4 L) = 0.32 L

So at the beginning, the concentration of salt in the beaker was

(0.32 L) / (5 L) = 0.064 = 6.4%

7 0
3 years ago
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