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3 years ago

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Carly wants to buy some notebooks that cost $3.50 each. She has $20 to spend. She set up this inequality to find out how many no

tebooks she can buy. 3.5n < 20 Which set of numbers represents all possible numbers of notebooks Carly could buy? A. {0, 1, 2, 3, 4} B. {0, 1, 2, 3, 4, 5} C. {0, 1, 2, 3, 4, 5, 6} D. {0, 1, 2, 3, 4, 5, 6, 7}

2 answers:

nlexa [21]3 years ago

6 0

Answer:

B. {0, 1, 2, 3, 4, 5}. Mark me Brainliest PLZ

Step-by-step explanation:

ankoles [38]3 years ago

4 0

Answer:

B.

Step-by-step explanation:

You have to use the number in the variable to figure out if the number multiplied by 3.5 goes over 20 dollars. The highest you can go without going over 20 dollars is 5 notebooks

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Estimate the number of DVDs that will be checked out for every 100 patrons.

anastassius [24]

The number of DVDs that will be checked out for every 100 patrons will be 20.

<h3>How to find that a given condition can be modeled by binomial distribution?</h3>

Binomial distributions consist of n independent Bernoulli trials.

Bernoulli trials are those trials that end up randomly either on success (with probability p) or on failures( with probability 1- p = q (say))

Suppose we have random variable X pertaining to a binomial distribution with parameters n and p, then it is written as

$X \sim B(n,p)$

The probability that out of n trials, there'd be x successes is given by

$P(X =x) = \: ^nC_xp^x(1-p)^{n-x}$

The expected value of X will be:

$E(X) = np\\$

The information is given in the table.

The probability of getting DVDs will be

$\rm p = \dfrac{2}{10}\\\\p=2$

The value of n is 100.

Then the number of DVDs that will be checked out for every 100 patrons will be

$\rm E(X) = 100 \times 0.2\\\\E(X) = 20$

Learn more about binomial distribution here:

brainly.com/question/13609688

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5 0

2 years ago

A ball is thrown upward from the top of a building. The function below shows the height of the ball in relation to sea level, f(

ratelena [41]

Answer:

The average rate of change of f(t) from t = 3 seconds to t = 5 seconds is -80 feet per second.

Step-by-step explanation:

The function that models the height of the ball is:

$f(t)=-16t^2+48t=160$

At t=3, $f(3)=-16(3)^2+48(3)+160=160$

At t=5, $f(5)=-16(5)^2+48(5)+160=0$

The average rate of change is simply the slope of the secant line connecting.

$(3,f(3))$ and $(5,f(5))$ .

The average rate of change

$=\frac{f(3)-f(5)}{3-5}$

$=\frac{160-0}{-2}$

$=-80fts^{-1}$

5 0

4 years ago

Pls help if your kind <3 (picture)

AlladinOne [14]

Answer:

1: x=23.313708 2: B x = -13.2 3: x = 152

All the problems examples at the bottom

Step-by-step explanation:

1: 12x=−3(4−x)

12x=3x−12

Step 1: Divide both sides by 12.

12x12=3x−1212

x=14x−1

Step 2: Solve Square Root.

x=14x−1

x=(14x−1)2(Square both sides)

x=116x2+−12x+1

x−(116x2+−12x+1)=116x2+−12x+1−(116x2+−12x+1)(Subtract 1/16x^2+(-1)/2x+1 from both sides)

−116x2+32x−1=0

x=−b±b2−4ac2a(Use quadratic formula with a=-0.0625, b=1.5, c=-1)

x=−(1.5)±(1.5)2−4(−0.0625)(−1)2(−0.0625)

x=−1.5±2−0.125

x=0.6862915010152388,23.31370849898476

2: 3+2.7x=9.6+3.2x

Step 1: Simplify both sides of the equation.

2.7x+3=3.2x+9.6

Step 2: Subtract 3.2x from both sides.

2.7x+3−3.2x=3.2x+9.6−3.2x

−0.5x+3=9.6

Step 3: Subtract 3 from both sides.

−0.5x+3−3=9.6−3

−0.5x=6.6

Step 4: Divide both sides by -0.5.

−0.5x−0.5=6.6−0.5

x=−13.2

3: 9+34x=78x−10

Step 1: Simplify both sides of the equation.

9+34x=78x−10

9+34x=78x+−10

34x+9=78x−10

Step 2: Subtract 7/8x from both sides.

34x+9−78x=78x−10−78x

−18x+9=−10

Step 3: Subtract 9 from both sides.

−18x+9−9=−10−9

−18x=−19

Step 4: Multiply both sides by 8/(-1).

(8−1)*(−18x)=(8−1)*(−19)

x=152

I really hope this helped you

4 0

3 years ago

You need 4/5 cups of strawberriers to make 1 pie how much cups will u need to make 2 pies

Annette [7]

Answer:

1 $\frac{3}{5}$ cups of strawberries

Step-by-step explanation:

To find how much you will need for 2 pies, multiply 4/5 by 2:

4/5(2)

= 8/5

Simplify this to a mixed number:

= 1 $\frac{3}{5}$

So, you will need 1 $\frac{3}{5}$ cups of strawberries to make 2 pies

8 0

3 years ago

Read 2 more answers

Galina-37 [17]

Answer:

$9x- 60=10$

Step-by-step explanation:

Given

$\frac{3}{4}x - 5 = \frac{5}{6}$

Required

Rewrite to remove fractions

The denominators in the above expression are 4 and 6.

So, first we take the LCM of 4 and 6

$LCM = 12$

Next, multiply both sides of the equation by this LCM (12)

$12 ( \frac{3}{4}x - 5) = \frac{5}{6} * 12$

$12 * \frac{3}{4}x - 12 *5 = \frac{5}{6} * 12$

$3 * 3x- 60=5 * 2$

$9x- 60=10$

8 0

3 years ago