Ask question

Ask question

All categories

3 years ago

15

A librarian has 170 books to pack into boxes. On Monday she packed 48 books and on Tuesday she packed 56 books. How many more bo

oks does the librarian need to pack into boxes?

1 answer:

Marianna [84]3 years ago

4 0

48+56=104; 170-104= 66. The librarian needs to pack 66 more books.

You might be interested in

Distance between (3,-7) and (3,5)

Sveta_85 [38]

Answer:

The distance between the two points, (3, -7) and (3,5) is 12

Step-by-step explanation:

PLEASE MARK BRAINLIEST

3 0

3 years ago

Read 2 more answers

What is the equation of the line that is

Fantom [35]

Answer:

$y = m_{AB}(X-2)-1$

Step-by-step explanation:

When two lines are parallel means that their slopes are equal. Therefore the line AB will have same slope to a parallel second line, $m_{AB} = m_{2}$ .

To obtain the slope from the line AB, we need two points, so the general equation will be:

$m_{AB} = \frac{y_{B} -y_{A} }{x_{B}-x_{A} }$

The typical equation of a line is written as y = mx + b

The second line will pass through point (2, -1), so we can substitute:

y2 = mX2 + b

-1 = $-1=m_{AB} (2)+b$ (2) + b

then the interception is $b=-m_{AB} -1$

Now to obtain a general equation for the second parallel line will be:

y = $m_{AB}$ X + b

y = $m_{AB}$ X - $m_{AB}$ (2)-1

Finally we get:

y = $m_{AB}$ (x-2)-1

3 0

3 years ago

A circular cylindrical container, open at the top, and having a capacity of 24pi cubic inches, is to be manufactured. If the cos

otez555 [7]

Answer: radius r = 2 inches

height h = 6 inches

Step-by-step explanation:

Given;

Volume V = 24πin3

Volume of a cylinder is given by

V = πr^2h

h = V/πr^2. ....1

Where, h = height and r = radius of cylinder

For the surface area of the cylinder with open top. we have,

S = 2πrh + πr^2

For the cost of materials used, let k represent the cost of materials used for the body of the cylinder.

Then, for the bottom will be 3k

Total cost will be represented by C, which gives

C = 2πrhk + 3πr^2k. .....2

Substituting eqn 1 to 2, we have;

C = 2πrVk/πr^2 + 3πr^2k

C = 2Vk/r + 3πr^2k

The material cost is minimum at dC/dr = 0

dC/dr = -2Vk/r^2 + 6πrk =0

6πrk = 2Vk/r^2

r^3 = 2V/6π

r = (2×24π/6π)^-3

r = (8)^-3

r = 2

Substituting r = 2 into eqn1

h = 24π/π(2^2)

h = 24/4 = 6

h = 6

5 0

3 years ago

Which symbol makes a true statement? –2.75 ? –3 A. = B. > C.

Iteru [2.4K]

<span>–2.75 > –3

answer is </span><span>B. ></span>

7 0

3 years ago

A basketball player makes 60% of his free throws. We set him on the line of free-throw and informed him to shoot free throws unt

pshichka [43]

Answer:

B. 0.03110

Step-by-step explanation:

Given

Probability of Hit = 60%

Required

Determine the probability that he misses at 6th throw

Represent Probability of Hit with P

$P = 60\%$

Convert to decimal

$P = 0,6$

Next; Determine the Probability of Miss (q)

Opposite probabilities add up to 1;

So,

$p + q = 1$

$q = 1 - p$

Substitute 0.6 for p

$q = 1 - 0.6$

$q = 0.4$

Next,is to determine the required probability;

Since, he's expected to miss the 6th throw, the probability is:

$Probability = p^5 * q$

$Probability = 0.6^5 * 0.4$

$Probability = 0.031104$

Hence;

<em>Option B answers the question</em>

7 0

3 years ago