1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
n200080 [17]
2 years ago
7

Can some one help me with this question its hard :( down below ill give brainliest

Mathematics
1 answer:
vova2212 [387]2 years ago
7 0

Answer:

c

Step-by-step explanation:

You might be interested in
Constructing a brick staircase: A brick staircase has a total of 30 steps. The bottom step requires 100 bricks. Each successive
galben [10]
A) The first step needs 100 bricks, the second needs 98, the third needs 96, and so on. Therefore the number of bricks for the nth step is: a_n = a_1 + d(n-1), where a_1 = 100 (the first term), d = -2 (difference).
a_n = 100 - 2(n-1) = 102 - 2n, and for the 30th step, a_30 = 102 - 2*30 = 42. So the top step will need 42 bricks.

b) The total staircase will need: 100 + 98 + 96 + ... +  44 + 42, and there are n = 30 terms. Using the formula for the sum of an arithmetic sequence:
S = (a_1 + a_n)*n/2 = (100 + 42)*30/2 = 2130
Therefore, 2130 bricks are required to build the entire staircase.
7 0
3 years ago
A faucet in a large tank can fill the tank in 12 hours. However, there is a hose in the tank which would be able to empty the ta
Kruka [31]
It would take the faucet 18 hours to fill the tank because 18/12=1.5.  That means it will be 1.5 times slower to fill the tank up with the hose on.  1.5*12=18.
7 0
3 years ago
It takes approximately 4.65 quarts of milk to make a pound of cheese. Express this amount as a mixed number in simplest form.
ikadub [295]
The correct answer would be 4 and 13/20
4 0
2 years ago
The rectangle shown is dilated by a scale factor of 1/5
Harrizon [31]

Answer:

A'B'= 3 cm and B'D' = 1.6 cm

Step-by-step explanation:

First of all, we are told that the scale factor = 1/5

Now,we know that If the scale factor is less than 1, then the dilation is a reduction.

Thus, in this question the dilation is a reduction.

For us to calculate the dimensions of the dilated rectangle, we'll multiply the original dimensions by the scale factor

Thus;

A'B' = AB(1/5)

A'B' = 15(1/5) = 3 cm

B'D' = BD(1/5) = 8(1/5) = 1.6 cm

Thus, The length of each side of the dilated rectangle are;

A'B'= 3 cm and B'D' = 1.6 cm

5 0
3 years ago
A printer makes more than 3 copies of a book every hour. How many books can the printer make in 4 hours?
sineoko [7]

Answer:

12

Step-by-step explanation:

4 x 3 is 12

7 0
2 years ago
Read 2 more answers
Other questions:
  • Find the distance between the points (2,8) and (-1, 9)
    14·2 answers
  • Find the measure of angle b
    15·2 answers
  • How would you solve this and what would the answer be? im very confused
    13·1 answer
  • Do parallel lines that are not vertical have the same slope?<br><br><br> Yes or no
    6·1 answer
  • 1. Zoey took a taxi from her house to the airport. The taxi company charged a pick-up fee of $1.20 plus $3.25 per mile. The tota
    7·1 answer
  • Ben kaç yasındayım<br>A 12<br>B 10<br>C 8<br>D 14​
    5·1 answer
  • A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following d
    14·1 answer
  • I need this help me please
    11·1 answer
  • Answers for these two questions
    11·1 answer
  • Triangles FGH and F'G'H 'are similar
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!