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
nordsb [41]
3 years ago
13

A footpath 16 m 80 cm long should be paved with stones 60 cm long. How many stones are needed?​

Mathematics
1 answer:
Annette [7]3 years ago
5 0

Answer:

28 stone bricks are necessary for this footpath.

Step-by-step explanation:

lets start by remembering that 1m has 100cm, therefore 1m = 100cm.

That being said we transform everything to centimeters since the stones are in centimeters.

16 m + 80 cm = 16 × (100 cm) + 80 cm

1600 + 80 = 1680 cm.

If every stone is 60 cm long, we need to divide our footpath length by the stone length to know how many stones are needed, therefore:

1680 cm / 60 cm = 28 bricks!!

I hope it helps :)

You might be interested in
Write an equation in standard form for a line that passes through (2,2) and (0, -3).
Alecsey [184]
First find the slope:
(-3-2)/(0-2)=-5/-2=5/2

So then y=5/2x+b

When x=0, then the y-coordinate with that is the y-intercept.

So the answer is y=5/2x-3.
7 0
4 years ago
Find all solutions to the equation. -\dfrac{2}{x(x+2)}=\dfrac{x+3}{x+2}− x(x+2) 2 ​ = x+2 x+3 ​ minus, start fraction, 2, divide
Gnoma [55]

Answer:

x=-1

Step-by-step explanation:

We have been given an equation \frac{-2}{x(x+2)}=\frac{x+3}{x+2}. We are asked to find the solutions of our given equation.

First of all, we will cross multiply our given equation as:

-2(x+2)=x(x+2)(x+3)

Subtract x(x+2)(x+3) from both sides:

-2(x+2)-x(x+2)(x+3)=x(x+2)(x+3)-x(x+2)(x+3)

-2(x+2)-x(x+2)(x+3)=0

Now we will factor out (x+2).

(x+2)(-2-x(x+3))=0

(x+2)(-2-x^2-3x)=0

(x+2)(-(x^2+3x+2))=0

Now we will factor by splitting the middle term.

-(x+2)(x^2+2x+x+2)=0

-(x+2)(x+2)(x+1)=0

-(x+2)^2(x+1)=0

Now we will use zero product property and solve for x as:

-(x+2)^2=0,(x+1)=0

(x+2)=0,(x+1)=0

x=-2,x=-1

Now, we will check for extraneous solutions.

We can see that x=-2 will make both denominators zero because our function is not defined at  x=-2.

Therefore, the solution for our given equation is x=-1.

7 0
4 years ago
Read 2 more answers
Please help thank you :))
lesya [120]

Answer:

Step-by-step explanation:

First I think this is a test and second I don't know what you're asking for.But if you can explain those things then, you have my help.

7 0
3 years ago
I hate math so much I can’t to be done with this class
Dafna11 [192]
Answer: y= 2 • (1/3)^x-2 -2
hope this helps!
5 0
3 years ago
Cos(a+b)cosb+ sin(a+b)sinb= cosa
Leviafan [203]

Step-by-step explanation:

\cos \: (a + b) \: cos \: b +  \sin \: (a + b) \: sin \: b  \\ =  \cos \: a \\ LHS  \\ =  \cos \: (a + b) \: cos \: b +  \sin \: (a + b) \: sin \: b   \\  =  \cos \{(a + b) -  b \} \\  =  \cos (a + b-  b ) \\ =  \cos  \: a  \\  = RHS \\  \\ formula \: used \\  \cos \:a \: cos \: b +  \sin \: a \: sin \: b =  \cos(a - b)

8 0
3 years ago
Other questions:
  • Can I get help with this line graph
    7·1 answer
  • What is 16/10 reduced
    11·2 answers
  • Consider the function f(x) = x2 + 2x – 15. What are the x-intercepts of the function?
    15·1 answer
  • The rate of discount, R, can be determined using the formula , where P is the regular price of an item and D is the discount, or
    13·2 answers
  • 6)
    9·2 answers
  • What is the answer (3+3)2+(15+18-6)
    7·1 answer
  • The place value of the 9 in 89,170,326
    6·2 answers
  • Which fact is not used to prove that PQR is similar to STR
    14·1 answer
  • The numbers in this chart represent the total number of points scored by five members of the high school basketball team during
    6·1 answer
  • Geomtry plzz help 15 points
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!