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laila [671]
3 years ago
7

There are 70 new houses being built in a neighborhood. Last month, 2/5 of them were sold. This month, 5/7 of the remaining house

s were sold. How many houses are left to be sold?
Mathematics
1 answer:
shepuryov [24]3 years ago
8 0

Answer: 22 houses.


Step-by-step explanation:

1. You can calculate the number of houses sold last month as following:

70houses*\frac{2}{5}=28houses

2. You can calculate the number of the remaining houses sold this month as following:

28houses*\frac{5}{7}=20houses

3. Then, the number of houses are left to be sold is:

70houses-28houses-20houses=22houses


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Which of the following is equal to the rational expression when x*-2 or 3?<br> X^2 +5x+6<br> X^2-X-6
trasher [3.6K]

Answer:

Step-by-step explanation:

x=-2, x=3

---------------

x^2+5x+6=(-2)^2+5(-2)+6=(-2)(-2)-10+6=4-10+6=-6+6=0

x^2+5x+6=3^2+5(3)+6=9+15+6=24+6=30

---------------------------------------------------------------

x^2-x-6=(-2)^2-(-2)-6=4+2-6=6-6=0

x^2-x-6=3^2-3-6=9-3-6=6-6=0

-----------------------------------------------------

7 0
3 years ago
A student added 0.523+2.36 and got the answer of 0.759. what were the student's mistake?
Artemon [7]

Answer:

the answer is 2.883

Step-by-step explanation:

Because when you add 0.523+2.36, the decimal points line up together. Which make it 2.883. The student's mistake was that they didn't line the decimal points together.

3 0
4 years ago
A roofer props a ladder against a wall so that the top of the ladder reaches a 30-foot roof that needs repair. If the angle of e
gizmo_the_mogwai [7]
Set this up like a right triangle with the height of the triangle as 30, the angle across from that side, the reference angle, as 55, and the base is your unknown, x.  This means that we have the angle, the side across from it, and the side adjacent to it.  That sounds like the tangent ratio to me!  Tangent of the angle is the side opposite over the side adjacent: tan(55)= \frac{30}{x}.  Solving for x: x= \frac{30}{tan(55)}.  Do that on your calculator in degree mode to get that the distance between the base of the ladder and the wall is 21 feet
5 0
4 years ago
Plz help and I will give brainliest
DiKsa [7]

Answer:

a. f<g is one of them. On the number line, g is closest to 0, meaning it is greater than f.

b. h>0 is one answer. H is to the right of 0, meaning that h is greater than 0.

c. im sorry, i dont know.

Step-by-step explanation:

If this is graded, I hope you get a good grade!

4 0
3 years ago
Given a = -3, b = 4 and c = -5, evaluate a - b - c. -12 -6 -2
KiRa [710]
A - B - C = 
-3 - 4 + 5 = 
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-2

negative three minus four plus five is negative two
welcome :/
4 0
4 years ago
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