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nordsb [41]
3 years ago
14

Nisha wants to study for 5 hours for the spelling bee. If she studys for 1/3 hour per night. How man y nights will she have to s

tudy?
Mathematics
2 answers:
andriy [413]3 years ago
5 0

Answer: 15 nights


Step-by-step explanation:

Given: Duration of study by Nisha for the spelling 'bee'.=5 hours

Rate of her study=1/3 hour per night

Let she studies y hours for the spelling 'bee' then

Rate of her study=\frac{5}{y} [divide hours of study by 'y' ]

\\\Rightarrow\frac{5}{y}=\frac{1}{3}\\\Rightarrow\ y=5\times3\\\Rightarrow\ y=15\ hours

Hence she has to study 15 nights.

Alchen [17]3 years ago
4 0
If it takes 1/3 of an hour every night we need to find how many thirds are in 5.

We divide 5 by 1/3 which is the same as 5 times 3 which equals 15.

It will take 15 nights to study for 5 hours.
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Ymorist [56]

Answer:

46 ft

Step-by-step explanation:

A = (pi)r^2

(pi)r^2 = 1661.06 ft^2

r^2 = 529 ft^2

r = 23 ft

d = 2r = 2(23) = 46 ft

Answer: 46 ft

8 0
3 years ago
If a and b are integers such that a2 − b2 = 100, what is the greatest possible value of a?
tatyana61 [14]

Answer:

26

Step-by-step explanation:

Question says that 'a' and 'b' are integers that implies we cannot have 'a' and 'b' in the form of decimals.

Now, lets expand the given equation:

a^2-b^2=100

(a+b)(a-b)=100

Lets say: (a+b)=p, (a-b)=q

Let us consider the factor pairs of 100.

(1 \times 100), (2 \times 50), (4 \times 25), (5 \times 20), (10 \times 10), (20 \times 5), (25 \times 4), (50 \times 2), (100 \times 1)

Only factor pair (2,50) gives us the integer values of 'a' and 'b'.

a+b=50....equation  (1)

a-b=2........ equation (2)

adding equation 1 and 2, we get:

2a=52

a=\frac{52}{2}=26

a-b=2

Plugging the value of 'a' in the equation 2

26-b=2

b=24

So the greatest possible value of 'a' is 26.  

5 0
4 years ago
Please help with this question! I don't know which to choose.
ipn [44]

Answer:

Option 1

Step-by-step explanation:

Counter-intuitively, the correct answer is option 1. Option 2 is obviously a cross section, since it is the shape of the base of the triangle. Option 3 is also obviously a cross section, since the figure is a triangular prism. Option 4 is a cross section because, if you slice diagonally, you may create a cross section with a wider base on the bottom and larger on top. However, it is impossible to create a cross section of a rectangle from this square pyramid. Hope this helps!

7 0
3 years ago
725939 divided by 927
ehidna [41]

Answer:

783

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
What number must you add to complete the square? x2 + 22x = 9
Olegator [25]
<span>x^2 + 22x + 121 = 9 + 121  ..............a^2 + 2ab + b^2 = (a+b)^2

(x + 11)^2 = 130

answer

</span><span>you must add 121  to complete the square</span>
3 0
3 years ago
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