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Lady bird [3.3K]
3 years ago
10

If 30 cookies will serve 10 students, how many cookies are needed for 15 students?

Mathematics
1 answer:
My name is Ann [436]3 years ago
4 0

Answer:

45 cookies is needed for 15 students

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Evaluate for x = 3 and y = 4: x^-2y^2/x^0y^3 1/36 4/9 1024/9
GrogVix [38]

Answer:

\frac{1}{36}

Step-by-step explanation:

Evaluating the numerator and denominator before evaluating

Using the rule of exponents

a^{-n} ⇔ \frac{1}{a^{n} }, a^{0} = 1

Thus

x^{-2}y² ← substitute values into expression

= 3^{-2} × 4² = \frac{1}{9} × 16 = \frac{16}{9}

and denominator

x^{0}y^{3} = 1 × 4³ = 1 × 64 = 64

Now dividing

\frac{16}{9} ÷ 64

= \frac{16}{9} × \frac{1}{64} ( cancel 16 and 64 )

= \frac{1}{9(4)} = \frac{1}{36}

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2 years ago
Jordan has
attashe74 [19]
(1/3)/(5)= 1/3 * 1/5 = 1/15 of a chocolate bar each friend gets
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3 years ago
How long is each side of a square that has an area of 25 meters?
Sergio [31]
The square root of 25 is 5, so each side is 5metres x
4 0
3 years ago
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An office manager needs to decide between two tables for the conference room. One is rectangular, 5 feet wide by 10 feet long. T
zvonat [6]
Radius of circle= 4

a) circle circumference=2(pi)r
circumference=2(pi)4=25.13

P=2W+2L
p=2(5)+2(10)
P=30

b) area of circle=pi(r^2)=pi(16)=50.27
area of rectangle=L×W= 5×10= 50

c) I think you can figure it put
5 0
3 years ago
The legs of a right triangle are 18 centimeters and 80 centimeters long. What is the length of the hypotenuse
Brilliant_brown [7]
a^2 + b^2 = c^2\\\\18^2 + 80^2 = c^2\\\\6724 = c^2\\\\c = \sqrt{6724}\\\\ c = 82

The hypotenuse is 82 centimeters long.
4 0
3 years ago
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