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3 years ago

Which number doesn't belong? 9 16 25 43

Mathematics

2 answers:

Alex3 years ago

8 0

Answer:

Step-by-step explanation:

Square root of 9 is 3

Square root of 16 is 4

Square root of 25 is 5

Square root of 43 is not a whole number.

Sauron [17]3 years ago

8 0

Answer:

Step-by-step explanation:

The first three numbers are perfect squares:

9 = 3²

16 = 4²

25 = 5²

43 is not a perfect square.

You might be interested in

Y is inversely proportional to x.

Inessa [10]

Answer:

1. $xy = 63$

2. $y = 3$

Step-by-step explanation:

Given

Variation: inverse Proportion

y = 7, x = 9

Required

- Write an equation connecting y and x

- Find y when x = 21

Given that thee variation is inversely proportional;

This implies that

$y\ \alpha\ \frac{1}{x}$

Convert variation to equation

$y\ = \frac{k}{x}$ ----------- Equation 1

Where k is the constant of variation

Substitute 7 for y and 9 for x in equation 1

$7 = \frac{k}{9}$

Multiply both sides by 9

$9 * 7 = 9 * \frac{k}{9}$

$63 = k$

Substitute 63 for k in equation 1

$y = \frac{63}{x}$

Multiply both sides by x

$x * y = \frac{63}{x} * x$

$xy = 63$

Hence, the equation connecting x and y is $xy = 63$

Solving for when x = 21

Substitute 21 for x in the above equation

$21 * y = 63$

Divide both sides by 21

$\frac{21 * y}{21} = \frac{63}{21}$

$y = 3$

4 0

3 years ago

Complete the ratio and find the answer

elena55 [62]

There are 12 inches in one foot. 120 x 12 = 1,440 inches. The correct ratio to be placed is the 5th one (aka 12 inches over 1 foot).

8 0

3 years ago

Will give brainliest!

miv72 [106K]

Answer:

it means that the roots of the quadratic equation is real and distinct and that means that 40 is a positive value

6 0

2 years ago

Y varies directly as x. If x = 15 when y = 20, find x when y = 30.

Goryan [66]

Answer:

22.5

Step-by-step explanation:

y=kx

20=k15

k=1•33

30=1•33x

x=22•5

5 0

3 years ago

Giải phương trình y'=0 biết:y=x^4

Mila [183]

Answer:

Step-by-step explanation:

1) y'=(x⁴)'=4x³;

2) ∡ y'=0, ⇒ 4x³=0; ⇒ x=0.

7 0

3 years ago