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2 years ago

What is the area of the real backyard?

Mathematics

1 answer:

prohojiy [21]2 years ago

7 0

50 meters, because if 4cm is 5 m, then it would be 5( 4cm, which equals 5m) multiplied by 10( 8cm÷4cm= 2. 2×5m= 10). So 5m × 10m = 50m. Hope this helps!

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6. which solid did the net form

In-s [12.5K]

Answer:

Hexagonal Pyramid

5 0

2 years ago

Find a positive number for which the sum of it and its reciprocal is the smallest (least) possible. Let x be the number and let

Allisa [31]

Answer:

$S(x) = x + \frac{1}{x}$ --- Objective function

Interval = $\{x:x=1\}$

Step-by-step explanation:

Given

Represent the number with x

The required sum can be represented as:

$x + \frac{1}{x}$

Hence, the objective function is:

$S(x) = x + \frac{1}{x}$

To get the the interval, we start by differentiating w.r.t x

Using first principle, this gives:

$S'(x) = 1 - \frac{1}{x^2}$

Equate S'(x) to 0 in order to solve for x

$0 = 1 - \frac{1}{x^2}$

Subtract 1 from both sides

$0 -1 = 1 -1 - \frac{1}{x^2}$

$-1 = - \frac{1}{x^2}$

Multiply both sides by -1

$1 = \frac{1}{x^2}$

Cross Multiply

$x^2 * 1 = 1$

$x^2 = 1$

Take positive square root of both sides because x is positive

$\sqrt{x^2} = \sqrt{1$

$x = 1$

Representing x using interval notation, we have

Interval = $\{x:x=1\}$

To get the smallest sum, we substitute 1 for x in $S(x) = x + \frac{1}{x}$

$S(1) = 1 + \frac{1}{1}$

$S(1) = 1 + 1$

$S(1) = 2$

Hence, the smallest sum is 2

3 0

3 years ago

Write and solve the following expression: The sum of 7 and twice a number is 15

Nastasia [14]

Answer:

It would be 7 + 2x = 15

8 0

2 years ago

Any help would be nice :)

yaroslaw [1]

Answer:

Step-by-step explanation:

7 0

2 years ago

A town has a population of 50,000. it’s rate increase is 8% every 6 months. find the population after 4 years

Ainat [17]

82,000 bc 8% of 50,000 is 4000 and 4000 times 8 is 32,000 + 50000

6 0

2 years ago