Ask question

Ask question

All categories

3 years ago

12

The perimeter of a rectangular swimming pool is 154m.Its length is 2m more than twice its breadth. What are the length and bread

th of the pool.

1 answer:

TiliK225 [7]3 years ago

3 0

$P = 154\\a = 2b + 2$

a = ?; b = ?

$P = 2(a + b) = 2(2b + 2 + b) = 2(3b + 2) = 6b + 4$

$154 = 6b + 4\\6b = 154 - 4\\6b = 150\\b = 150 : 6\\b = 25$

$a = 2b + 2 = 2 * 25 + 2 = 50 + 2 = 52$

Answer: 25 and 52 m.

You might be interested in

A body moves s metres in a time t seconds so that s = t3 – 3t2 + 8. Find:

aleksandr82 [10.1K]

Answer is<em> </em><em><u>3t²-6t</u></em>

<h3>Step-by-step Explanation:-</h3>

$s(t) = {t}^{3} - 3 {t}^{2} + 8$

Now we need to find velocity. The velocity is the first derivative of position, so let's find the derivative of s(t) :-

$s'(t) = v(t) = 3 {t}^{3 - 1} - 3 \times 2 {t}^{2 - 1}$

So,

$v(t) = 3 {t}^{2} - 6t$

Therefore, <u>v(t) = 3t²-6t</u>

7 0

2 years ago

Drag equations to each row to show why the equation of a straight line is y = mx + b, where m is the slope and b is the y-interc

Alborosie

Answer:

m is the slope because it is affected by the value of x. They are multiplied together and therefore are affected by one another.

The b is the intercept because even when the x value is 0, the value of the y-intercept exists.

6 0

4 years ago

Read 2 more answers

I dont quite understand how to do this

Oxana [17]

Answer:

10

Step-by-step explanation:

substitute -3 in for x

f(-3)=(-3)²+1=

9+1=10

(You can ignore the g(x) part - it has nothing to do with this question.)

6 0

3 years ago

Dan borrow s money to buy a new trumpet $400 at a simple interest rate of 5% he writes the equation t=400 +(0.5×400) to represen

kvasek [131]

<h3>Dan's equation is wrong.</h3>

Step-by-step explanation:

Given, Dan borrows money to buy a new trumpet $400 at simple interest rate of 5% .

${\textrm {simple interest} = \frac{P \times r \times t}{100}$ here P =$400, r = 5% and t = 1

$=\$\frac{400 \times 5 \times 1}{100}$

$=\$(0.05\times 400)$

Therefore he will need to pay back after one year is = 400+(0.05×400)

So, t = 400+(0.05×400)

Dan's equation is wrong.

5 0

3 years ago

What is 32 over 48 simplified and what numbers?

Cloud [144]

32/48 simplified by 16 that equals 2/3

7 0

3 years ago

Read 2 more answers