All categories

3 years ago

Please find the area

Mathematics

1 answer:

zloy xaker [14]3 years ago

4 0

Answer:

the answer is 6cm like its really obvious

You might be interested in

Helppppppp!!!!!!!!!!

yan [13]

The answer is A, $2 \frac{1}{8}$

Comment the correct answer.

7 0

3 years ago

Read 2 more answers

If x^3+ax^2-18x+b = (x+5)(x-4)(x+2) what is a and b

blondinia [14]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

$(x + 5)(x - 4)(x + 2) =$

$(x + 5) ({x}^{2} - 2x - 8) =$

${x}^{3} - 2 {x}^{2} - 8x + 5 {x}^{2} - 10x - 40 = \\$

${x}^{3} + 3 {x}^{2} - 18x - 40$

_________________________________

Compare :

${x}^{3} + 3 {x}^{2} - 18x - 40$

${x}^{3} + a {x}^{2} - 18x + b$

Thus :

$a = 3$

and

$b = - 40$

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

6 0

3 years ago

A small garden measures 9 ft by 13 ft. A uniform border around the garden increases the total area to 192 ft square. What is the

victus00 [196]

The width of border is 1.5 feet

<h3><u>Solution:</u></h3>

Given that small garden measures 9 ft by 13 ft

A uniform border around the garden increases the total area to 192 ft square

To find: width of border

Let the width of border be "x"

Then the new measures of garden are (9 + 2x) feet and (13 + 2x) feet

The total area of garden = 192 square feet

$(9 + 2x)(13 + 2x) =192$

$117 + 18x + 26x + 4x^2 = 192\\\\4x^2 + 44x - 75 = 0$

<em><u>Let us solve the above equation by quadratic formula</u></em>

$\text {For a quadratic equation } a x^{2}+b x+c=0, \text { where } a \neq 0\\\\x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Using the above formula,

For $4x^2 + 44x - 75 = 0$ , we have a = 4 ; b = 44 ; c = -75

Substituting the values of a = 4 ; b = 44 ; c = -75 in above quadratic formula we get,

$\begin{aligned}&x=\frac{-44 \pm \sqrt{44^{2}-4(4)(-75)}}{2 \times 4}\\\\&x=\frac{-44 \pm \sqrt{1936-1200}}{8}\\\\&x=\frac{-44 \pm \sqrt{3136}}{8}\\\\&x=\frac{-44 \pm 56}{8}\end{aligned}$

$\begin{aligned}&x=\frac{-44+56}{8} \text { or } x=\frac{-44-56}{8}\\\\&x=\frac{12}{8} \text { or } x=\frac{-100}{8}\\\\&x=1.5 \text { or } x=-12.5\end{aligned}$

Since "x" cannot be negative,

we get x = 1.5

Thus width of border is 1.5 feet

4 0

3 years ago

What is the result 75 is decreased by 40%???

Lisa [10]

75 decreased by 40% is 45

3 0

3 years ago

If a triangle is dilated with a scale factor of 3, how is the perimeter of the triangle changed?

ELEN [110]

It’s changed by the perimeter by 2/5

6 0

3 years ago