Ask question

Ask question

All categories

Paladinen [302]

2 years ago

6

Help please I don’t get it

1 answer:

vodka [1.7K]2 years ago

5 0

Answer:

$12+\frac{1}{4}\cdot12$ $,$ $12\left(1+\frac{1}{4}\right)$ $and$ $12\cdot\frac{5}{4}$

Step-by-step explanation:

$--------------------------------------------$

$\frac{1}{4}$ $of$ $12$ $is$ $3$

$12+3$ = $15$

$--------------------------------------------$

$12+\frac{1}{4}$ = $12.25$ ✘

$12\cdot\frac{1}{4}$ = $3$ ✘

$12+\frac{1}{4}\cdot12$ = $15$ ✔

$12\left(1+\frac{1}{4}\right)$ = $15$ ✔

$12\cdot\frac{3}{4}$ = $9$ ✘

$12\cdot\frac{5}{4}$ = $15$ ✔

$--------------------------------------------$

<em>Sorry that it took long, really wanted to work hard on this one.</em>

$--------------------------------------------$

<em>Hope this helps! <3</em>

$--------------------------------------------$

You might be interested in

What are the solutions of x2 = 8 – 5x? startfraction 5 minus startroot 57 endroot over 2 endfraction comma startfraction 5 start

kondor19780726 [428]

The solution of the given quadratic equation are,

$x=\frac{-5-\sqrt{57} }{2}$ , $x=\frac{-5+\sqrt{57} }{2}$

The equation to solve is given as

$x^2=-5x+8$

Rearrange the given equation in standard form, $ax^2+bx+c=0$

where, a,b and c are constants.

Therefore, we add 5x-8 on both sides to get,

$x^2+5x-8=0$

Here, a=1,b=5 and c=-8

The solution to the above equation is

<h3>What is the quadratic formula?</h3>

$x=\frac{-b\±\sqrt{b^2-4ac} }{2a}$

Use the value of a,b,c in the quadratic formula and solve for x

$x=\frac{-5\±\sqrt{5^2-4(1)(-5)} }{2(1)}$

$x=\frac{-5\±\sqrt{25+35} }{2(1)}$

$x=\frac{-5\±\sqrt{57} }{2(1)}$

Therefore, the solutions are

$x=\frac{-5-\sqrt{57} }{2},x=\frac{-5+\sqrt{57} }{2}$

To learn more about the quadratic equation visit:

brainly.com/question/25841119

5 0

2 years ago

Read 2 more answers

Estimate 874,238 – 228,759 using front-end estimation.

Vikki [24]

i believe it is 645, 500 !

4 0

2 years ago

a taxi cab in myrtle beach charges $2 per mile and $1 for every person. if a taxi cab ride for two people cost $12, how far did

Fiesta28 [93]

Answer:

5 miles

Step-by-step explanation:

If there is 2 people and it costs 12 dollars you will first subtract 2 dolars for each person leaving you with 10 dollars. After that you will divide 10 by 2 for the miles because each mile costs 2 bucks. that will get you to 5 miles

4 0

3 years ago

Read 2 more answers

A rectangular storage container with an open top is to have a volume of 24 cubic meters. The length of its base is twice the wid

Mariana [72]

Answer:

419.25

Step-by-step explanation:

The calculation of the cost of materials for the cheapest such container is shown below:-

We assume

Width = x

Length = 2x

Height = h

where, length = $2 \times width$

Base area = lb

= $2x^2$

Side area = 2lh + 2bh

= 2(2x)h + 2(x)h

= 4xh + 2xh

Volume = 24 which is lbh = 24

$h = \frac{24}{2x^2} \\\\ h = \frac{12}{x^2}$

Now, cost is

$= 13(2x^2) + 9(4xh + 2xh)\\\\ = 13(2x^2) + 9(4x + 2x)\times \frac{12}{x^2} \\\\ = 26x^2 + \frac{648}{x}$

now we have to minimize C(x)

So, we need to compute the C'(x)

$= 52x - \frac{648}{x^2}$

C"(x) $= 52x - \frac{1,296}{x^3}$

now for the critical points, we will solve the equation C'(x) = 0

$= 52x - \frac{648}{x^2} = 0\\\\ x = \frac{648}{52}^{\frac{1}{3}}$

$C" = ((\frac{648}{52} ^{\frac{1}{3} } = 52 + \frac{1296}{(\frac{648}{52})^\frac{1}{3} )^3}\\\\ = 52 + \frac{1296}{\frac{648}{52} } >0$

So, x is a point of minima that is

= $(\frac{648}{52} )^\frac{1}{3}$

Now, Base material cost is

$= 13(2x^2)\\\\ = 26(\frac{648}{52} )^\frac{2}{3}$

= 139.75

Side material cost is

$= \frac{648}{x} \\\\ = \frac{648}{(\frac{648}{52})^\frac{1}{3} }$

= 279.50

and finally

Total cost is

= 139.75 + 279.50

= 419.25

4 0

2 years ago

If Oscar the ostrich travels 78 miles in 2 hours on land, how fast does he travel?

Aleks04 [339]

Speed=distance traveled/time of the travel=78/2=39 mph

3 0

2 years ago