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3 years ago

Help me help me please

Mathematics

2 answers:

SVETLANKA909090 [29]3 years ago

8 0

Answer- 36 square feet hope it helps

never [62]3 years ago

6 0

Answer: 36 square feet

Step-by-step explanation:

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Could somebody check my work and tell me if it's right? If its wrong, please tell me where I went wrong.

vodka [1.7K]

Answer:

it would help if we could see it

4 0

3 years ago

Determine the intercepts of the line x-intercept (__,__) y-intercept (__,__)

Lesechka [4]

x-intercept (-40,0)

y-intercept (0,15)

6 0

3 years ago

Read 2 more answers

Simplify 12√18-6√20-3√50-8√45

Alex_Xolod [135]

12√18-6√20-3√50-8√45

*Break each radical up into the product of a radical of a perfect square and a second radical*

12(√9*√2)-6(√4*√5)-3(√25*√2)-8(√9*√5)

*Simplify the radicals*

12(3√2)-6(2√5)-3(5√2)-8(3√5)

*Distribute*

36√2-12√5-15√2-24√5

*Combine like terms*

21√2-36√5

Hope this helps!!

3 0

3 years ago

EXPLAIN why we placed the value of x= 4/3( the minimum value) into the equ of gradient(dy/dx) [in the answer, marking scheme att

aliina [53]

$y=x(x-2)^2$
$\implies y'=(x-2)^2+2x(x-2)=3x^2-8x+4=(3x-2)(x-2)=0$
$\implies x=\dfrac23,x=2$

are the critical points, and judging by the picture alone, you must have $b=\dfrac23$ and $a=2$ . (You might want to verify with the derivative test in case that's expected.)

Then the shaded region has area

$\displaystyle\int_0^2x(x-2)^2\,\mathrm dx=\dfrac43$

I'll leave the details to you.

Now, for part (iv), you're asked to find the minimum of $\dfrac{\mathrm dy}{\mathrm dx}=y'$ , which entails first finding the second derivative:

$y'=3x^2-8x+4$
$\implies y''=6x-8$

setting equal to 0 and finding the critical point:

$6x-8=0\implies x=\dfrac86=\dfrac43$

This is to say the minimum value of $\dfrac{\mathrm dy}{\mathrm dx}$ *occurs when $x=\dfrac43$ *, but this is not necessarily the same as saying that $\dfrac43$ is the actual minimum value.

The minimum value of $\dfrac{\mathrm dy}{\mathrm dx}$ is obtained by evaluating the derivative at this critical point:

$m=\dfrac{\mathrm dy}{\mathrm dx}\bigg|_{x=4/3}=3\left(\dfrac43\right)^2-8\left(\dfrac43\right)+4=-\dfrac43$

4 0

3 years ago

A rational expression is undefined whenever its numerator is zero.

kipiarov [429]

Answer:

False

Step-by-step explanation:

for a rational number expressed as (A / B) where A & B are integers

if the numerator (A) is zero, then (A/B) is simplify zero

i.e (A / B) = (0 / B) = 0

however if the denominator (B) is zero, then by definition any value divided by zero is undefined.

(A / B) = (A / 0) = {undefined}

7 0

3 years ago