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3 years ago

10

True or false? You should always use the pin key on your calculator when finding the volume of a solid

1 answer:

vaieri [72.5K]3 years ago

3 0

Answer:

false

Step-by-step explanation:

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Devon made a box with length x+1, width x+3, and height x-3. What is the volume of Devon's box as a function of x?

erica [24]

Answer:

(a)

$V=x^3+x^2-9x-9$

(b)

$x=10$

(c)

$x=\frac{7}{2}$

Step-by-step explanation:

we are given

length is x+1

$L=x+1$

width is x+3

$W=x+3$

height is x-3

$H=x-3$

(a)

we can use volume formula

$V=L\times W\times H$

now, we can plug it

$V=(x+1)\times (x+3)\times (x-3)$

now, we can simplify it

$V=x^3+x^2-9x-9$

(b)

we are given volume =1001

so, we can set V=1001

and then we can solve for x

$V=x^3+x^2-9x-9=1001$

now, we can factor it

$\left(x-10\right)\left(x^2+11x+101\right)=0$

$x-10=0$

$x=10$

(b)

we are given volume

so, we can set

$V=14\frac{5}{8}=\frac{14\times 8+5}{8}$

$V=\frac{117}{8}$

and then we can solve for x

$V=x^3+x^2-9x-9=\frac{117}{8}$

now, we can factor it

$8x^3+8x^2-72x-189=0$

$\left(2x-7\right)\left(4x^2+18x+27\right)=0$

$2x-7=0$

$x=\frac{7}{2}$

8 0

3 years ago

Simplify the expression 5+(4+x)

photoshop1234 [79]

5 + 4x
I think that’s right

4 0

3 years ago

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HELPPP PLEASEEE FOR 15POINTS

lilavasa [31]

Answer:

I'm not ok. that is too expensive

Step-by-step explanation:

7 0

3 years ago

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Find the value of c that makes each trinomial a perfect square.<br> x^2-13x+c

vova2212 [387]

Answer:

169/4

Step-by-step explanation:

x² - 13x + c

x² -2(x)(13/2) +(13/2)²

(13/2)² = 169/4 or 42 ¼

8 0

3 years ago

$0.15, $0.30, $0.50, $0.75, $0.89<br> I need to know the percent of change for these numbers

Naddik [55]

Answer:

15% 30% 50% 75% 89%

Step-by-step explanation:

u change 0.15 to a function 15/100 then the one hungred below is persent

5 0

3 years ago