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3 years ago

Graph f (x) = -.25x + 4

Mathematics

1 answer:

Charra [1.4K]3 years ago

8 0

Answer:

what is the question.

I am not understand.

please thanks and follow me.

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( I NEED THIS ANSWERED SUPER FAST IM ON A DEADLINE HELP ME!!!)

r-ruslan [8.4K]

The answer to the question is 9/45, 8/40

7 0

3 years ago

which of the following best descirbes the transformation used to obtain the first graph below the second graph y=-|x+1|-3 from y

grin007 [14]

Answer:

a picture would help

Step-by-step explanation:

you need a picture to further understand and answer the question right

7 0

3 years ago

Read 2 more answers

A rectangular box with a square base is to be constructed from material that costs $9 per ft2 for the bottom, $5 per ft2 for the

kramer

Answer:

$18.73ft^3$

Step-by-step explanation:

Let

Side of square base=x

Height of rectangular box=y

Area of square base=Area of top= $(side)^2=x^2$

Area of one side face= $l\times b=xy$

Cost of bottom=$9 per square ft

Cost of top=$5 square ft

Cost of sides=$4 per square ft

Total cost=$204

Volume of rectangular box= $V=lbh=x^2y$

Total cost= $9(x^2)+5x^2+4(4xy)=14x^2+16xy$

$204=14x^2+16xy$

$204-14x^2=16xy$

$y=\frac{204-14x^2}{16x}=\frac{102-7x^2}{8x}$

Substitute the values of y

$V(x)=x^2\times \frac{102-7x^2}{8x}=\frac{1}{8}(102x-7x^3)$

Differentiate w.r.t x

$V'(x)=\frac{1}{8}(102-21x^2)=0$

$V'(x)=0$

$\frac{1}{8}(102-21x^2)=0$

$102-21x^2=0$

$102=21x^2$

$x^2=\frac{102}{21}=4.85$

$x=\sqrt{4.85}=2.2$

It takes positive because side length cannot be negative.

Again differentiate w.r. t x

$V''(x)=\frac{1}{8}(-42x)$

Substitute the value

$V''(2.2)=-\frac{42}{8}(2.2)=-11.55$

Hence, the volume of box is maximum at x=2.2 ft

Substitute the value of x

$y=\frac{102-7(2.2)^2}{8(2.2)}=3.87 ft$

Greatest volume of box= $x^2y=(2.2)^2\times 3.87=18.73 ft^3$

5 0

3 years ago

A truck was carrying 2 and 1/8 tons of sand. When it arrived, only 1 and 1/2 ton of sand were left. How much sand was lost along

erica [24]

I'm pretty sure it's 1 5/8

5 0

3 years ago

The area of Jared’s computer room floor is 168 ft squared. The formula for area of a rectangle is a=l*

Anna [14]

The answer is 12 divide 168 by 14 to get 12.

4 0

3 years ago