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3 years ago

Help... pretty pleaseeee

Mathematics

2 answers:

n200080 [17]3 years ago

7 0

The answer to your question is the last one because all the sides are correctly stated as equal to each other

VMariaS [17]3 years ago

3 0

Answer:

I think the answer is the last choice

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50 coins all dimes and quarters total is 10.25 how many dimes?

Yanka [14]

Answer:

You can do these "in your head" like this:

50 dimes would be $5.00

Each quarter adds 15 cents.

10.25 - 55.00 = $5.25 added

Step-by-step explanation:

525/15 = 35 quarters

--> 15 dimes

==========================

or,

d + q = 50

10d + 25q = 1025

etc

8 0

2 years ago

A manufacturer wants to make open tin boxes from pieces of tin with dimensions 8 in. by 15 in. by cutting equal squares from the

Stells [14]

Answer:

$\frac{5}{3}$ in

Step-by-step explanation:

Let x be the side of square.

Length of box=8-2x

Width of box=15-2x

Height of box=x

Volume of box= $L\times B\times H$

Substitute the values then we get

Volume of box=V(x)= $(8-2x)(15-2x)x=(15x-2x^2)(8-2x)$

$V(x)=120x-30x^2-16x^2+4x^3$

$V(x)=4x^3-46x^2+120x$

Differentiate w.r.t x

$V'(x)=12x^2-92x+120$

$V'(x)=0$

$12x^2-92x+120=0$

$3x^2-23x+30=0$

$3x^2-18x-5x+30=0$

$3x(x-6)-5(x-6)=0$

$(x-6)(3x-5)=0$

$x-6=0\implies x=6$

$3x-5=0\implies x=\frac{5}{3}$

Again differentiate w.r.t x

$V''(x)=24x-92$

Substitute x=6

$V''(6)=24(6)-92=52>0$

Substitute x=5/3

$V''(5/3)=24(5/3)-92=-52$

Hence, the volume is maximum at x= $\frac{5}{3}$

Therefore, the side of the square , $x=\frac{5}{3}$ in cutout that gives the box the largest possible volume.

5 0

3 years ago

6 of 8

Masja [62]

Answer:

$\frac{19}{4}$

Step-by-step explanation:

$\frac{5 + 4 + 6 + 6 + 5 + 5 + 4 + 3}{8}$

=38/8

=19/4

4 0

2 years ago

Read 2 more answers

A decorative steel is shown and it is made from circular circle and 6 stems.

STALIN [3.7K]

The total length of the steel used in the frame is 270 cm, if the decorative steel up of 6 stems and each stem is 45 cm.

Step-by-step explanation:

The given is,

Decorative steel made from circular circle of 6 stems

The length of the stem is 45 cm

Step:1

We need to find the total length of the steel used in the decorative steel,

Let, T - Total length of the steel

L - Length of the stem

n - Number of stems used in steel frame

Step:2

Formula to find the total length of the steel is,

$T=$ $l$ × $n$

From given,

$l$ = 45 cm

$n$ = 6 stems

Substitute the values in formula,

$T =$ ( 45 × 6 )

= 270

$T =$ 270 cm

Result:

The total length of the steel used in the frame is 270 cm.

5 0

3 years ago

#6 A bookstore has 15

geniusboy [140]

Answer:330

Step-by-step explanation:

15*22=330

8 0

3 years ago

Read 2 more answers