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3 years ago

How to solve the problem, and complete answer

Mathematics

1 answer:

rusak2 [61]3 years ago

5 0

Notice the picture below

thus, solve for "y"

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The math class is 45 minutes long. If announcements are 5 minutes long, the warm up is 7 minutes long and the notes take 11 minu

atroni [7]

Answer:

22?

Step-by-step explanation:

7 0

4 years ago

The dimensions of a closed rectangular box are measured as 97 cm, 67 cm, and 34 cm, respectively, with a possible error of 0.2 c

Dahasolnce [82]

Answer:

The maximum error in calculating the surface area of the box is $158.4 \:cm^2$ .

Step-by-step explanation:

Differentials are infinitely small quantities. Given a function $y=f(x)$ we call $dy$ and $dx$ differentials and the relationship between them is given by,

$dy=f'(x) \:dx$

If the dimensions of the box are $l$ , $w$ and $h$ , its surface area is $A=2(wl+hl+hw)$ and

$dA=\frac{\partial A}{\partial l}dl+\frac{\partial A}{\partial w}dw+\frac{\partial A}{\partial h}dh\\\\dA=2(w+h)dl+2(h+l)dw+2(w+l)dh$

To find the largest error in the surface area, we therefore use $dl=0.2, dw=0.2, dh=0.2$ together with $l=97, w=67,h=34$

$dA=2(w+h)dl+2(h+l)dw+2(w+l)dh\\\\dA=2(67+34)\cdot 0.2+2(34+97)\cdot 0.2+2(67+97)\cdot 0.2\\\\dA=158.4 \:cm^2$

An error of 0.2 cm in each dimension could lead to an error of $158.4 \:cm^2$ in the calculated surface area.

3 0

3 years ago

Sharon ran 140 meters directly toward school at a constant velocity. She ran that distance in 25 seconds. What was her velocity?

Natali5045456 [20]

Answer:

<h2>5.6 meters/seconds</h2>

Step-by-step explanation:

140 : 25 = 5.6 meters/seconds

<h3>#AyoBelajar</h3>

6 0

3 years ago

Story problem for 14x - 26 =30

dmitriy555 [2]

Answer:

x = 4

Step-by-step explanation:

Hope this helps!

Lmk if you have any questions!

Have a great day! :)

8 0

3 years ago

-5y = -5

Vsevolod [243]

-5y = -5 = 1

7x + 6y = 7

=-1.167

your answer is B) no

4 0

4 years ago