MATHEMATICS MIDDLE SCHOOL

If a metal sheet is 1.2mm thick how must be put together to have thickness of 1.44 cm

Answers

Answer 1
Answer:

By stacking 12 metal sheets, each 1.2 mm thick, on top of one another, the combined thickness will be 1.44 cm (14.4 mm).

To achieve a thickness of 1.44 cm, the metal sheets must be stacked on top of each other.

Since the thickness of each individual metal sheet is 1.2 mm, we need to find the number of sheets required to reach 1.44 cm.

First, we convert 1.44 cm to mm, which is 1.44 cm × 10 mm/cm = 14.4 mm.

Next, we divide the total thickness (14.4 mm) by the thickness of each metal sheet (1.2 mm):

Number of sheets = 14.4 mm / 1.2 mm

= 12

Therefore, to achieve a thickness of 1.44 cm, you need to stack 12 metal sheets on top of each other.

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Answer 2
Answer: First convert 1.2mm to cm

10mm = 1cm

so 1.2mm = 0.12cm

Then divide 1.44cm by 0.12cm
that equals to 12.

so you need 12 sheets to make it 1.44cm

Related Questions

What are the verter and x-intercepts of the graph of the function given below?y=x2-2x-35
In parallelogram DEFG, DH = x + 2, HF = 2y, GH = 3x – 3, and HE = 5y + 1. Find the values of x and y. x = 10, y = 18 x = 18, y = 10 x = 20, y = 11 x = 11, y = 20
Solve 4y − y + 11 = 38. 9 −9 3.8 8.6
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Charlene is looking at a pair of earrings that cost $10 find the total cost of the errands if there's a 15% discount in the sales tax is 8% does it matter if the discount is taken before or after the sales tax is added

What are the vertex and x-intercepts of the graph of y= x2 - 6x - 7?Selectone answer for the vertex and one for the x-intercepts.
A. x-intercepts: (1,0), (7,0)
B. Vertex: (3,-16)
C.Vertex: (-3,20)
D. Vertex: (3, 20)
E. x-intercepts: (-1,0). (7.0)
F. x-intercepts: (1.0), (-7,0)

Answers

The vertex and x-intercepts of the graph of y= x^2 - 6x - 7 will be  (3,-16) and (7,-1), respectively.

What are vertex and  x-intercepts of the graph?

A vertex in a quadratic equation is the minimum or maximum point of the equation and  anx-intercept of a graph is the point at which the graph intersects the x-axis.

Vertex form, y=a(x-h)^2+k

We have,

y= x^2 - 6x - 7

Now,

Find the x-intercept  and to find x-intercept put y=0 ;

i.e. y= x^2 - 6x - 7

0= x^2 - 6x - 7

x^2 - 6x - 7=0

Now using Mid-term split method find value of x;

x^2 - 7x+1x - 7=0

x(x - 7)+1(x - 7)=0

(x - 7)(x +1)=0

(x - 7)=0⇒x=7

(x +1)=0⇒x=-1

So, these are the x-intercept (7,-1)of the expression.

Now find the vertex using the above given formula;

y=a(x-h)^2+k

Rewrite in vertex form

y= x^2 - 6x - 7

Add and subtract (-3)^2 in given expression;

y= x^2 - 6x + (-3)^2 -7 - (-3)^2

y = x^2 - 6x + 9 -7 - 9

y = x^2 - 6x + 9 -16

Now convert quadratic part of equation in (a-b)^2;

y = (x-3)^2-16

Now compare it with y=a(x-h)^2+k

We get,  h=3,\ k=-16

So, these are the vertex (3,-16)of expression.

Hence, we can say that the vertex and x-intercepts of the graph of y= x^2 - 6x - 7 will be  (3,-16) and (7,-1), respectively.

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The answer is B and E

For a Supplementary angle, what is THE VALUE OF X in this problem:
(4x + 40)degrees and 3x

Answers

if you add it all together it will be 180 so to work it out you would do this...
7x+40=180
7x=140
x=20

hope this helps :)
a supplementary angle means two angles that equal 180°

 4x + 40 + 3x = 180

7x + 40 = 180
       -40     -40
     ----------------
7x = 140       140 ÷ 7 = 20

the second side of a triangular deck is 5 feet longer than the shortest side,and the third side is 5 feet shorter than twice the length of the shortest side. If the perimeter of the deck is 64 feet,what are the lengths of the three sides

Answers

first (shortest) side = x

second side = x + 5

third side = 2x - 5

the perimeter = 64 ft and is equal x + (x + 5) + (2x - 5)

x + x + 5 + 2x - 5 = 64

4x = 64 |:4

x = 16 ft

x + 5 = 16 + 5 = 21 ft

2x - 5 = 2(16) - 5 = 27 ft

Answer: 16ft, 21ft and 27ft.

Which expression is equivalent to 6(p+5)?
A. 30+6p
B. 30p
C. 30+p
D. 11p

Answers

6(p+5)=6 * p+ 6 * 5=6p+30=\boxed{30+6p} \Leftarrow \hbox{answer A}

3. Which relation is a function?A. {(-3, 4), (-3, 8), (6, 8)}
B. {(3, 4), (-3, 8), (6, 8)}
C. {(-3, 4), (3,-8), (3, 8)}
D. {(-3, 4), (3,5), (-3, 8))​

Answers

Answer:

B

Step-by-step explanation:

Recall that functions are defined only if for each value in the domain produces one and only one value in the range.

If we view the relations in the questions as x-y coordinates, this means that for every x-value, you can only have one y-value

Lets evaluate the options:

A) we can see that for x = -3, this gives 2 possible values for y i.e (-3,4) and (-3,8) (hence this is not a function)

C) we can see that for x = 3, this gives 2 possible values for y i.e (3,-8) and (3,8) (hence this is not a function)

D) we can see that for x = -3, this gives 2 possible values for y i.e (-3,4) and (-3,8) (hence this is not a function)

the only choice where this doesn't occur is choice B

What is the answer to 5/8 . 2/7 and what does the dot stand for the dot is actually a little higher

Answers

First, the dot stands for the "product". You have to multiply.

5/8* 2/7
= [5/ (2*4)]* (2/7)
= 5/4* 1/7 (because 2 and 2 cancel out)
= (5*1)/ (4*7)
= 5/28

The final answer is 5/28~
The dot stands for multiplication
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