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3 years ago

3). What is the area of a square with 16cm sides? * Helpppppppppppppppppp

Mathematics

2 answers:

VARVARA [1.3K]3 years ago

7 0

Answer:

Step-by-step explanation:

256

Nadya [2.5K]3 years ago

5 0

Answer:

256

Step-by-step explanation:

16 x 16=256

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Prove that 7-4√7 is irrational

mixas84 [53]

Answer:

hey ;

$7 - 4 \sqrt{7}$

is an irrational number

Step-by-step explanation:

here's the proof in attachment.

i hope it helped........

3 0

3 years ago

The graph below represents which system of inequalities? graph of two infinite lines that intersect at a point. One line is soli

stiks02 [169]

The first line through points (-3, 0) and (-4, -1) is the orange line.

The second line, through (1, 1) and (2, -1) is the purple line.

Since they are both shaded below, the intersection of the shaded regions, is the region colored in blue.

Both lines are included, since they are solid lines.

The equation of the first line can be found as follows:

the slope is $\frac{0-(-1)}{-3-(-4)}=\frac{1}{1}=1$ , thus, the equation is:
$y-0=1(x-(-4))\\\\y=x+4$

The equation of the second line can be found as follows:

the slope is $\frac{1-(-1)}{1-2}= \frac{2}{-1}=-2$ ,

thus the equation of the second line is :

$y-1=-2(x-1)\\\\y-1=-2x+2\\\\y=-2x+3$

We have to decide on the direction of the inequality sign, so we pick a point, for example (0, 4) which is not in the colored regions of the lines,

so we write the inequalities so that they do not hold for (0, 4)

line 1:

y≥x+4

4≥0+4=4 is true, so we change the sign and write : y≤x+4

similarly, line 2:

y≤-2x+3

4≤-2*0+3=3, which is not true, so we have the correct direction.

Note that since the lines were solid, we include the equality case:

Answer:

the shaded region is the solution to the system of inequalities:

i) y≤x+4
ii) y≤-2x+3

3 0

3 years ago

Read 2 more answers

4 loads of stone weigh 2/3 ton. Find the weight of 1 load of stone.

Vladimir79 [104]

To find the weight of 1 load of stone, divide 2/3 by 4.

To divide fractions, use keep change flip.

Keep the first fraction the same, change the division sign into a multiplication sign, and flip the second fraction.

I attached the work and answer for this problem. If you have any questions please feel free to ask.

Hope this helps.

7 0

3 years ago

The length of a rectangle is 3 times the width.the permitted of the rectangle is 72ft find the dimensions of the rectangle

ArbitrLikvidat [17]

Lets set up the relationship of the length to width:

l = 3w

Using this, we can make all the variables the same by substitution:

2l + 2w = perimeter
2l + 2w = 72
2(3w) + 2w = 72
6w + 2w = 72
8w = 72
w = 9

The width is 9, to the length must be 9*3, or 27.

Hope this helped!

4 0

3 years ago

At what angle θ1 to the normal would the first dark ring be observed?

sukhopar [10]

(180/pi)* asin(1.22*0.0006328/D_1)= 0.385 degree

4 0

3 years ago