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natima [27]
2 years ago
15

Find the area of these shapes:

Mathematics
2 answers:
Phantasy [73]2 years ago
7 0

Answer:

4. 25.12 cm²

5. 28.56 cm² (square = 16 cm²) (semi-circle = 12.56 cm²)

Step-by-step explanation:

vazorg [7]2 years ago
6 0
4. pi*4^2= 50.265
50.265/2=25.133

5. 4^2=16
pi*2^2=12.566
12.566/2=6.283
16+6.283=22.283
You might be interested in
Which is an ordered pair on the line 2.5,14 2.25,12 1.25,5 1.5,9
Savatey [412]
I would think that all but one point would be on the line.  One way to approach this problem is to find the equation of the line based upon any two points chosen at random, and then determine whether or not the other points satisfy this equation.  Next time, would you please enclose the coordinates of each point inside parentheses:  (2.5,14), (2.25,12), and so on, to avoid confusion.
                                                               14-12
slope of line thru 1st 2 points is   m = ----------------  =  2/0.25 = 8
                                                              2.50-2.25

What is the eqn of the line:     y = mx + b becomes

                                               14 = (8)(2.5) + b; find b:

14-20 = b = -6.  Then,   y = 8x - 6.

Now determine whether (12,1.25) lies on this line.  

Is 1.25 = 8(12) - 6?  Is 1.25 = 90?  No.  So, unless I've made arithmetic mistakes, (1.25, 5) does not lie on the line thru (2.5,14) and (2.25,12).

Why not work this problem out yourself using my approach as a guide? 



5 0
3 years ago
(-4,9), (-4 -3), and (-1, 9) what is the area?
Gnesinka [82]
The area of it is 18
5 0
3 years ago
Write an equation in standard form given: m= -3/4 and b=5.
Dmitry [639]

Answer:

3x+4y=20

Step-by-step explanation:

The slope-intercept equation would be:

y=mx+b

y=-3/4(x)+5

But standard form is

ax+by=c

We can obtain this by moving the -3/4(x) to the left side

\frac{3x}{4} +y=5

Multiply both sides by 4 to get rid of the fraction

3x+4y=20

5 0
2 years ago
PLEASE HURRY! I NEED AN ANSWER, THANKS! :)
Svetradugi [14.3K]

Answer:  D) Inverse does not exist

<u>Step-by-step explanation:</u>

The top row is 0 0 , which makes the determinant equal to zero.

The reciprocal of 0 is undefined so there cannot be an inverse for this matrix.

5 0
3 years ago
I have an equation the first one says x+y=-9 and then 5x-2y=32 and idk how to answer it
horsena [70]
Put in slope intercept form so the first equation would be y=-x-9 then the second one will be y=-5/2x-16
7 0
3 years ago
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