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Sonja [21]
3 years ago
13

I can’t figure this out!! please helppp

Mathematics
2 answers:
DaniilM [7]3 years ago
7 0
The third answer thank me later
krok68 [10]3 years ago
3 0

Answer:

The third answer

Step-by-step explanation:

(side note: You probably need to use a calculator that can calculate pi)

The formula to find the area of a circle is pi r squared.

In this case, pi times r squared is 19.63495....... continued

This is probably going to be rounded

so... 19.63

For all of the circles, this is multiplied by 4.

This is 78.52

The area of the square is 100 cm since 10 times 10 is 100

You take 100 cm and then subtract it by 78.54

Voila! now you have 21.46

You might be interested in
What number has exactly 6 factors
RoseWind [281]
The factors of  12  are  1,  2,  3,  4,  6, and  12 .

The factors of  32  are  1,  2,  4,  8,  16, and  32 .
4 0
3 years ago
Read 2 more answers
Brainliest for whoever if they get this CORRECT.
Sergio039 [100]

c

All the information you need is in the quadratic trinomial ... Read from right to left:

Find factors of 49 which ADD (+) to give 14.

These will be  7 and 7  because: 7 × 7 = 49 and 7 + 7 = 14

The + sign shows that the signs in the brackets will be the SAME, the minus (-) shows that they will be negative:

( x − 7 ) ( x − 7 ) = ( x − 7 ) 2

8 0
3 years ago
8. If the discriminant is positive, there will be ______ real solutions.
Deffense [45]

Answer:

2

Step-by-step explanation:

The discriminant is the quantity under the radical in the quadratic formula ...

[tex]x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}[tex]

When that quantity is positive, the square root is real, and the formula gives two real values for x.

6 0
2 years ago
Pls help me guys!<br> Thanks :D Pls help me I'm stuck
MariettaO [177]
C.  21,525 < 22,789 hope this helps 
7 0
3 years ago
Read 2 more answers
How would you do number 12 and 15?
Gnesinka [82]

Answer:

x_1=x_2=-\dfrac{2}{3}

Step-by-step explanation:

For the quadratic equation ax^2+bx+c=0 the discriminant is defined as

D=b^2-4ac

and the quadratic formula for the roots gives us two roots:

x_1=\dfrac{-b-\sqrt{D}}{2a}

and

x_2=\dfrac{-b+\sqrt{D}}{2a}

For the equation 9x^2 +12x+4=0 use quadratic formula to find roots:

D=12^2-4\cdot 9\cdot 4=144-144=0

So,

x_1=x_2=\dfrac{-12\pm \sqrt{0}}{2\cdot 9}=-\dfrac{12}{18}=-\dfrac{2}{3}

7 0
3 years ago
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