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GrogVix [38]
3 years ago
5

I'll give you brainliest

Mathematics
2 answers:
postnew [5]3 years ago
7 0

Answer:

HI there I screwd up i dont know the snasdfh

mrs_skeptik [129]3 years ago
4 0

Total of 25 cakes

Tina : placed 0.24.....24%

Dora : placed 9 out of 25.....9/25 = 36%

Wilson : placed 20%

Kane: placed the remainder ...100% - (24% + 36% + 20%) = 20%

Dora placed the most

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25 penalties decreased by 32%?
SCORPION-xisa [38]
Kut 32% off  25

100-32=68% left

=25*0.68

=17
6 0
3 years ago
Let the polynomials A = 7x² + 3xy and B = -3xy .
bija089 [108]

Answer:

– 21x^3 y – 9x^2 y^2 e) is your answer

Step-by-step explanation:

Solve the following system for A and B:

{A = 7 x^2 + 3 x y

B = -3 x y

Express the system in matrix form:

(1 | 0

0 | 1)(A

B) = (7 x^2 + 3 x y

-3 x y)

Write the system in augmented matrix form and use Gaussian elimination:

(1 | 0 | 7 x^2 + 3 x y

0 | 1 | -3 x y)

Collect results:

Answer: {A = 7 x^2 + 3 x y  , B = -3 x y

then we multiply the results (7 x^2 + 3 x y) ( -3 x y) =  – 21x^3 y – 9x^2 y^2

7 0
3 years ago
Aaron and noah wanted to have a contest to see which of their paper airplanes could fly the longest distance. Aaron's plane flew
Marina CMI [18]

Aaron's plane flew 3.21 meters further than Noah's plane.

<u><em>Explanation</em></u>

Aaron's plane flew 4 meters and Noah's plane flew 79 centimeters.

So, first we need to <u>convert 79 centimeters into meters</u>.

We know that, 1 centimeter = 0.01 meter

So, 79 centimeters = (0.01*79)meter= 0.79 meter

Now, the difference of distance between Aaron's plane and Noah's plane is (4-0.79) meters = 3.21 meters

3 0
4 years ago
Is the following a function? Yes or No
Elena-2011 [213]
Yes because all of x are different numbers.
8 0
3 years ago
Read 2 more answers
Find all solutions to the equation in the interval [0, 2π). cos 2x - cos x = 0
Jlenok [28]
This is the concept of algebra, to solve the expression we proceed as follows;
cos 2x-cosx=0
cos 2x=cosx
but:
cos 2x+1=2(cos^2x)
thereore;
from:
cos 2x=cos x
adding 1 on both sides we get:
cos 2x+1=cos x+1
2(cos^2x)=cosx+1
suppose;
cos x=a
thus;
2a^2=a+1
a^2-1/2a-1/2=0
solving the above quadratic we get:
a=-0.5 and a=1
when a=-0.5
cosx=-0.5
x=120=2/3π
when x=1
cos x=1
x=0
the answer is:
x=0 or x=2/3π

4 0
3 years ago
Read 2 more answers
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