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3 years ago

This one as well, does anyone know the answer?

Mathematics

1 answer:

Mashutka [201]3 years ago

5 0

D is the answer to the question

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Help please I don’t understand it

Jlenok [28]

Answer:

15) 30

16) 2

for 15 you plug the -4 into the variable (x)

so...

-4(-4)-4-2-5(-4)

you do multiplication first because of PEMDAS

so -4×-4=16 it is not negative because there 2 negatives so they cancel out

then -5×-4=20

then you get this:

16-4-2+20 which equals 30

then with 16 you do the same. you just put the number for y in the variable y and same with x

5 0

3 years ago

Find the domain of (x,y) → (x + 7, y - 9) with R = {(-3, -14)

MA_775_DIABLO [31]

Answer:

Step-by-step explanation:

x+7=-3

x=-3-7=-10

x=-10

y-9=-14

y=-14+9

y=-5

Domain of (x,y)=(-10,-5)

4 0

3 years ago

How do you write 4 x 4 x 4 x 5 x 5 in index notation

Sonja [21]

Answer:

4^3 x 5^2

Step-by-step explanation:

3 0

3 years ago

What two number multiply to negative 20 and add to 19

OLEGan [10]

$x;\ y-the\ numbers\\\\ \left\{\begin{array}{ccc}xy=-20\\x+y=19&\Rightarrow&x=19-y\end{array}\right\\\\subtitute\ to\ first\ equation:\\\\(19-y)y=-20\\19y-y^2+20=0\\-y^2+19y+20=0\ \ \ |change\ signs\\y^2-19y-20=0\\y^2-20y+y-20=0\\y(y-20)+1(y-20)+0\\(y-20)(y+1)=0\iff y-20=0\ or\ y+1=0\\\\y=20\ or\ y=-1$

$x=19-y\\\\for\ y=20\Rightarrow x=19-20=-1\\\\for\ y=-1\Rightarrow x=19-(-1)=20\\\\Answer:\boxed{\boxed{20\ and\ -1}}$

4 0

4 years ago

What is the volume of a cube with a side length of 3t5units?

Archy [21]

Answer:

C;27t15 units3

Step-by-step explanation:

6 0

3 years ago

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