3 years ago

HELP if correct I give the best rating.

Mathematics

1 answer:

Charra [1.4K]3 years ago

6 0

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If x=-4 what is the value of the following expression?

Gre4nikov [31]

Answer:

2x^2 +3x -2

-22

-46

Step-by-step explanation:

6 0

3 years ago

What two numbers add to 9 and multiply to -70

Alborosie

X, y - the numbers

The numbers add to 9 and multiply to -70.
$x+y=9 \\
xy=-70 \\ \\
y=9-x \\
xy=-70 \\ \\
\hbox{substitute 9-x for y in the second equation:} \\
x(9-x)=-70 \\
9x-x^2=-70 \\
-x^2+9x+70=0 \\
-x^2+14x-5x+70=0 \\
-x(x-14)-5(x-14)=0 \\
(-x-5)(x-14)=0 \\
-x-5=0 \ \lor \ x-14=0 \\
x=-5 \ \lor \ x=14 \\ \\
y=9-x \\
y=9-(-5) \ \lor \ y=9-14 \\
y=14 \ \lor \ y=-5 \\ \\
(x,y)=(-5,14) \hbox{ or } (x,y)=(14,-5)$

The numbers are -5 and 14.

4 0

3 years ago

Quadrilateral P'Q'R'S' is a dilation of the quadrilateral PQRS, with the origin as the center of dilation.

liraira [26]

Answer:

The rule used to create this dilation is 0.5

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Somebody help plz dont get it

fiasKO [112]