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solong [7]
3 years ago
6

What are the zeros of (x-2)(x^2-9)

Mathematics
1 answer:
WARRIOR [948]3 years ago
3 0
(x-2)(x^2-9)=0\iff x-2=0\ or\ x^2-9=0\\\\x-2=0\ \ \ \ |add\ 2\ to\ both\ sides\\\\\boxed{x=2}\\\\x^2-9=0\ \ \ \ |add\ 9\ to\ both\ sides\\\\x^2=9\iff x=\pm\sqrt9\to \boxed{x=-3\ or\ x=3}\\\\Answer:\boxed{x=-3\ or\ x=2\ or\ x=3}
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Sophia already has 22 plants in her backyard, and she can also grow 2 plants with every seed packet she uses. How many seed pack
Alika [10]

Answer:

11

Step-by-step explanation:

she already has 22 plants so 2 times 11 = 22 + the 22 she already has

3 0
2 years ago
How much does mike charge a new customer to ship a package that weighs 50 pounds ? He chargers $40 per pound.
Vera_Pavlovna [14]

Answer:

$2000

Step-by-step explanation:

For each pound, the charge is $40. There are 50 such charges. The point of multiplication is to simplify the process of repeated addition.

... 50 × $40 = $2000

3 0
3 years ago
What is the answer a, b, c, or d
podryga [215]

Answer: Choice B

(-2, 5)

==================================================

Explanation:

The original system is

\begin{cases}-4x+3y = 23\\ x-y = -7\end{cases}

Multiply both sides of the second equation by 3. Doing so leads to this updated system of equations

\begin{cases}-4x+3y = 23\\ 3x-3y = -21\end{cases}

Now add straight down

The x terms add to -4x+3x = -1x = -x

The y terms add to 3y+(-3y) = 0y = 0

The terms on the right hand sides add to 23+(-21) = 2

We end up with the equation  -x = 2 which solves to x = -2

Now use this to find y. You can pick any equation with x,y in it

----------------

-4x+3y = 23

-4(-2)+3y = 23

8+3y = 23

3y = 23-8

3y = 15

y = 15/3

y = 5

Or

x-y = -7

-2-y = -7

-y = -7+2

y = -5

y = 5

Either way, we get the same y value.

So that's why the solution is (x,y) = (-2, 5)

6 0
2 years ago
What is the area of the garden?
xenn [34]

Answer:

42 square meters

Step-by-step explanation:

rectangle: 3 x 6= 18 square meters

square: 4 x 5= 20 square meters

triangle: 4 x 2 x 1/2= 4 square meters

18 + 20 + 4= 42 square meters

8 0
3 years ago
Read 2 more answers
Solve this system of equations.
Rasek [7]

Answer:

for the first one its: y=-3/4x+9

for the second one its: already done

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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