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3 years ago

Factor 20x2y completely

Mathematics

2 answers:

valkas [14]3 years ago

6 0

40xy would be the answer

Naya [18.7K]3 years ago

6 0

If just simply simplifying the answer would be : 40xy

otherwise, this expression cannot be factored with rational numbers b/c the polynomial is not factorable with rational numbers

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A rectangle on a coordinate plane has vertices (-1.1), R(6, 1). S(6.-8), and T(-1,-8). What are the dimensions of the

Monica [59]

Answer:

b. the base is 9 and the height is 6

Step-by-step explanation:

6 0

2 years ago

Given the equation 5x − 4 = –2(3x + 2), solve for the variable. Explain each step and justify your process.

blagie [28]

A.
$5x-4=-2(3x+2) \ \ \ \ \ \ \ \ \ |\hbox{expand the bracket} \\
5x-4=-2 \times 3x-2 \times 2 \\
5x-4=-6x-4 \ \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{add 6x to both sides} \\
11x-4=-4 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{add 4 to both sides} \\
11x=0 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{divide both sides by 11} \\
x=0$

B.
$3(2x-4)=5x-1 \\
6x-12=5x-1 \\
\boxed{11x-12=-1} \Leftarrow \hbox{the first mistake} \\
11x=11 \\
\boxed{x=11} \Leftarrow \hbox{the second mistake}$

Megan's solution isn't correct.
The first mistake: she subtracted 5x from the right-hand side of the equation, but added 5x to the left-hand side.
The second mistake: she divided the right-hand side of the equation by 11, but didn't divide the left-hand side.

The correct solution:
$3(2x-4)=5x-1 \ \ \ \ \ \ \ \ \ \ \ |\hbox{expand the bracket} \\
3 \times 2x+3 \times (-4)=5x-1 \\ 6x-12=5x-1 \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{subtract 5x from both sides} \\
x-12=-1 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{add 12 to both sides} \\
x=11$

3 0

2 years ago

The number of turtles in a pond is four more than twice the number of crocodiles.

cluponka [151]

twice the number is multiplying

so it would be 2c then add 4 more

so 2c+4 is the correct equation.

Answer is B

3 0

2 years ago

Read 2 more answers

Help!!<br> help on 33 please .

oksian1 [2.3K]

Description: They didn't distribute the 3 to both x and 5, so they just had 3x+5.
actual problem:
3(x+5)=3x+15
3x+15=3x+15
subtract 3x from both sides and end up with
15=15

Correct Answer: 15=15

5 0

3 years ago

5. Which point lies on the line: y - 4 = -3(x + 2)?

Karo-lina-s [1.5K]

Answer:

(- 2, 4 )

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

y - 4 = - 3(x + 2) ← is in point- slope form

with (a, b ) = (- 2, 4 )

7 0

2 years ago