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3 years ago

Expand. If necessary, combine like terms (2+x)(2-x)

Mathematics

1 answer:

Anastaziya [24]3 years ago

5 0

Answer:

-x^2+4

Step-by-step explanation:

2*2=4

2(-x)+2(x)=0

x(-x)=-x^2

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Brainly to whomever somehow solves for x. I WILL REPORT SCAMS AND UNHELPFUL "WHAT?" ANSWERS.

cestrela7 [59]

Answer:

$x=\frac{33}{7}$

Step-by-step explanation:

Since ED is parallel to CA, the two triangles in the figure share all 3 angles and therefore must be similar. By definition, the corresponding sides of similar polygons are in a constant proportion.

Therefore, we have:

$\frac{11}{11+x}=\frac{14}{20},\\14(11+x)=20\cdot 11,\\11+x=\frac{20\cdot 11}{14},\\x=\frac{110}{7}-11=\boxed{\frac{33}{7}}$

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3 years ago

What is 45times 67 i need to know please help meeeeeee

Readme [11.4K]

Answer:

3015

Step-by-step explanation:

45×67

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3 years ago

Read 2 more answers

X² + 2x − 8 = 0 (x + _ ) (x - _ ) x = x =

jeka94

Factors of -8 that add up to 2: 4 & -2

(x + 4)(x - 2)

Set x to 0 for both and solve

x = -4

x = 2

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4 years ago

7x − 3(x − 1) = 2(2x + 3)

Arte-miy333 [17]

Answer:

no solution

Step-by-step explanation:

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4 years ago

For the following system, use the second equation to make a substitution for y in the first equation. 3x + y = 2 y + 4 = 3x

expeople1 [14]

First, set the second equation with y as the isolated variable. To do this, subtract 4 from both sides to get
$y = 3x - 4$
Now that you know the value of y, put that expression in for y in the first equation to get
$3x + (3x - 4) = 2$
Then, simplify by adding the x terms together to get
$6x - 4 = 2$
add 4 on both sides to isolate the x terms to get
$6x = 6$

then divide 6 from both sides to get
$x = 1$
Using that x value, plug it into one of the equations as x to find y ( I will use y=3x-4)
$y = 3(1) - 4 = 3 - 4 = - 1$
x=1 and y=-1 is the answer

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3 years ago