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2 years ago

(x + y)2, when x = 6 and y = 9.

Mathematics

2 answers:

guapka [62]2 years ago

7 0

Answer:

Step-by-step explanation:

6+9= 15, 15x2=30

jasenka [17]2 years ago

5 0

Answer in screenshot.

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4x - 2y = -20 7x + 2y = -2

Brut [27]

Answer:

(-2, 6)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Algebra I

Solving systems of equations using substitution/elimination
Solving systems of equations by graphing

Step-by-step explanation:

Step 1: Define systems

4x - 2y = -20

7x + 2y = -2

Step 2: Rewrite systems

4x - 2y = -20

Add 2y to both sides: 4x = 2y - 20
Divide 4 on both sides: x = 1/2y - 5

Step 3: Redefine systems

x = 1/2y - 5

7x + 2y = -2

Step 4: Solve for y

Substitution

Substitute in x: 7(1/2y - 5) + 2y = =-2
Distribute 7: 7/2y - 35 + 2y = -2
Combine like terms: 11/2y - 35 = -2
Add 35 to both sides: 11/2y = 33
Isolate y: y = 6

Step 5: Solve for x

Define original equation: 7x + 2y = -2
Substitute in y: 7x + 2(6) = -2
Multiply: 7x + 12 = -2
Subtract 12 on both sides: 7x = -14
Divide 7 on both sides: x = -2

Step 6: Graph systems

Check the system.

8 0

3 years ago

Write the fact family formed by these numbers 3 9 12

Luba_88 [7]

Answer:

The family formed by these numbers is 3x where x is any integer number.

Step-by-step explanation:

We have been given 3 9 12

We can see that given numbers are multiple of 3 so, we can say that the given numbers are from the family of 3x

Where x is any integer number when multiplied by 3 will give the multiple of 3.

6 0

3 years ago

4. Multiply the two polynomials using the destructive property.5. Are the two products the same when you multiply them horizonta

nikklg [1K]

Given:

$(4x^2-4x)(x^2-4)$

To multiply the two polynomials using the distributive property, we first follow the rule shown below:

For: (a+b)(c+d)=a(c+d)+b(c+d)=ac+ad+bc+bd

We let:

$\begin{gathered} a=4x^2 \\ b=-4x \\ c=x^2 \\ d=-4 \end{gathered}$

Now, we plug in what we know:

$\begin{gathered} (4x^{2}-4x)(x^{2}-4) \\ =(4x^2)(x^2)+(4x^2)(-4)+(-4x)(x^2)+(-4x)(-4) \\ Simplify\text{ and rearrange} \\ =4x^4-16x^2-4x^3+16x \\ =4x^4-4x^3-16x^2+16x \end{gathered}$

Therefore, the answer is:

$=4x^4-4x^3-16x^2+16x$

6 0

1 year ago

How do i solve kx+c=9 for x

lana66690 [7]

$kx+c=9\ \ \ |-c\\\\kx=9-c\ \ \ \ |:k\neq0\\\\\boxed{x=\dfrac{9-c}{k}}$

5 0

3 years ago

Read 2 more answers

Seth started reading his book at 2:50 P.M. At 3:20 P.M. he finished his second chapter and decided to stop for a snack. How long

Vanyuwa [196]

Answer:

30 mins

Step-by-step explanation:

if you add 10 mins to 2:50, it makes it 3:00, then you just add the 10 mins + the 20 mins (after 3pm) and you get 30

7 0

3 years ago