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3 years ago

8

Solve the system of equations by elimination and identify which could be a first step of the elimination method for the system.

3x + 2y = 24 6x + 2y = 30

1 answer:

Alecsey [184]3 years ago

4 0

3x+2y=24
Times 2
6x+4y=48
-
6x+2y=30
=
2y=18
y=9
x=2. Hope it help!

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HELPPPPPP this is due tonight!!!!

laiz [17]

Answer:

(1) Commutative property

(2) Distributive property/Definition of addition

(3) Compatibility with addition/Existence of additive inverse/Modulative property

(4) Compatibility with multiplication/Associative property/Definition of division/Existence of additive inverse/Commutative and modulative properties/Result

Step-by-step explanation:

We proceed to solve algebraically and explain each step:

1) $4\cdot x +1 +x + 3 = -11$ GIven

2) $4\cdot x +x +1 + 3 = -11$ Commutative property

3) $(4+1)\cdot x +4 = -11$ Distributive property/Definition of addition

4) $5\cdot x +4 = -11$ Definition of addition

5) $5\cdot x +4 -4 = -11-4$ Compatibility with addition

6) $5\cdot x = -15$ Existence of additive inverse/Modulative property

7) $\frac{1}{5}\cdot (5\cdot x)= \frac{1}{5}\cdot (-15)$ Compatibility with multiplication

8) $x = - 3$ Associative property/Definition of division/Existence of additive inverse/Commutative and modulative properties/Result

Hence, we have the following answers:

(1) Commutative property

(2) Distributive property/Definition of addition

(3) Compatibility with addition/Existence of additive inverse/Modulative property

(4) Compatibility with multiplication/Associative property/Definition of division/Existence of additive inverse/Commutative and modulative properties/Result

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2 years ago

Suppose SAT scores among college students are normally distributed with a mean of 500 and a standard deviation of 100. If a stud

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Answer:

700-500/500=2

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3 years ago

The pH scale measures how acidic or basic a substance is. Lemon juice is said to have a pH of less than 4 and greater than 1.5.

Vera_Pavlovna [14]

Answer:

1.5<x<4 i hope this is right sorry if its not

Step-by-step explanation:

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Brooklyn is going to invest in an account paying an interest rate of 1.9% compounded continuously. How much would Brooklyn need

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3 years ago

Read 2 more answers

I need to solve for X Y and Z please and thank you

erastovalidia [21]

9514 1404 393

Answer:

x = 5
y = 30
z = 8

Step-by-step explanation:

The rhombus has several relevant properties.

The sides are all the same length
Diagonals are perpendicular bisectors of each other
Diagonals divide the rhombus into congruent triangles

The last of these relations can be used to find x:

7x° = 35°

x = 35°/7° = 5

The second of the relations can be used to find y:

3y° = 90°

y = 90°/3° = 30

The first of the relations can be used to find z:

10z -8 = 5z +32

5z = 40 . . . . . . . . . add 8-5z

z = 40/5 = 8

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2 years ago