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Citrus2011 [14]
2 years ago
14

Margaret is solving the linear equation 3(x+4)=42 . As she was solving, she took the equation 3(x+4)=42 , performed an algebraic

operation and ended up with 3x+12=42 . Which algebraic property justifies this operation?
A) Multiplication Property of Equality
B) Division Property of Equality
C) Associative Property
D) Distributive Property
Mathematics
2 answers:
kramer2 years ago
7 0

Answer:

D

Step-by-step explanation:

The parenthesis was distributed in order to get 3x + 12

Varvara68 [4.7K]2 years ago
3 0

Answer:

D) Distributive Property

Step-by-step explanation:

3×x=3x

3×4=12

3x+12=42

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Mr. Flanders’ class sold doughnuts for $1.35 each and Mr.Rodriquez’s class sold cartons of milk for $1.08 each together the clas
saul85 [17]

Answer:

Part A: Let, the number of doughnuts = x and the number of carton milk = y.

Part B: We have, Mr. Flanders sold doughnut for $1.35 each and Mr. Rodriquez sold milk for $1.08 each.

As, they sold 85 items in total.

Thus, x + y = 85.

Moreover, they both earned $104.49 in total.

So, 1.35x + 1.08y = 104.49.

Hence, we get the system of equations,

1.35x + 1.08y = 104.49

x + y = 85.

Part C: Now, we will solve the system of equations,

As, x + y = 85 ⇒ y = 85 - x.

As, 1.35x + 1.08y = 104.49 ⇒ 1.35x + 1.08(85-x) = 104.49 ⇒ 1.35x + 91.8 - 1.08x = 104.49 ⇒ 0.27x = 12.69 ⇒ x = 47.

So, y = 85 - 47 ⇒ y = 38.

Thus, x = 47 and y = 38 is the solution.

Part D: Hence, we get that,

Number of doughnuts sold by Mr. Flanders is 47 and the number of carton milk sold by Mr. Rodriquez is 38.

4 0
2 years ago
What statements must be true of an equation before you can use quadratic formula?
Alexus [3.1K]
Before you use the quadratic formula, you have to make sure the equation itself is a quadratic and that a and b are not 0.
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Answer this correct and you are a true legend 9 + 10 = ? ...
S_A_V [24]

Answer:

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Step-by-step explanation:

Logic :)

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Bobby catches 8 passes in 3 football games
netineya [11]

Answer:

24 passes in total

Step-by-step explanation:

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3 years ago
Write as a decimal. If a repeating decimal, round to the nearest hundredth.
Mamont248 [21]

Given:

\frac{475}{80}

Let's evaluate and find the quotient.

We have:

\frac{475}{80}=5.9375

SInce it is not a repeating decimal, we are asked to leave to answer as it is.

A repeating decimal is a decimal with digits or group of digits that repeats endlessly.

The decimal 5.937

ANSWER:

5.9375

6 0
1 year ago
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