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Murljashka [212]

3 years ago

11

I need answers for the question below to end a debate. Explain why that is the answer too.

2 answers:

IRINA_888 [86]3 years ago

7 0

PEMDAS. Parenthesis comes first. 3+2 = 5 which is then multiplied to 6/2 which is 3 so 3 x 5 is 15.

Snezhnost [94]3 years ago

3 0

Simplify:

6/2( 3 + 2)

= 3(3 + 2)

= (3)(5)

= 15

Answer is 15

The order of operations, or PEMDAS (Please Excuse My Dear Aunt Sally): Rule that prioritize sequence of operations starting from most important to least important.

Step 1: Do as much as you can to simplify everything inside the parenthesis

Step 2: Simplify every exponential in the numerical expression.

Step 3: Multiply, and Divide whichever comes first from left to right.

Step 4: Add, and Subtract whichever comes first from left to right

PEMDAS is a mnemonic device that can help you to remember the order of operations.

Please - Parenthesis
Excuse - Exponents
My - Multiplication
Dear - Division
Aunt - Addition
Sally - Subtraction

Hope that helps!!!!!!

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Which products result in a difference of squares? Check all that apply. (5z + 3)(–5z – 3) (w – 2.5)(w + 2.5) (8g + 1)(8g + 1) (–

Helen [10]

Answer:

Option 2 $(w-2.5)(w+2.5)=w^2-2.5^2\\$ and option 4 $(-4v-9)(-4v+9)=-(4v+9)(-)(4v-9)=4v^2-9^2$

Explanation:

In option 1 $(5z+3)(-5z-3)=-(5z+3)(5z+3)=-(5z+3)^2$ which is not the difference of squares

In option 2 $(w-2.5)(w+2.5)=w^2-2.5^2\\$ using the formula

$(a+b)(a-b)=a^2-b^2\\Here \\a=w,b=2.5$

Clearly, the difference of squares

In option 3 $(8g+1)(8g+1)=(8g+1)^2$ not the difference of squares

In option 4 $(-4v-9)(-4v+9)=-(4v+9)(-)(4v-9)=4v^2-9^2$

Clearly the difference of squares

In option 5 $(6y+7)(7y-6)=42y^2+13y-42$ not the difference of squares

In option 6 $(p-5)(p-5)=(p-5)^2$ not the difference of squares

4 0

4 years ago

Read 2 more answers

You invest $25/month at a rate of 3.25% APR compounded monthly for 30 years. What is the total interest earned and final balance

VikaD [51]

The total interest earned is 40.75 and the final balance is 65.75

<u>Solution:</u>

Given, principle amount P = 25

Interest rate $r = 3.25\% = \frac{3.25}{100} = 0.0325$

Times compounded per year n = 12

Time in years t = 30

$Amount \ A=P\left(1+\frac{r}{n}\right)^{n t}$

On substituting the values we get

$A = 25 [ 1+ \frac{0.0325}{12}]^{12\times30}= 25 [2.63]= 65.75$

Interest I = A - P [since, A = P+I]

$\Rightarrow 65.75 - 25= 40.75$

7 0

3 years ago

The cost for a pack of 7 padlocks to $23.80. Find the unit price in dollars per padlock. If necessary, round your answer to the

Galina-37 [17]

It asks to "Find the unit price in dollars per padlock"

The phrasing "dollars per padlock" is the same as "dollars per 1 padlock"

In other words, the teacher wants to know how much 1 padlock costs.

7 padlocks : $23.80

7/7 padlocks : $23.80/7 .... divide both parts by 7

1 padlock : $3.40

We see that 1 padlock costs $3.40, so the unit cost is $3.40 per padlock

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3 years ago

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disa [49]

Answer:

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6 0

2 years ago

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kakasveta [241]

Answer:

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6 0

4 years ago