Timothy has computer class 3 times a week. Each class is 45 minutes long. How many hours of computer class does Timothy have per week? In 4 weeks?

Answers

Answer 1

Answer: 18 classes
i might be wrong

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Question 1 A system of equations is shown below:
n = 3m + 6
n − 2m = 2

What is the solution, in the form (m, n), to the system of equations?

(−4, −6)
(−5, −9)
(2, 6)
(1, 8)

Question 2

The incorrect work of a student to solve an equation 2(y + 6) = 4y is shown below:

STEP1: 2(y + 6) = 4y
Step 2: 2y + 8 = 4y
Step 3: 2y = 8
Step 4: y = 4

Which of the following explains how to correct Step 2 and shows the correct value of y?

2 should be distributed as 2y + 12; y = 6
2 should be distributed as 2y + 12; y = 3
The equation should be y + 6 = 4y after division by 2; y = 2
The equation should be y + 6 = 4y after division by 2; y = 1

Question 3
The equation 3.3x − 6.6 = 2.7x can be transformed to form which of the following expressions?

6.0x = 6.6
0.6x = 6.6
6.0x = −6.6
0.6x = −6.6

Answers

Answer:

Part 1: The solution is (-4,-6)

Part 2: 2 should be distributed as 2y + 12; y = 6

Part 3: $\text{The solution is }0.6x=6.6$

Step-by-step explanation:

Part 1: Given the system of equations

$n - 3m = 6$ → (1)

$n - 2m = 2$ → (2)

Solving above two equations

Subtract 2 from 1, we get

$n-3m-(n-2m)=6-2$

$2m-3m=4$

$m=-4$

(1) ⇒ $n=3(-4)+6=-12+6=-6$

The solution is (-4,-6)

Option 1 is correct.

Part 2: The incorrect work of a student to solve an equation 2(y + 6) = 4y

we have to choose the correct step to solve value of y

Equation: 2(y + 6) = 4y

By distributive property

2y+12=4y

2y=12 ⇒ y=6

Hence, 2 should be distributed as 2y + 12; y = 6

∴ Option 1 is correct.

Part 3: Given the equation 3.3x − 6.6 = 2.7x

we have to solve

3.3x − 6.6 = 2.7x

Subtracting 2.7x both sides

$3.3x-2.7x=6.6$

$0.6x=6.6$

Option 2 is correct.

Question 1:
$n = 3m + 6 \nn - 2m = 2 \n \n\hbox{substitute 3m+6 for n in the second equation:} \n3m+6-2m=2 \nm+6=2 \ \ \ \ \ \ \ \ \ \ \ \ \ |-6 \nm=-4 \n \nn=3m+6=3 * (-4)+6=-12+6=-6 \n \n(m,n)=(-4,-6)$

The answer is (-4,-6).

Question 2:
$2(y + 6) = 4y \n2 * y + 2 * 6=4y \n 2y+12=4y \ \ \ \ |-2y \n12=2y \ \ \ \ \ \ \ \ \ \ \ |/ 2 \ny=6$

The answer is: 2 should be distributed as 2y + 12; y = 6.

Question 3:
$3.3x-6.6=2.7x \ \ \ \ |-2.7x \n0.6x-6.6=0 \ \ \ \ \ \ \ \ |+6.6 \n0.6x=6.6$

The answer is 0.6x=6.6.

Simplify
1) 3b + b + 6 =
2)n + 5n - 3c =
3) 12d - 2d + e =

Answers

1. 4b plus 6
2. 6n minus 3c
3. 10d plus e

Answer:

1) 4b +6

2) 6n - 3c

3) 10d +e

Step-by-step explanation:

$25;300% increase can u show me how to do this problem

Answers

The amount that is given in the question = $25
Percentage increase in the amount = 300%
Then
Amount of increase in the amount = (300/100) * 25
   = 3 * 25 dollars
   = 75 dollars
Then
The amount after increase = 25 + 75 dollars
   = 100 dollars
So the final amount after increase of 300% becomes $100. It is important to understand the requirement of the problem first. Once that is understood, the procedure is simple enough for you to understand.

300/100 * 25
300/100 = 3

So now: 3 * 25 = 75

25 + 75 = 100

Add units >>>>> 100 dollars

Answer: 100 dollars

I need help on math?

Answers

Answer:

Step-by-step explanation:

Find the reciprocal. show that the product of the mixed number and its reciprocal is 1.1, 10 1/2
2, 6 3/7
3, 2 8/9
4, 15 1/4
5, 9 2/3
6, 7 5/8

Answers

ummm....I'm still confused what was that question for ....but since u have asked...so here's it .......if ya have any trouble plz feel free to ask me

PLEASE HELP! How do you count (a+2) (b+1) ??

Answers

$(a+2)(b+1)=(a)(b)+(a)(1)+(2)(b)+(2)(1)\n\n=ab+a+2b+2$

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