MATHEMATICS MIDDLE SCHOOL

Which ordered pair in the form (x,y) is a solution of this equation? 7x-5=1A. (-3,-2)
B. (-2,-3)
C. (0,4)
D. (4,0)

Answers

Answer 1
Answer: ANSWER

B. (-2,-3)

EXPLANATION

The given equation is

7x - 5y = 1

We want determine which of the ordered pairs is a solution to the given equation.

For point A(-3,-2)

7( - 3) - 5( - 2) = 1

- 21 + 7 = 1

This statement is false.

For option B(-2,-3)

We have

7( - 2) - 5( - 3) = 1

- 14 + 15 = 1


For option C(0,4)

We have

7(0) - 5(4)=1

0 - 20=1


For option D(4,0)

We have

7(4) - 5(0)=1

28 - 0=1

This statement is false.

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Im having problems with this multiplication

Answers

891 for the 1st one, 597 for the 2nd one.
When multiplying hundreds by ones,you have to take it one by one.

For example,on number 5:

199
x   3

1. Multiply 9 by 3,which equals 27.
199
x   3
  27

2. Add a zero(to show the next placement) and Multiply 9 by 3,which equals 27.

199
x  3
  27
270
 
3. Add two zeros,and multiply 1 by 3,which equals 3.

199
x   3
  27
270
300

4. Now,add it up.

27 + 270 + 300 = 597

Your sum is 597.

Sal bought a house for $78,524.60. Twelve years later he sold the house for 2 3/4 times as much. What was the sale price of the house?

Answers

The sale price of the house was $ 215,942.65

Further explanation

Order of Operations in Mathematics follow this following rule :

  • Parentheses
  • Exponents
  • Multiplication and Division
  • Addition and Subtraction

This rule is known as the PEMDAS method.

In working on a mathematical problem, we first calculate operation that is in parentheses, follow by exponentiation, then multiplication or division, and finally addition or subtraction.

Let us tackle the problem!

Sal bought a house for $78,524.60

\texttt{Initial Price of Sal's House} = \boxed {\$ 78,524.60}

Twelve years later he sold the house for 2³/₄ times as much.

\texttt{Sale Price of Sal's House} = 2(3)/(4) * \texttt{Initial Price of Sal's House}

\texttt{Sale Price of Sal's House} = 2(3)/(4) * \$ 78,524.60

\texttt{Sale Price of Sal's House} = ( 2 + (3)/(4) ) * \$ 78,524.60

\texttt{Sale Price of Sal's House} = ( 2 * \$ 78,524.60 ) + ( (3)/(4) * \$ 78,524.60 )

\texttt{Sale Price of Sal's House} = ( \$ 157,049.2 ) + ( \$ 58,893.45 )

\texttt{Sale Price of Sal's House} = \boxed {\$ 215,942.65}

Learn more

Answer details

Grade: Middle School

Subject: Mathematics

Chapter: Order Of Operations

Keywords: Linear , Equations , 1 , Variable , Line , Gradient , Point , Multiplication , Division , Exponent , PEMDAS , percentange , percent
First a divided 78524.60 by 4 which got me 19631.15. I multiplied 19631.15 and got 58893.45. After that I then multiplied 78524.60 by 2 on a separate problem, I got 157049.20. Then you add 58893.45+ 157049.20 and you get 215942.65.

Sam wrote this expression to describe the number of apples he gave away to his friends. 12 – a Which situation could be described by this expression? A. Sam does not know how many apples he has. He knows he gave away 12 apples. B. Sam knows he has 12 apples left. He does not know how many apples he gave away. C. Sam knows he has 12 apples left. He gave away half of his apples. D. Sam knows he had 12 apples to start. He does not know how many apples he gave away.

Answers

D. Sam knows he had 12 apples to start. He does not know how many apples he gave away.

Because he is subtracting (a) from 12. Meaning he is trying to figure out what (a) is. Hope this helps

Final answer:

The expression 12 - a represents the number of apples Sam gave away to his friends. Option D best describes this situation.

Explanation:

The expression 12 - a represents the number of apples Sam gave away to his friends.

Option D, 'Sam knows he had 12 apples to start. He does not know how many apples he gave away,' best describes this situation. In this case, Sam started with 12 apples but does not know the exact number he gave away.

Learn more about Expressing unknown quantities here:

brainly.com/question/33452636

#SPJ2

What is.

3g-7÷4=8:g=12

Answers

(3g-7)/(4)=8\ /\cdot4\n\n3g-7=32\n\n3g=32+7\n\n3g=39\ /:3\n\ng=13\ \neq \ 12

A youth club has 60 members40 of the members are boys
20 of the members are girls
a mean amount of videos watched last week by all members was 2.8
mean number of videos watched by the boys was 3.3
calculate the mean number of videos watched last week by the 20 girls.
show working out please

Answers

60 times 2.8 = 168 videos watched in total 
40 times 3.3 = 132 videos watched by boys 
168 -132 = 36 videos watched by girls 
36 / 20 = 1.8

A TV at an electronics store originally costs $600, but it is on sale for 30% off. If a customer buying the TV has a coupon for $35.00 off of any purchase, what will her final price be on the TV

Answers

30% of the price is $180, so the result after the first drop is $420. The coupon drops another $35, so the final total is $385.

Answer:

$385

Step-by-step explanation:
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