MATHEMATICS MIDDLE SCHOOL

All of my points to anyone who can help me with these..! Marking Brainliest as well

Answers

Answer 1

Answer:

Answer:

1. 186

2. 240

Step-by-step explanation:

1. D =3w+60

D =3(42)+60

D =186

2. I =48t

I =48(5)

I =240

Answer 2

Answer:

Answer:

Question one 186

Question two 240

Step-by-step explanation: You multiply the variable (the letter) by the number that the person is using

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Fred and ethyl had 132 flowers altogether at first. After Fred sold 1/4 of his flowers and Ethyl sold 48 of her flowers, they had the same number of flowers left. How many did they each have at first?

Answers

F + E = 132
3/4 F = E - 48 ( after Fred sold 1/4 of his flowers there is 3/4 flowers left )
--------------------
E = 132 - F
3/4 F = 132 - F - 48
3/4 F + F = 84
7/4 F = 84
F = 84 : 7/4 = 84 * 4/7 = 48
E = 132 - 48 = 84
We can prove it: 3/4 * 48 = 84 - 48
36 = 36 ( correct )
Answer:
Fred had 48 flowers and Ethel 84 flowers.

Fred had 48 flowers.

Ethyl had 84 flowers.

Further explanation

Simultaneous Linear Equations could be solved by using several methods such as :

Elimination Method

Substitution Method

Graph Method

If we have two linear equations with 2 variables x and y , then we need to find the value of x and y that satisfying the two equations simultaneously.

Let us tackle the problem!

Let :

Number of Fred's Flowers = f

Number of Ethyl's Flowers = e

Fred and ethyl had 132 flowers altogether at first.

$f + e = 132$

$f = 132 - e$ → Equation 1

After Fred sold 1/4 of his flowers and Ethyl sold 48 of her flowers, they had the same number of flowers left.

$f - (1)/(4)f = e - 48$

$(3)/(4)f = e - 48$

$(3)/(4)(132 - e) = e - 48$ ← Equation 1

$(3)/(4)(132) - (3)/(4)e = e - 48$

$99 + 48 = (3)/(4)e + e$

$147 = (7)/(4)e$

$e = 147 / (7)/(4)$

$e = \boxed{84}$

$f = 132 - e$

$f = 132 - 84$

$f = \boxed {48}$

Learn more

Perimeter of Rectangle : brainly.com/question/12826246

Elimination Method : brainly.com/question/11233927

Sum of The Ages : brainly.com/question/11240586

Answer details

Grade: High School

Subject: Mathematics

Chapter: Simultaneous Linear Equations

Keywords: Simultaneous , Elimination , Substitution , Method , Linear , Equations

You opened your first savings account 3 months ago. So far, you have earned $9.90 in simple interest, at an annual interest rate of 6%. How much money did you put in the account when you opened it?never mind its $660

Answers

Yea its $660 why did you ask it you can cancel asking it lol

yea it is 660 why did you post it huh

Wildfires in the United States covered three and forty-two hundredths million acres one year. The second year, they covered eight and seventy-one hundredths million acres. The three-year total of wildfire acres burned was twenty-one and forty-sixdths acres. How many acres were burned in year three?

Answers

Everything is in million acres, so we can just drop that while we work it out but just remember we have to add it back on at the end of the problem.

First year 3.42
Second year 8.71
Third year ???

Total 21.46

So...

3.42 + 8.71 + ? = 21.46
12.13 + ? = 21.46
? = 21.46 - 12.13
? = 9.33

The 3rd year 9.33 million acres were burned

*Note I put a ? for the unknown. I could have used x or y or anything else.

A shirt is on sale at a 20% discount. The sales tax is 5%. A new sales clerk simplytakes 15% off the original price. Is this correct? Why?

Answers

Answer:

CLERK’S WAY:

15% of $100 is $15. $100 - $15 = $85. Customer is charged $85 total.

CORRECT WAY:

20% of $100 is $20. $100 - $20 = $80. 5% of $80 is $4. $80 + $4 = $84. Customer is charged $84 total.

Step-by-step explanation:

please rate and maybe branliest

Think about it, If you have a sales tax that means more money going in right? So if you want what the discount is you must subtract the sales tax percentage leaving you with 15%

Jay evaluated the expression 3x(3+12 dived by 3)-4. For his first step, he added 3+12 to get 15. What was Jay's error? Find the correct answer.