MATHEMATICS HIGH SCHOOL

Uhh help lol
5.3x + y = 28.5
4.2x + 3.1y = 27.2
find x and y

Answers

Answer 1
Answer:

Answer:

x = 5, y = 2

Step-by-step explanation:

First, isolate y in the top equation.

y = -5.3x+28.5

Next, substitute y in the bottom equation.

4.2x + 3.1(-5.3x + 28.5) = 27.2

5.3x + y = 28.5

Simplify.

4.2x + -16.43x + 88.35 = 27.2

Combine like terms.

-12.23x + 88.35 = 27.2

Isolate x on one side.

-12.23x = -61.15

Isolate x.

x = 5

Substitute x into 5.3x + y = 28.5

5.3(5) + y = 28.5

Simplify.

26.5 + y = 28.5

Isolate y.

y = 2

x = 5 \ny = 2

Related Questions

A violin was on sale of 50% off. the sale price is $50. what was the original price
The art museum had a total of 224 visitors on Tuesday. Visitors older than 18 paid $12 for admission. Visitors 18 years or younger paid $8 for admission. The museum collected a total of $2,520. How many visitors were 18 or younger?
What is 1/3 the sum of 7 and 11?
Traditions Clothing Store is having a sale. Shirts that were regularly priced at $20 are on sale for $17. What is the percentage of decrease in the price of the shirts?
What is the equation of the line, in slope-intercept form, that passes through (3, -1) and (-1,5)? What is the equation of the line, in standard form, that passes through (4, -3) and is parallel to heline whose equation is 4x + y - 2 = 0? Given the line 2x - 3y - 5 = 0, find the slope of a line that is perpendicular to this line.

4) How old am I if 500 reduced by 4 times
my age is 1402

Answers

Answer:

53

Step-by-step explanation:

NEED THE ANSWER FAST

Answers

Your answer is correct! Of the students who live more than one mile away, about 32% ride a bike!

Algebratic simplify exponential expression 2x-5

Answers

2x-5
+2 +2
x=3
2(3)-5=1

Is -55.505 a rational number?

Answers

Answer:

yes

Step-by-step explanation:

Any number that can be written in p/q from is a rational number

Twice the difference of a number and ten is fifty-four. Find the number,

Answers

Answer:

37

Step-by-step explanation:

2(x-10)=54

2x-20=54

2x=74

x=37

After lunch, you need to buy new shoes. You bought a pair last year and they cost $79.00. Now, the same shoes cost $86.00. By what percent has the price increased? Write your answer to 2 decimal places. *

Answers

Answer:

The main answer: $4.84

Step-by-step explanation:

County A: Multiply the price by the sales tax to find out how much money the sales tax will add. Remember to convert percent to decimal!

$75 * 0.0725 = $5.4375

Add the original price and the sales tax.

$75 + $5.4375 = $80.4375

County B: Multiply the price by the sales tax to find out how much money the sales tax will add. Remember to convert percent to decimal!

$70 * 0.08 = $5.6

Add the original price and the sales tax.

$70 + $5.6 = $75.6

Then take the difference.

80.4375 – 75.6 = 4.8375

Round to the nearest hundredth: $4.84
Other Questions
A toddler crawled 3 yards, stopped, then continued to crawl 11 more feet. How many feet did he travel in total?
in a sale all the normal price is reduced by 15% the sale price of a suit is £110.50 work out the normal price
Book club A charges $20 for membership and $2 per book rental. Book club B charges $10 for membership and $3 per book rental. For how many movie rentals will the cost be the same at both book clubs? What does that cost?
What is 6 3/5% as a decimal