1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mamont248 [21]
3 years ago
13

What is the value of y in the equation 6.4x + 2.8y = 44.4, when x = 3?

Mathematics
2 answers:
Aliun [14]3 years ago
8 0

(6.4)(3)+2.8y=44.4

Simplify:

(6.4)(3)+2.8y=44.4

19.2+2.8y=44.4

2.8y+19.2=44.4

Subtract 19.2 from both sides.

2.8y+19.2−19.2=44.4−19.2

2.8y=25.2

Divide both sides by 2.8.

2.8y/2.8 = 25.2/2.8

y=9

gulaghasi [49]3 years ago
4 0
So you've got:

6.4x + 2.8y = 44.4

You want to know the value of (y) when x=3:

6.4 * 3 + 2.8y = 44.4

(6+0.4) * 3 + 2.8y = 44.4

18 + 1.2 + 2.8y = 44.4

19.2 + 2.8y = 44.4

2.8y= 44.4 - 19.2

2.8y = 25.2

y=(25.2)/(2.8)

y=9
You might be interested in
What is the median of the data
erastova [34]

Answer:

5

Step-by-step explanation:

Median is the middle

5 0
2 years ago
Read 2 more answers
As an estimation we are told 5 miles is 8 km. <br> Convert 24 km to miles.
Oksi-84 [34.3K]

Answer:

15

Step-by-step explanation:

24*5=120 / 8 = 15

15 is answer.

3 0
3 years ago
Use the original price and the markup to find the retail price.
Ber [7]

Answer:

$45.15

Step-by-step explanation:

When you are dealing with questions with percents in them—like this one—you have to turn the percent into a decimal. To make 7.5% into a decimal, you move the decimal point 2 spaces to the left. So, 7.5% is also 0.075.

Now, we have to use this formula for these types of questions:

x + x(y)= the price with tax (or markup)

So, we can substitute the variables.

42+42(0.075)=the retail price

42(0.075)=3.15

42+3.15=45.15

So, the retail price will be $45.15

5 0
2 years ago
To make two batches of nut bars jayda needs to use 4eggs. How many eggs are used in each batch of nut bars?
zloy xaker [14]
2 eggs
4÷2=2
happy to help
4 0
2 years ago
Determine the type and number of solutions of 6x^2-7x-4=0.
inessss [21]
2 solutions (X^2) 
The Answer is D. Two Real Solutions

5 0
3 years ago
Other questions:
  • A square with sides of x + 2 and an equilateral triangle with sides of length 2x have equal perimeters.x =124
    10·1 answer
  • You just turned 18, and you can get your own credit card. But, because you are a young person with no credit history your intere
    12·2 answers
  • Please help me if you can
    9·2 answers
  • From the first quiz to the second quiz, a score dropped eight points. The score on the second quiz was 39. What was the first qu
    14·2 answers
  • Hey please help me please
    10·2 answers
  • A baker's bread recipe calls for 3
    10·1 answer
  • John left school with $8.43. He found a quarter on his way home and then stopped to buy an apple for $0.89. How much money did h
    14·2 answers
  • Help me gurlz!!!!!!!!!!!!!!!
    15·1 answer
  • Please help no links
    5·1 answer
  • 2 sides of a triangle have the following measures. Find the range of possible measures for the third side.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!