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
הS15וה סחרחוווטוורקון
navik [9.2K]

Answer:

what i only speak english

Step-by-step explanation:

8 0
3 years ago
PLEASE HELP INEQUALITYS!!
kolezko [41]
Same i am sorry need point
5 0
3 years ago
The length of a rectangle is 4 less than twice the width. The perimeter of the rectangle is 106 cm. Determine the length of the
horsena [70]

Answer:

Length = 34

Step-by-step explanation:

Perimeter of rectangle = a+a+b+b = 2(a+b)

Let a = length = 2b - 4

Let b = width

Therefore

(2b-4) + (2b-4) + b + b = 106 cm

Bracket off

2b-4+2b-4+b+b = 106cm

Collect like terms

2b+2b+b+b-4-4 = 106cm

6b-8 = 106

6b = 106+8

6b = 114

b = 114÷6

b = 19

To get a

2b - 4

2(19) - 4

38-4

= 34

4 0
3 years ago
Maria’s parents invested 14000 at 6%per year compounded monthly. How much money will there be in the account after 10 years
Oksanka [162]
After 10 years there will be $22,400 in the account.
8 0
3 years ago
What is the equation of a line thats passes through point (10, 5) and is perpendicular to the line whose equation is y=5/4x-2
Sauron [17]

Answer: y = -4x/5 + 13

Step-by-step explanation:

The equation of a straight line can be represented in the slope intercept form as

y = mx + c

Where

c represents the y intercept

m represents the slope of the line.

The equation of the given line is

y = 5x/4 - 2

Comparing with the slope intercept form, slope = 5/4

If two lines are perpendicular, it means that the slope of one line is the negative reciprocal of the slope of the other line.

Therefore, the slope of the line passing through (10, 5) is - 4/5

To determine the y intercept, we would substitute m = - 4/5, x = 10 and y = 5 into y = mx + c. It becomes

5 = - 4/5 × 10 + c

5 = - 8 + c

c = 5 + 8 = 13

The equation becomes

y = -4x/5 + 13

4 0
3 years ago
Other questions:
  • Express 754,000,000 in scientific notation
    14·1 answer
  • More help with math guys, I need all the help i can get
    7·1 answer
  • Number four please help. Whatever helps gets a Brainly award
    6·1 answer
  • Planes A and B intersect in line s. If point V is a point on line s, then it lies on:
    11·1 answer
  • Which of the following is a solution to the inequality graphed below?
    5·1 answer
  • Please Help Me I Need Help
    8·2 answers
  • Multiply. -3 1/3 . -2 2/5
    5·2 answers
  • I need help finding the slope
    15·1 answer
  • If y varies inversely as x, and x= 8 when y = 4, find y when x = 2
    7·2 answers
  • Can you guys help me find a flag that has at least one reflection and a translation in it? If not, then two flags that show thes
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!