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
Shkiper50 [21]
3 years ago
8

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

Mathematics
1 answer:
Wittaler [7]3 years ago
3 0

ANSWER: y=9

First substitute x

6.4(3)+2.8y=44.4

19.2+2.8y=44.4

subtract 19.2 from both sides

2.8y=25.2

divide by 2.8 on both sides

y=9

You might be interested in
At the beginning of each of her four years in college, Miranda took out a new Stafford loan. Each loan had a principal of $5,500
kaheart [24]

Answer:

D. $31,337.27

Step-by-step explanation:

We have that the initial amount of the loan is $5500.

Miranda took the loan for 4 years. So, the total present value is $5500×4 = $22,000.

The rate of interest on the loan is 7.5% i.e. 0.075 and it was for the duration of 10 years.

Also, it is given that the loan was compounded annually.

We have the formula as,

P=\frac{\frac{r}{n}\times PV}{1-(1+\frac{r}{n})^{-t\times n}}

i.e. PV=\frac{P\times [1-(1+\frac{r}{n})^{-t\times n}]}{\frac{r}{n}}

Substituting the values, we get,

i.e. PV=\frac{P\times [1-(1+\frac{0.075}{12})^{-10\times 12}]}{\frac{0.075}{12}}

i.e. 22000=\frac{P\times [1-(1+0.00625)^{-120}]}{0.00625}

i.e. 22000=\frac{P\times [1-(1.00625)^{-120}]}{0.00625}

i.e. 22000=\frac{P\times [1-0.4735]}{0.00625}

i.e. 22000=\frac{P\times 0.5265}{0.00625}

i.e. P=\frac{22000\times 0.00625}{0.5265}

i.e. P=\frac{137.5}{0.5265}

i.e. P=261.16

Thus, the total lifetime cost to pay of the loans compounded annually  = 261.16 × 120 = $31,339.2

Hence, the total cost close to the answer is $31,337.27

7 0
3 years ago
Read 2 more answers
2. The expression (x-7) is a factor of x^3 - 10x^2 + 11x + 70.
VARVARA [1.3K]

Answer: Try x=3+2 root46 over 5

Or 3-2root46 over 5

Step-by-step explanation:

5 0
3 years ago
Find the interquartile range (IQR) of the data in the dot plot below. 0,1,1,3,3,3,4,5,7
Marizza181 [45]

Answer: the IQR is 3.5

Step-by-step explanation:

6 0
3 years ago
Greta uses 3 cups of pasta for every 3/4 cup of sauce. How much pasta does she use per cup of sauce
boyakko [2]
The answer for this is 4/4 

THANKS!!! 
foxy girl-:)

3 0
3 years ago
Read 2 more answers
Rewrite the expression without using grouping symbols.
Arte-miy333 [17]

Answer:

12x -12*17

Step-by-step explanation:

12(x – 17)

We can distribute the 12 to both terms inside the parentheses

12*x - 12*17

12x -12*17

5 0
3 years ago
Other questions:
  • 155%of 80 is what number
    11·2 answers
  • 3/20 = /40 = 15/.<br><br> Find the missing numerators and denominators.
    8·2 answers
  • Two spinners have been spun 100 times. Using the experimental probabilities below, what is the best guess for the number of time
    13·1 answer
  • Write an equation of the line graphed in slope-intercept form using the variables x and y.
    14·1 answer
  • If two positive angles have a sum of 180 degrees are called
    9·1 answer
  • The inequality 5x - 2y 1 &gt; 0 is satisfied by point (-2, -1). true false
    9·2 answers
  • What is3/4 - 1/2 and what is 7/8-2/3
    12·1 answer
  • The slope and unit rate
    9·1 answer
  • I need to find x in these two problems in the picture.
    6·2 answers
  • I need answer its due today
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!