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Alexxandr [17]
3 years ago
12

PLEASE HELP find the sum of (2c+5d) and (6c-8d) ​

Mathematics
1 answer:
liraira [26]3 years ago
7 0
8c-3d is the correct answer
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Solve the given linear Diophantine equation. A) 12x+9y=15 B) 8x+10y=17
Nookie1986 [14]

Answer:

  A) (x, y) = (2-3n, 4n-1) . . . . for any integer n

  B) no solution

Step-by-step explanation:

A) All coefficients have a common factor of 3, so any solution of the reduced equation will be a solution of the given equation. The reduced equation is ...

  4x +3y = 5

A graph of the original shows (x, y) = (2, -1) is a solution. Then other solutions will be those values with a multiple of 4 added to y and the same multiple of 3 subtracted from x:

  (x, y) = (2 -3n, 4n -1)

__

B) The left side of the equation is an even number for any integer values of x and y. The right side is an odd number. There can be no solution.

5 0
3 years ago
Need help with these questions
pochemuha

29) Turns is the ratio of annual amount to average amount.

Cost turns = 57,982.85/15,545 ≈ 3.73

Sales turns = 130,935.60/35,388 ≈ 3.70

30) Consider January of the following year to be month 13.

7/16 to 13/14 is 6 months less 2 days. There are 31 days in July, August, October, and December, so 4 more days than 30 days per month. The total number of days is 6*30 -2 +4 = 182

31) I = Prt = $5380×0.118333×90/360 = $159.16

7 0
3 years ago
Please Help me.<br> .<br> .<br> .<br> .<br> .
avanturin [10]

Answer:

D

Step-by-step explanation:

x^2+2x-5-(-3x^2-4x+1)

x^2+2x-5+3x^2+4x-1

4x^2+6x-6

6 0
3 years ago
Read 2 more answers
A company logo is shaped like an equilateral triangle with 2-in.-long sides. What is the height of the logo? Round to the neares
deff fn [24]

Answer:

B. 1.7 in

Step-by-step explanation:

Divide the triangle into 2 congruent right angle triangles

With hypotenuse: 2

Base: 2/2 = 1

Using pythagoras theorem

2² = 1² + h²

h² = 3

h = sqrt(3)

h = 1.732050808

6 0
3 years ago
Read 2 more answers
Terrence opens a savings account with a deposit of $1000. After 1 year he receives $50 in interest. What is the annual interest
geniusboy [140]

Answer:

Step-by-step explanation:

So, I'm pretty sure this is a problem about compound interest.

The formula for compound interest is A = p(1 + r/n)^nt

For this problem, $1000 is p, the initial amount; A is the total amount, or $1050.

What the problem is asking for is r, the interest rate, which is divided by n. N is the number of times the interest rate is compounded per year; Since the question is asking for the annual interest rate, N would be equal to 1. And because Terrence is has only left his money in for a year, t would also be equal to one.

So, by filling in the formula some, we get this:

$1050 = $1000(1 + r/1)^1*1

To find r, we would need to isolate it in the problem.

1. First, distribute $1000 to the parenthesis(keep in mind that 1000, is also equal to 1000/1:

1050 = (1000 + 1000r/1)^1

2. Then subtract 1000 from both sides:

50 = (1000r/1)^1

3. Multiple both sides by one:

50 = (1000r)^1

4. Divide both sides by 1000:

.05 = r^1 or .05 = r.

The answer is A, 5%.

8 0
4 years ago
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