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Anon25 [30]
3 years ago
15

Please answer!! i’ll give brainliest

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
6 0

Answer:

c=-6

Step-by-step explanation:

I used a calculator and paper and a pencil d---------b yeah :D yr welcome

Ok, so you would want to simplify both sides of the equation

(-1/3)(-12) + (1/3)(-12c)=-20 (here you distribute)

4+4c=-20

Then, subtract 4 from both sides

4c+4-4=-20-4

4c=-24

Then divide both sides by 4

4c/4=-24/4

c=-6

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If x, y, and z are positive integers such that xyz+30xy+21xz+2yz+105x+10y+7z=812, find x+y+z.
Ket [755]

Answer:

x= 2, y= 2, and z= 6

Step-by-step explanation:

If this is a Diophantine equation, add 35 to both sides and factor the left:

(3x+1)(2y+7)(z+5) = 847 = 7 times 112

Each integer factorization of 847 into 3 factors leads to a different number/value of x, y, and z. If the first factor, (3x+1), is 1 more than a multiple of 3, and the second factor, (2y+7), is odd, then x, y, and z will be integers.

For example:

847 = 121 times -7 times -1 gives (x, y, z) = (40, -7, -6) because 121 times -7 times -1 is 847 as well, it checks out.

If x, y, and z need to be positive, then the three numbers/factors need to be greater than 1, 7, and 5. The only combination that works is 7 times 11 times 11, which gives (x, y, z) = (2, 2, 6).

:)

6 0
3 years ago
FRACTIONS :::::::<br><br> 8/9 + 7/27 = ??
sammy [17]

Hello there ....

To get the answer, we must do the following to get it:
1.) Find the LCM.
9,18,27
27
The lcm we got is 27... make it your new denominator.

- 8/9 + 7/27 = ?/27 + ?/27 =

2.) Next is, divide the new denominator by the 9 on the 8/9..
= 3
Then, divide the new denominator again by the 27 on the 7/27.
= 1

3.) Multiply the no. you divided by the numberator of 8 by 8/9
=24/27
Then, multiply the no. again you divided by the numerator of 7 by 7/27
=7/27

4.) Add it up.

24/27 + 7/27 = 31/27 ...

It is an improper fraction so we wil just have to divide it.

31 ÷ 27

1 4/27 is the answer to your question.

4 0
3 years ago
Read 2 more answers
A brother and a sister are in the same math class. There are 9 boys and 12 girls in the class. One boy and one girl are randomly
rjkz [21]

Answer:

9 : 12 or 9 to 12

Step-by-step explanation:

7 0
3 years ago
4. Eric has $4,800 that he wants to invest for 4 years. He can invest this amount at his credit union and earn 4 percent simple
NISA [10]

Answer:

See explanation below

Step-by-step explanation:

In order to do this, we just need to calculate the amount of money he'll get after the 4 years, with a simple interest and with the compound anually.

First, let's get the index variation:

4/100 = 0.04 + 1 = 1.04

The amount he will get after the 4 years will be:

P = 4800 * 1.04 * 4 = 19968 $

The interest that the credit union pays will be:

19968 - (4800*4) = 768$

Now as he decides to compound anually, let's get the index variation:

3.65/100 = 0.0365 + 1 = 1.0365

The amount he will get:

P = 4800 * (1.0365)^4 = 5540$

The interest that the bank will pay is:

5540 - 4800 = 740$

Therefore we can conclude that, as Eric decided to invest in the bank, by the end of the 4 years, he will have 28$ less, that if he were decided to invest in the credit union.

7 0
3 years ago
Item 1
Musya8 [376]

Answer:

C = 1.50t + 5

3 0
2 years ago
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