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bazaltina [42]
3 years ago
11

-y=6 How do I change that -Y to positive ?

Mathematics
2 answers:
andrew-mc [135]3 years ago
6 0
Divide 6 by -1. Remember that -y is really -1y.
ioda3 years ago
5 0
Divide both sides by -1
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30 Points! please help!
SVEN [57.7K]

Answer:

18) 4 * 10 ^ -10

19) t ^ 9

Step-by-step explanation:

18. When multiplying in scientific notation, just multiply the regular numbers together and add the exponents for the tens.

So it'll be 40 * 10^-11

However, the beginning number should have the decimal right after the 4, not any place after (for example, it's 3.056, not 30.56 or 3056.)

To fix this, move the decimal place forward one space from 40. to 4.0, and add 1 to the -11 power.

So the answer is now 4 * 10^-10

19. When dividing exponents, if the base number is the same, you can divide. (Basically, you can not divide x^2 and y^3 because x and y aren't the same)

Since in this case it's t, you can divide.

Dividing exponents is simple: just subtract them.

14 - 5 = 9

so the answer is t ^ 9

3 0
3 years ago
Write a mathematical expression for: the sum of twice a number n and 20.
faust18 [17]
I belive is B hope that helped
5 0
3 years ago
Read 2 more answers
How many solutions are there for the system x^2+4y^2=100 and 4y-x^2=-20
never [62]
There are 5 solutions for this system.

x^2 + 4y^2 = 100  ____1
4y - x^2 = -20  ____2
Add both 1 & 2 together. x^2 gets cancelled
4y^2 + 4y = 80   (send 80 to the other side and divide by 4)
Then equation the becomes : y^2 + y -20 =0
Now factorise the equation: (y+5) (y-4) = 0
Solve for y :  y = -5 and y = 4
Using the values of y to find the values of x. From equation 1:
x^2 = 100 - 4y^2    x = /100 - 4y^2  (/ means square root) Replace values of y
y = -5, x = /100 - 4(-5)^2 = /100 - 100 = 0
y = 4, x = /100 - 4(4)^2 = / 100 - 64 = /36 = -6 or 6
Thus we have 6 solutions y = -5, 4 and x = -6, 0, 6
6 0
3 years ago
47.76 divided by 4.8
Vesna [10]

Answer:

the answer is 9.95

6 0
3 years ago
Read 2 more answers
100 POINTS! SOLVE FOR X. PIC ATTACHED. Random answers will be reported.
Romashka-Z-Leto [24]

Answer:

  • x = 29

Step-by-step explanation:

The angles (2x- 10) and (4x+ 16) are consecutive interior angles and therefore are corresponding

<u>Corresponding angles sum to 180</u>

  • (2x - 10) + (4x + 16) = 180
  • 6x + 6 = 180
  • 6x = 174
  • x = 174/6
  • x = 29
8 0
3 years ago
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