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
ArbitrLikvidat [17]
3 years ago
6

I really need help. Solving Systems with Substitution y=2x x+y=(-9)

Mathematics
1 answer:
Viktor [21]3 years ago
6 0

Answer:

Step-by-step explanation:

If you let y=2x, you can plug it into the other equation.

x+2x=-9

Then solve that equation.

3x=-9

x=-3

Then use y=2x to find y.

y=2(-3)=-6

y=-6

You might be interested in
On Monday, Jayla raised $30 and Carlos raised $50.
gayaneshka [121]

Answer:

84 days

Step-by-step explanation:

You would use the LCM to solve this.

12 and 7 don't share any common factors other than 1,

so you would multiply 12 x 7, which gets you 84.

After 84 days they would have raised the same amount.

8 0
3 years ago
Do you like unspeakable keep answers pg plz
suter [353]

Answer:

I like unspeakable! :))

8 0
3 years ago
Read 2 more answers
Negative5 to the negative2 power is what? How do you figure out a negative power?
Paraphin [41]
<span>Scientific NotationDate: 09/16/97 at 00:42:42 From: Aubin Subject: Scientific notation How do you do this problem? I don't understand how you're supposed to get the answer: 5x10 to the 3rd power = 5,000 5x10 to the -3rd power = -5,000 Is this correct? <span>Date: 11/03/97 at 09:56:46 From: Doctor Pipe Subject: Re: Scientific notation Aubin, The first part of what you wrote is correct; 5x10 to the 3rd power = 5,000. The second part is not correct. Writing a negative exponent, such as 10^-3 (read that as ten to the minus third power) is the same as writing 1/(10^3) (read that as one over ten to the third power). Notice that the exponent is negative when writing 10^-3 and positive when writing 1/(10^3) - yet the two numbers are equal. Remember that any number to the zeroeth power, say 10^0, is equal to 1. 10^0 = 1; 5^0 = 1; 275^0 = 1. Remember also that when multiplying two numbers written as base^exponent, if the base in both numbers is equal then we add together the exponents: 10^5 x 10^6 = 10^(5+6) = 10^11. If we have a number 10^5, what number do we multiply it by to get 1? Well, 10^5 x 10^(-5) = 10^(5 + (-5)) = 10^0 = 1. So if 10^5 x 10^(-5) = 1 then 10^(-5) = 1 / 10^5 So, since 10^3 = 1,000 then 10^(-3) = 1/(10^3) = 1/1,000 = 0.001 . It follows from this that: 5x10 to the -3rd power = 5 x 10^(-3) = 5 x 0.001 = 0.005 . The reason for this can be seen by examining what numbers to the right of the decimal point represent. You know what numbers to the left of the decimal point represent: the units digit represents the numeral times 10^0 (any number to the 0th power is 1), the tens digit represents the numeral times 10^1, the hundreds digit represents the numeral times 10^2, and so on. Well, to the right of the decimal point, the tenths digit represents the numeral times 10^-1, the hundredths digit represents the numeral times 10^-2, the thousandths digit represents the numeral times 10^-3, and so on. It's important to understand exponents because exponents allow us to extend the range of numbers that we can work with by allowing us to easily write and work with very large and very small numbers. It's so much easier to write: 10^23 then to write: 100,000,000,000,000,000,000,000 Or to write: 10^(-23) instead of: 0.00000000000000000000001</span></span>
4 0
3 years ago
Find the measure of a supplement of a 20 3/4 degrees
ki77a [65]
20 \frac{3}{4}= \frac{83}{4} \\ \\ 180^{(4}-\frac{83}{4}= \frac{720-83}{4}=\boxed{\frac{637}{4}=159 \frac{1}{4}-the \ suplement}
4 0
3 years ago
Read 2 more answers
In a packet of 40 skittles , 30% are red . How many skittles are not red ?
algol13

Answer:

12

Step-by-step explanation:

I just did the math on how much 30% is in 40 and I got the answer 12 I hope this helps you!

7 0
2 years ago
Other questions:
  • Match the following.
    15·2 answers
  • The coordinates of points M,N, and P are ....
    7·1 answer
  • Three friends shares 6 graham crackers equally how much does each friend get
    13·2 answers
  • Some engines require oil to be mixed with gasoline. For every gallon of gas used, 4 ounces of oil should be added. How much gas
    6·1 answer
  • What is the answer to this equation <br> 1) 4(x + 5) = 40
    8·1 answer
  • 9. A building 62 feet tall casts a shadow 21 meters long. At what angle is the sun shining on the building?
    6·2 answers
  • (0, 15)<br> (15, 0)<br> (4.8)<br> (10.0)<br> Which ones are solutions
    11·1 answer
  • Someone for the love of god please help me.
    7·2 answers
  • The sum of four times Juanita’s age and 16 is 100. Juanita is j years old. How old is Juanita?
    7·1 answer
  • Plxxx help me (Giving brainlyiest)
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!