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
photoshop1234 [79]
3 years ago
5

What is the solution of the system? {5x−y=−21 {x+y=−3

Mathematics
2 answers:
Mekhanik [1.2K]3 years ago
7 0
X+y=-3 answer: x=-3+-1y
love history [14]3 years ago
5 0

Answer:

(-4,1)

Step-by-step explanation:

I just took the quiz. Hope this helps!

You might be interested in
You have 3/4 of a bag of popcorn. You want to share them with you and your three friends. How much of the bag does each person g
zheka24 [161]

Answer:

1/4

Step-by-step explanation:

3 0
3 years ago
9 x 10 to the power of 2 how many times as much as 3 x 10 to the -2 power
hjlf

Answer:

  3×10^4

Step-by-step explanation:

The desired factor is found by calculating the ratio of the two numbers:

  k = (9×10^2)/(3×10^-2) = (9/3)×10^(2 -(-2)) = 3×10^4

The first number is 3×10^4 = 30,000 times as much as the second number.

6 0
2 years ago
The distributive property combines blank and blank to make multiplying whole numbers simpler.
laila [671]
The distributive property combines multiplication with addition and multiplication with subtraction together in order to simplify the equation. It is named as such because the number outside of the open and close parenthesis are distributed to the terms inside. Say for example, the equation given is 5(2x - 3). According to the distributive property, you distribute 5 by multiplying to each of the terms inside the parentheses. The solution would be: 5*2x + 5*-3 = 10x - 15. As you can see, it involved multiplication with addition and subtraction. Generally, you just have to add all the terms while making sure you carry the sign of the integer along when you multiply them just as shown in my example.
3 0
4 years ago
Need help pls<br>thank you in advance ​
ira [324]

Answer:

<h3><u>Mean</u></h3>

<u />

\textsf{Mean}\:\overline{X}=\sf \dfrac{\textsf{sum of all the data values}}{\textsf{total number of data values}}

\implies \sf Mean\:(Nilo)=\dfrac{5+6+14+15}{4}=\dfrac{40}{4}=10

\implies \sf Mean\:(Lisa)=\dfrac{8+9+11+12}{4}=\dfrac{40}{4}=10

<h3><u>Standard Deviation</u></h3>

\displaystyle \textsf{Standard Deviation }s=\sqrt{\dfrac{\sum X^2-\dfrac{(\sum X)^2}{n}}{n-1}}

\begin{aligned}\displaystyle \textsf{Standard Deviation (Nilo)} & =\sqrt{\dfrac{(5^2+6^2+14^2+15^2)-\dfrac{(5+6+14+15)^2}{4}}{4-1}}\\\\& = \sqrt{\dfrac{482-\dfrac{40^2}{4}}{3}}\\\\& = \sqrt{\dfrac{82}{3}}\\\\& = 5.23\end{aligned}

\begin{aligned}\displaystyle \textsf{Standard Deviation (Lisa)} & =\sqrt{\dfrac{(8^2+9^2+11^2+12^2)-\dfrac{(8+9+11+12)^2}{4}}{4-1}}\\\\& = \sqrt{\dfrac{410-\dfrac{40^2}{4}}{3}}\\\\& = \sqrt{\dfrac{10}{3}}\\\\& = 1.83\end{aligned}

<h3><u>Summary</u></h3>

Nilo has a mean score of 10 and a standard deviation of 5.23.

Lisa has a mean score of 10 and a standard deviation of 1.83.

The <u>mean</u> scores are the <u>same</u>.

Nilo's standard deviation is higher than Lisa's.  Therefore, Nilo's test scores are more <u>spread out</u> that Lisa's, which means Lisa's test scores are more <u>consistent</u>.

5 0
2 years ago
The regular price of a sweater is $42.99. It is on sale for 20% off. Find the amount of discount and the sale price
elena-14-01-66 [18.8K]

Answer:

34.392, 20%= 8.598

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • How many miles are equivalent to 89,760 feet?
    7·2 answers
  • Anthony Rizzo attended art class every 3 weeks, chess club every 4 weeks, and fencing every 9 weeks. When will he attend all thr
    8·1 answer
  • Which function has an inverse that is also a function?
    9·2 answers
  • Please solve and explain how. Photo attached
    9·1 answer
  • Multiply. –6 • (–13)
    11·1 answer
  • 11x - 4 = 5x + 20<br><br> How do I do this question/what is the answer?
    8·2 answers
  • HELP Pllllllzzzzz <br> thank you have a great day
    6·1 answer
  • Can somebody please give me an example of simplifying fractions? its for my math project.
    15·2 answers
  • Will bought a new skateboard that was on sale. The original price of the skateboard was $60. The store had marked it down by 20
    15·2 answers
  • Q1. The speed limit on a road is 40km/h. A scooter drives 9
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!