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
Gemiola [76]
3 years ago
15

A sweater is on sale for 20% off the original price, x.

Mathematics
1 answer:
sergey [27]3 years ago
7 0
 a decrease of 20% means u r paying 80%.......so a decrease of 20% is the same as multiplying by 80%
You might be interested in
Select all of the terms that are "like."<br><br> xy2<br> 2xy<br> x2<br> -xy<br> 2x2y<br> 1/2xy
irakobra [83]
Hi,
The like terms are 2xy, -xy and (1/2)xy, since they have the same variables and powers.
4 0
3 years ago
Given vectors u = (−1, 2, 3) and v = (3, 4, 2) in R 3 , consider the linear span: Span{u, v} := {αu + βv: α, β ∈ R}. Are the vec
julia-pushkina [17]

Answer:

(2,6,6) \not \in \text{Span}(u,v)

(-9,-2,5)\in \text{Span}(u,v)

Step-by-step explanation:

Let b=(b_1,b_2,b_3) \in \mathbb{R}^3. We have that b\in \text{Span}\{u,v\} if and only if we can find scalars \alpha,\beta \in \mathbb{R} such that \alpha u + \beta v = b. This can be translated to the following equations:

1. -\alpha + 3 \beta = b_1

2.2\alpha+4 \beta = b_2

3. 3 \alpha +2 \beta = b_3

Which is a system of 3 equations a 2 variables. We can take two of this equations, find the solutions for \alpha,\beta and check if the third equationd is fulfilled.

Case (2,6,6)

Using equations 1 and 2 we get

-\alpha + 3 \beta = 2

2\alpha+4 \beta = 6

whose unique solutions are \alpha =1 = \beta, but note that for this values, the third equation doesn't hold (3+2 = 5 \neq 6). So this vector is not in the generated space of u and v.

Case (-9,-2,5)

Using equations 1 and 2 we get

-\alpha + 3 \beta = -9

2\alpha+4 \beta = -2

whose unique solutions are \alpha=3, \beta=-2. Note that in this case, the third equation holds, since 3(3)+2(-2)=5. So this vector is in the generated space of u and v.

4 0
3 years ago
10x-15=-8x+21 solve this equation
Natasha2012 [34]

Answer:

x=2

Step-by-step explanation:

8 0
3 years ago
Roy Gross is considering an investment that pays 7.6 percent, compounded annually. How much will he have to invest today so that
Debora [2.8K]

Answer: he should invest $16129 today.

Step-by-step explanation:

Let $P represent the initial amount that should be invested today. It means that principal,

P = $P

It would be compounded annually. This means that it would be compounded once in a year. So

n = 1

The rate at which the principal would be compounded is 7.6%. So

r = 7.6/100 = 0.076

The duration of the investment would be 6 years. So

t = 6

The formula for compound interest is

A = P(1+r/n)^nt

A = total amount in the account at the end of t years.

A = 25000

Therefore

25000 = P(1+0.076/1)^1×6

25000 = P(1.076)^6

25000 = 1.55P

P = 25000/1.55

P = $16129

4 0
3 years ago
Klnklnklnklnlklnklnklnklknlknlknlknlknlkn
Aleonysh [2.5K]
I believe the answer is 48 ... hope this helps
5 0
3 years ago
Other questions:
  • What is 14=10×14÷2 ​
    12·1 answer
  • The sum of three consecutive integers is -177. What are those numbers?
    11·2 answers
  • Inez has 27 basketball cards and 45 baseball cards in her card collection. What time is the ratio of Inez’s baseball cards to he
    7·1 answer
  • How do you use the half angle formula for <br> sin (5π/12)?
    5·1 answer
  • PLEASE ASAP, DONT LIE ABOUT THE ANSWER, I'LL KNOW.
    6·1 answer
  • Twenty-five percent of the students had forgotten the year of the Declaration of Independence. If 57 students had not forgotten,
    12·1 answer
  • What number is grater than 1 but less than 7
    9·1 answer
  • How many one third cup serving are in 12 cups of pecans
    5·1 answer
  • An emergency room (ER) nurse noticed that there are an unusually high number of motor-vehicle accident injuries in the month of
    6·1 answer
  • What is the midpoint of a segment in the complex plane with endpoints at 6-2i and -4+6i?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!