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
harina [27]
2 years ago
7

Erika calculated that she would spend $115 on school supplies this year. She actually spent $82.50 on school supplies. What is E

rika’s percent of error?
a 28.3%
b 2.8%
c 39.4%
d 32.5%
Mathematics
2 answers:
Sophie [7]2 years ago
7 0

Answer:

The answer is actually C

Step-by-step explanation:

This is because you do 115 - 82.50 = 32.5 then divide by 82.5 = 0.394 multiply by 100 = 39.4%. A lot of people use the theoretical number to divide instead of the actual, because people confuse the number 115 the theoretical number with the actual one. This causes people to use the number 115 to divide when you should use 82.5 to divide.

DerKrebs [107]2 years ago
6 0
The equation to find percent error is:
percent error=(experimental-theoretical)/theoretical *100
So, (115-82.5)/82.5=0.393939*100
39.3939%, or 39.94%

Hope this helps!!
You might be interested in
A regression equation is obtained for a collection of paired data. It is found that the total variation is 20.711 , the explaine
galben [10]

Answer:

0.898

Step-by-step explanation:

The formula for the Coefficient of determination = ratio of explained variation to Total variation

From the above question, we have the following values

Explained variation = 18.592

Total variation = 20.711

The coefficient of determination = 18.592 : 20.711

= 18.592/20.711

= 0.8976872194

Approximately ≈ 0.898

Therefore, the coefficient of determination is 0.898

8 0
3 years ago
PLEASE HELP!!! WILL GIVE BRAINLIEST AWARD FOR BEST EXPLAINED! PLEASE HELP
Arada [10]

Answer:

[1]

Given: (5x^3 + 3x^2 - 7x + 10) - (3x^3 - x^2 + 4x - 1)

Remove the parenthesis, we get;

(5x^3 + 3x^2 - 7x + 10) - (3x^3-x^2+ 4x -1)

5x^3 + 3x^2 - 7x + 10- 3x^3 + x^2- 4x + 1

Like terms are the those terms with same variable and powers.

Combine like terms;

2x^3 + 4x^2 - 11x + 11

To write this polynomial in standard form, you write starting with the term with the highest degree, or exponent(i.e x^3), and then in decreasing order .

Standard form: 2x^3 + 4x^2 - 11x + 11

To, classify a polynomial by degree, you just look at the highest exponent, or degree.

Since, 3 is the highest degree (x^3), it is a cubic.

Now, classify a polynomial by the number of terms, count how many terms are in the polynomial( 2x^3 + 4x^2 - 11x + 11)

Number of terms: 4 (so this is polynomial)

[2]

Similarly,

for  (9w - 4w^2 + 10) + (8w^2 + 7 + 5w)

Remove the parenthesis, we get;

9w - 4w^2 + 10+ 8w^2 + 7 + 5w

Combine like terms; we have

14w + 4w^2 + 17

Standard form: 4w^2 + 14w + 17

Degree of the polynomial is, 2

Number of terms: 3 ( so, this is trinomial)



8 0
3 years ago
Read 2 more answers
Solve it (4+3x) (5)<br><br> Please explain how you got your answer!
natka813 [3]

Answer:

(4 + 3x)(5) \\  = (5 \times 4) +( 5 \times3x) \\  = (20 + 15x)

<h3><u>(20+15x)</u> is the right answer.</h3>
8 0
2 years ago
Read 2 more answers
PLEASE HELP ASAP!!! CORRECT ANSWERS FOR BOTH PART 1 AND 2 ONLY PLEASE!!!
professor190 [17]

1. Answer: Vertical shift up 3 units and vertical stretch by factor of 2

<u>Step-by-step explanation:</u>

f(x) = √x

g(x) = 2√x + 3  

  • adding 3 is a vertical shift up 3 units
  • multiplying by 2 is a vertical stretch by factor of 2

2. Answer: Domain: [0, ∞)

                   Range: [3, ∞)

<u>Step-by-step explanation:</u>

g(x) = 2√x + 3  

Domain: The restriction on "x" is that the radical must be greater than or equal to 0.  So, x ≥ 0  Interval Notation: [0, ∞)

Range: Since the radical must be greater than or equal to 0, then 2√x is also greater than or equal to 0.  Add 3 to that and y ≥ 3.  Interval Notation: [3, ∞)

8 0
3 years ago
What is the GCF 8x^3-20x^2
Kobotan [32]

Answer: 4x^2

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • Jamie purchased a condo in Naples, Florida, for $699,000. She put 20% down and financed the rest at 5% for 35 years. What are Ja
    15·1 answer
  • *PLEASE ANSWER, DIFFICULT QUESTION, ASAP* An ice cream machine offers three flavors: vanilla, chocolate, and strawberry. Each fl
    5·1 answer
  • Two 6-sided dice are rolled. what is the probability that the sum of the two numbers on the dice will be greater than 8?
    14·1 answer
  • For which of the following sequences is it true that every term (after the first one) is 4 less than the previous term
    11·1 answer
  • 3. (02.01)
    8·1 answer
  • The first thing to do if your accelerator sticks is to
    10·1 answer
  • 27x52 distributive property
    10·1 answer
  • Asking for a friend. Someone, please help out. Will give 15 points for it and brainliest when possible.
    7·1 answer
  • Due before 2:30 !! help !!
    7·2 answers
  • Luke can swim 25 laps in one hour
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!