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
Maru [420]
3 years ago
13

Shau-uen solved the equation 18.5 w + 6.5 w minus 2.8 w = 149.1. Her work is shown below.Step 118.5 w + 6.5 w minus 2.8 w = 149.

10Step 225 w minus 2.8 w = 149.1Step 3 Negative 2.8 w = 5.964Step 4w = negative 2.13In which step did Shau-uen make her first error? PLZ HELP FAST
Mathematics
2 answers:
finlep [7]3 years ago
6 0

First step.Addition error

Step-by-step explanation:

Given the equation as;

18.5 w + 6.5 w - 2.8 w = 149.1 add like terms

22.2w=149.1

22.2w/22.2=149.1/22.2

w=6.72

Learn More

Addition in decimals:brainly.com/question/9148823

Keywords: equation, error

#LearnwithBrainly

madam [21]3 years ago
6 0

Answer:

addition error

Step-by-step explanation:

You might be interested in
A group of students plotted the number of hours they worked and the number of hours they spent talking to their friends on the p
deff fn [24]
The correct answer is <span>C:Greater hours worked, fewer hours spent talking on the phone.
</span>

5 0
3 years ago
Read 2 more answers
Which linear inequality is represented by the graph?
Tamiku [17]

Answer:

Option (4)

Step-by-step explanation:

From the graph attached,

A dotted line passes through two points (3, 1) and (-3, -3)

Let the equation of the given line is,

y = mx + b

where 'm' = slope of the line

b = y-intercept

Slope of a line passing through (x_1, y_1) and (x_2,y_2) is,

m = \frac{y_2-y_1}{x_2-x_1}

For the given points,

m = \frac{1+3}{3+3}

m = \frac{2}{3}

y-intercept 'b' = -1

Therefore, equation of the given line will be,

y=\frac{2}{3}x-1

Since graphed line is a dotted line so it's representing an inequality(having < or > sign)

And the shaded part is below the dotted line,

Inequality will be,

y < \frac{2}{3}x-1

Therefore, Option (4) will be the answer.

7 0
3 years ago
Suppose a certain drug test is 85% accurate, meaning that if a person is a user, the result is positive 85% of the time, and if
kakasveta [241]

Answer:

29.411 %  of the result is true.

Step-by-step explanation:

This test's sensitivity is low.

Suppose we have 5 drug users and 85% of the test is accurate meaning that 5* 0.85= 4.25 people are drug users which is true.

But if work for the non users than 5% people being drug users means 95 people are non drug users out of the hundred.

And 85 % accuracy would give  95* 0.85= 80.75 which is very high.

And out of the 80.75 * 15%= 12.11 only 12 are positive .

The results give us  5 out of 17  true possibilities

or 5/17 *100= 29.411 %  of the result is true.

8 0
3 years ago
I have 5 digits. My 4s are worth 4 (10000) and 4 ×10. My 3 is worth 3. The other is worth one tenth as much. My other digit is a
likoan [24]
The number is 40243 :)
hope this helps
4 0
3 years ago
What is the length of the curve with parametric equations x = t - cos(t), y = 1 - sin(t) from t = 0 to t = π? (5 points)
zzz [600]

Answer:

B) 4√2

General Formulas and Concepts:

<u>Calculus</u>

Differentiation

  • Derivatives
  • Derivative Notation

Basic Power Rule:

  1. f(x) = cxⁿ
  2. f’(x) = c·nxⁿ⁻¹

Parametric Differentiation

Integration

  • Integrals
  • Definite Integrals
  • Integration Constant C

Arc Length Formula [Parametric]:                                                                         \displaystyle AL = \int\limits^b_a {\sqrt{[x'(t)]^2 + [y(t)]^2}} \, dx

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

\displaystyle \left \{ {{x = t - cos(t)} \atop {y = 1 - sin(t)}} \right.

Interval [0, π]

<u>Step 2: Find Arc Length</u>

  1. [Parametrics] Differentiate [Basic Power Rule, Trig Differentiation]:         \displaystyle \left \{ {{x' = 1 + sin(t)} \atop {y' = -cos(t)}} \right.
  2. Substitute in variables [Arc Length Formula - Parametric]:                       \displaystyle AL = \int\limits^{\pi}_0 {\sqrt{[1 + sin(t)]^2 + [-cos(t)]^2}} \, dx
  3. [Integrand] Simplify:                                                                                       \displaystyle AL = \int\limits^{\pi}_0 {\sqrt{2[sin(x) + 1]} \, dx
  4. [Integral] Evaluate:                                                                                         \displaystyle AL = \int\limits^{\pi}_0 {\sqrt{2[sin(x) + 1]} \, dx = 4\sqrt{2}

Topic: AP Calculus BC (Calculus I + II)

Unit: Parametric Integration

Book: College Calculus 10e

4 0
3 years ago
Other questions:
  • The triangles are similar. If DE = 24, EF = 42, and AB = 8, find BC
    5·1 answer
  • In addition to the blood types A, B, AB , and O, a person’s blood may be classified as Rh positive or Rh negative. In the United
    10·1 answer
  • What is estimate 353+328
    15·2 answers
  • In a certain city, it was recorded that 7 3/7 inches of rain fell over a 24-hour period. How much rain fell per hour on average?
    8·2 answers
  • 5) You randomly choose a marble from a jar. The jar contains 4 red
    12·2 answers
  • HELP HELP HELP!!
    11·1 answer
  • What is the inequality represented by this graph? (pls help its worth 30 points and ill give brainliest if ur correct :D)
    10·1 answer
  • The sales tax in one state is 7%. Write a function rule for the total cost of an item with selling price x. Find the total cost
    11·1 answer
  • Simplify each expression.
    5·1 answer
  • Isabella makes $15.35 an hour at her company. Skyler, who works at the same company, earns $18.35 an hour. His hourly wage incre
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!