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
ANTONII [103]
2 years ago
15

~!!!! HELPPPPPPPPP IM IN 7Th GRADE LEARNING 9TH AND 8TH HELP PLEASE !!!!~

Mathematics
1 answer:
Dafna1 [17]2 years ago
5 0

Answer:

Step-by-step explanation:

Plug the point (-1,20) into the equation.

20 = a|-1|+7

13 = a|-1|

13 = a ⋅ 1

a= 13

:::::

(1,20) is another point on the graph.

You might be interested in
Because the graph below is misleading, which magazine appears to have about four times the circulation of Circuitry Today?
OverLord2011 [107]
I think the answer is b
7 0
2 years ago
A body and tackle with a velocity ratio of 5 is used to raise a mass of 50kg through a vertical distance of 20n at a steady rate
matrenka [14]

a. Distance moved by effort = 1 meter

b. Work done by effort = 80 Joules

c. Losses in energy = 18 Joules

<h3>How to determine the parameters</h3>

a. Note that velocity ratio is defined as the ratio of a distance through which any part of a machine moves to the distance moved by its parts

Velocity ratio = distance moved by the effort/distance moved by the body

Where velocity ratio = 5

vertical distance = 20cm

Distance moved by effort = 5 × 0. 20 = 1 meter

b. Formula for work done is given as ;

Work done = Effort × distance moved by effort

Work done = 80 × 1

Work done = 80 Newtons

c. First, let's find the work output

Work output = m g h

Work output = 50 × 9.8 × 0. 20

Work output = 98 Joules

Losses in energy = Work output - work done

Losses in energy = 98 - 80

Losses in energy = 18 Joules

Learn more about work done here:

brainly.com/question/25573309

#SPJ1

7 0
2 years ago
Find the Maclaurin series for f(x) using the definition of a Maclaurin series. [Assume that f has a power series expansion. Do n
Mazyrski [523]

We can use the fact that, for |x|,

\displaystyle\frac1{1-x}=\sum_{n=0}^\infty x^n

Notice that

\dfrac{\mathrm d}{\mathrm dx}\left[\dfrac1{1-x}\right]=\dfrac1{(1-x)^2}

so that

f(x)=\displaystyle\frac5{(1-x)^2}=5\frac{\mathrm d}{\mathrm dx}\left[\sum_{n=0}^\infty x^n\right]

f(x)=\displaystyle5\sum_{n=0}^\infty nx^{n-1}

f(x)=\displaystyle5\sum_{n=1}^\infty nx^{n-1}

f(x)=\displaystyle5\sum_{n=0}^\infty(n+1)x^n

By the ratio test, this series converges if

\displaystyle\lim_{n\to\infty}\left|\frac{(n+2)x^{n+1}}{(n+1)x^n}\right|=|x|\lim_{n\to\infty}\frac{n+2}{n+1}=|x|

so the series has radius of convergence R=1.

5 0
2 years ago
A bag contains 42 red, 45 green, 20 yellow, and 32 purple candies, you pick one candy at random, find the probability that it is
Gnesinka [82]

Answer:

P (green/yellow) = 65/139

Step-by-step explanation:

42 + 45 + 20 + 32 = 139 possibilities

45 + 20 = 65 desired outcomes

65/139


Hope this helps!


3 0
3 years ago
The one is for my younger sis Lindsay has to read a 72-page book in 6 days. If she reads an equal number of pages each day, how
lianna [129]

Answer:

D. she will need to read 12 pages a day

5 0
2 years ago
Read 2 more answers
Other questions:
  • suppose the linear regression line y= 2.4x + 3.1 predicts the time,in minutes it takes you to be served at a food stand if there
    13·2 answers
  • Point H is the incenter of triangle ABC. Find BD. a. 7.5<br> b. 8.5<br> c. 9.2<br> d. 9.7
    6·2 answers
  • If angle ABC = 145º and angle DBC = 113°, find angle ABD
    11·1 answer
  • Four-legged animals run with two different types of motion: trotting and galloping. An animal that is trotting has at least one
    15·1 answer
  • A box of 15 cookies cost nine dollars what is the cost of one cookie
    15·1 answer
  • How would u write 64 square centimeters?Also for my problem would I put 70 feet or 70 square feet?
    6·2 answers
  • Can someone help me with this math homework please!
    6·1 answer
  • Ali wants to rent a bounce house for the cookout.
    13·2 answers
  • What is the vertex of the absolute value function defined by ƒ(x) = |x - 2| - 7?
    14·1 answer
  • I need to know the answer quick
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!