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
Soloha48 [4]
3 years ago
13

The sum of (-9) and a number (n) is multiplied by 1/2. the result is 20. what is the number?

Mathematics
2 answers:
Fittoniya [83]3 years ago
7 0

Answer:

49

Step-by-step explanation:

Sum means add

-9+n

Multiply this by 1/2

1/2(-9+n)

This is equal to 20

1/2(-9+n) = 20

Solve

Multiply each side by 2 to get rid of the fraction

2*1/2(-9+n) = 20*2

-9+n = 40

Add 9 to each side

-9+9 +n = 40+9

n = 49

OLga [1]3 years ago
6 0

Answer:

Step-by-step explanation:

1/2(-9+n)=20

n=40+9

n=49

You might be interested in
Contains the point (-1, 2) and is parallel to<br> x – 2y = -3
ivanzaharov [21]

Answer:

see explanation

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Rearrange x - 2y = - 3 into this form

Subtract x from both sides

- 2y = - x - 3 ( divide all terms by - 2 )

y = \frac{1}{2} x + \frac{3}{2} ← in slope- intercept form

with m = \frac{1}{2}

• Parallel lines have equal slopes, thus

y = \frac{1}{2} x + c ← is the partial equation

To find c substitute (- 1, 2) into the partial equation

2 = - \frac{1}{2} + c ⇒ c = 2 + \frac{1}{2} = \frac{5}{2}

y = \frac{1}{2} x + \frac{5}{2} ← in slope- intercept form

Multiply through by 2

2y = x + 5 ( subtract 2y from both sides )

0 = x - 2y + 5 ( subtract 5 from both sides )

- 5 = x - 2y, thus

x - 2y = - 5 ← in standard form

4 0
3 years ago
I NEED THE ANSWER TO THIS NOW
Mandarinka [93]

i think the answer is the 3rd one

plz give me brainliest

3 0
3 years ago
Work out the area of a rectangle with base, b = 32mm and perimeter, P = 82mm.​
Amanda [17]
Perimeter = 2base + 2base
82 - 2(32) = 18 : 2 = 9
area = 9*32 = 288mm^2
7 0
2 years ago
Read 2 more answers
A student writes the equation for a line that has a slope of -6 and passes through the point (2, –8). y -(-8) = -6(x - 2) y -(-8
Mice21 [21]
Y - (-8) = -6 (x-2) is correct everything else is not
y + 8 = -6x + 12
y +:8 - 8 = -6x + 12 - 8
y = -6x + 4 is slope intercept form
6 0
3 years ago
Read 2 more answers
HELPPP WILL MARK BRAINLYIST IF RIGHT
Bingel [31]

Answer:

550.92

Step-by-step explanation:

plz mark brainliest even if im wrong, i really need this, and if im wrong tell me im wrong so I cant correct it

7 0
3 years ago
Other questions:
  • Which statement could be used to explain why f(x) = 2x – 3 has an inverse relation that is a function?
    14·2 answers
  • Find the equation of the para bola that has zeros of x = -2 and x = 3 and a y-intercept of (0,-30)
    12·1 answer
  • The answer, I’ve been stuck on this and stressed out.
    8·1 answer
  • Ben also participated. He fell down midway, and had to walk part of the distance. Still, he finished the distance! It took him e
    15·1 answer
  • The bike store marks up the wholesale cost of all of the bikes they sell by 30%.
    6·2 answers
  • ZABD and ZDBC are supplementary angles.
    6·2 answers
  • Explain how you know...?
    11·1 answer
  • 4. The sum of two integers is -1. The product of the<br> integers is 72. Find the integers.
    6·2 answers
  • 7th grade mathematics <br> help plz as soon as possible <br> Image is attached <br> 10 POINTS
    6·1 answer
  • NEED HELP PLEASE!!!!!!!!!!!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!