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liubo4ka [24]
3 years ago
14

Write an equivalent expression by distributing the "-−" sign outside the parentheses: -(7n+0.9)

Mathematics
2 answers:
Savatey [412]3 years ago
6 0
(-7n-0.9)
-7n-0.9=0
-7n=0.9
-n=7.78
n=7.78
irinina [24]3 years ago
3 0

Answer:

-7n - .9

Step-by-step explanation:

By distributing the - to the parentheses, you must add a - sign to each number in the parentheses. This makes the positives turn negative.

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Zoe shows her work in finding the solution to 9 – 7x = 7 – 4(2x 3). which choice describes the error in her solution?
FinnZ [79.3K]
I'll assume the above equation is: 9 - 7x = 7 - 4(2x+3)

* do distributive multiplication
9 - 7x = 7 - 8x - 12

*move like terms
-7x + 8x = 7 - 12 - 9

* solve for x
x = 7 - 21
x = -14

To check, substitute x by its value -14

9 - 7x = 7 - 4(2x+3)
9 - 7(-14) = 7 -4[2(-14) + 3]
9 + 98 = 7 - 4(-28 +3)
107  = 7 - 4(-25)
107 = 7 + 100
107 = 107
5 0
3 years ago
ANSWER FAST GET 100 POINTS AND BRAINLIEST
klio [65]

The student with the most accurate description of the graph that represents Kate's movement is Tim

<h3>The student with the accurate description</h3>

From the graph that represents Kate's distance per minute, we have the following highlights:

  • Kate drives at an irregular speed for 2 minutes
  • Then she drives at a regular speed for 4 minutes
  • Then she stopped moving for the next 2 minutes

The student's description that matches the above highlights is Tim

Hence, the student with the most accurate description is Tim

Read more about distance-time graph at:

brainly.com/question/13877898

#SPJ1

3 0
2 years ago
Read 2 more answers
Solve for f, what is f
Nutka1998 [239]

Answer:

f = 1

Step-by-step explanation:

-f + 2 + 4f = 8 - 3f

-f + 4f + 3f = 8 - 2

6f = 6

f = 6/6

f = 1

Hope it helps!!

6 0
3 years ago
Read 2 more answers
Combine the like terms -5.4v plus 0.3v
VladimirAG [237]

-5.4v+0.3v= -5.1v

Because both numbers have a common variable of 'v,' they can be combined.

6 0
3 years ago
2. Solve the<br> triangle.<br> a = 12, b = 22, C = 95°
djyliett [7]

this is the answer to this question - Two weather tracking stations are on the equator 146 miles apart. A weather balloon is located on a bearing of N 35°E from the western station and on a bearing of N 23°E from the eastern station. How far is the balloon from the western station?

Answer:

Reasons:

The given parameters are;

Distance between the two stations = 146 miles

Location of the weather balloon from the Western station = N35°E

Location of the weather balloon from the Eastern station = N23°E

The location of the station = On the equator

Required:

The distance of the balloon from the Western station

Solution:

- The angle formed between the horizontal, and the line from the Western station

to the balloon = 90° - 35° = 55°

- The angle formed between the horizontal, and the line from the Eastern station

to the balloon = 90° + 23° = 113°

The angle at the vertex of the triangle formed by the balloon and the two stations is 180° - (55 + 113)° = 12°

By sine rule,

Distance from balloon to western station = 146/sin(12 dg) = Distance from balloon to western station/sin(113 dg)

Therefore;

Distance from balloon to western station = 146/sin(12 dg) x sin(113 dg) ~ 646.4

Step-by-step explanation:

7 0
2 years ago
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