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LiRa [457]
3 years ago
15

Write an equation to represent the

Mathematics
2 answers:
eimsori [14]3 years ago
8 0

Answer:

x-11=-18

x=-7

Check work:

-7 -11 = -18

When both numbers are negative, you add them.

-7 "plus" -11 equals -18.

myrzilka [38]3 years ago
6 0

<u>Answer: </u>

The equation to represent the  relationship "a number decreased by  11 is equal to -18 is  x - 11 = -18. The value of x is -7

<u>Solution: </u>

From the question:

Given:

A number decreased by 11 is equal to -18.

That would be written as:

To Find the Number:

Assume the variable be X in its place

x - 11 = -18---------- (1)

Whenever it says "decreased by" a number, you know you are subtracting that number

Therefore from equation (1)

Now, to solve x - 11 = -18  

x - 11 = -18  

x=-18 + 11

x = -7

Hence the value of x is -7  Hence the equation to represent the relationship is x - 11 = -18

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Find the solution of y = –x – 3 for x = 1.
nikklg [1K]

Answer:

A.  :)

Step-by-step explanation:

5 0
3 years ago
Isolate the variable x. - 5x &lt; 10
Neporo4naja [7]

Answer:

x > - 2

x ∈ ( - 2 ; + oo)

Step-by-step explanation:

- 5x < 10 | *(-)

5x > - 10 | : 2

x > - 2

x ∈ ( - 2 ; + oo)

8 0
3 years ago
8 Leandra's fastest time for the 400 m is 70 seconds. In his next race he improves by
disa [49]

8) a) The new fastest time is 56.7 seconds, b) The <em>overall percentage</em> improvement is 19 %.

9) The height after the first increase is 1.375 meters and after the second increase is 1.54 meters.

<h3>How to apply percentages in real life applications</h3>

In this problem we have two examples from real life, in which percentages are used. The first is the distance traveled by a runner in a given time and the second is the growth of a person in time. Change in variables based on percentages are described by the following formula:

C' = C · (1 + r / 100)     (1)

Where:

  • C - Initial value
  • C' - Final value
  • r - Percentage of change.

Now we proceed to resolve on each case. 8) a) Please notice that the runner must cover the trail in less time and percentage time must be negative. If we know that C = 70 and r = - 10, then his new fastest time is:

C' = 70 · (1 - 10 / 100)

C' = 70 · 0.90

C' = 63

And again: (C' = 63, r = - 10)

C'' = 63 · (1 - 10 / 100)

C'' = 63 · 0.90

C'' = 56.7

The new fastest time is 56.7 seconds.

b) And the overall percentage improvement is:

r = (|C'' - C| / C) × 100 %

r = (|56.7 - 70| / 70) × 100 %

r = 19 %

The <em>overall percentage</em> improvement is 19 %.

9) If we know that C = 1.25 and r = 10, then the height next year is:

C' = 1.25 · (1 + 10 / 100)

C' = 1.375

And again: (C' = 1.375, r = 12)

C'' = 1.375 · (1 + 12 / 100)

C'' = 1.54

The height after the first increase is 1.375 meters and after the second increase is 1.54 meters.

To learn more on percentages: brainly.com/question/13450942

#SPJ1

3 0
2 years ago
Grade 10 math anyone?
Kisachek [45]

Answer:

6 years

Step-by-step explanation:

Here,

I=60

P=200

R=0.05

and we need to find T.

So using the formula I=PRT, we can find T by substituting the values

60 = (200)(0.05)T

60=10T

T=\frac{60}{10} = 6 years

8 0
3 years ago
Kim sold a house for $250,000 and made a 2% commission. How much money did Kim make from commission for selling the house?
Vikki [24]

Answer:

5000

Step-by-step explanation:

2% of 250,000 is 5000

4 0
3 years ago
Read 2 more answers
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