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kenny6666 [7]
3 years ago
15

Solve the following system of equations using addiction

Mathematics
1 answer:
puteri [66]3 years ago
6 0

Answer:

3x+y=13

+2x-y=12

SOlve it like what you would normally do

3x+2x=5x

y+(-y)=0

13+12=25

Basically

5x+0=25

Bring down all appropiate signs

Now solve that

5x=25

x=5

Now to find “y”

Plug in The “x”

3*5=15

15+y=13 now solve that and you’d get -2

If you plug it into the other one, it would be the same thing

2*5=10

10-y=12

-y=2

y= -2

x=5

y= -2

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If its 11:45 in 2 1/2 hours what will it be
Gnom [1K]

Answer:

Step-by-step explanation:

11:45 + 1 hour = 12:45

12:45 + 1 hour = 1:45

1:45 + 30 minutes = 2:15

5 0
4 years ago
Is 20:14 and 80:56 equivalent
slamgirl [31]
Yes it is, good luck bro bro
5 0
3 years ago
The set of life spans of an appliance is normally distributed with a mean Mu = 48 months and a standard deviation Sigma = 8 mont
natita [175]

To solve the problem we must know about Z-Score.

<h3>What is Z-score?</h3>

A Z-score helps us to understand how far is the data from the mean. It is a measure of how many times the data is above or below the mean. It is given by the formula,

Z = \dfrac{X- \mu}{\sigma}

Where Z is the Z-score,

X is the data point,

μ is the mean and σ is the standard variable.

The life span of an appliance that has a z-score of –3 is 24 months.

Given to us

  • Mean, μ = 48 months,
  • standard deviation, σ = 8 months,
  • Z-Score = -3

<h3> What is the life span of an appliance?</h3>

The life span of the appliance can be calculated using the Z-score formula,

Z = \dfrac{X- \mu}{\sigma}

Substitute the values,

-3 = \dfrac{X- 48}{8}\\\\-3 \times 8 = X - 48\\\\-24+48=X\\\\X = 24\ months

Hence, the life span of an appliance that has a z-score of –3 is 24 months.

Learn more about Z-score:

brainly.com/question/13299273

6 0
3 years ago
-7/10 - 4/10 i dont understand
Vanyuwa [196]

Note that they have the same denominator. Simplify.

-7 - 4 = -11

-11/10 is your improper fraction.

To simplify, make it into a mixed fraction

-11/10 = -10/10 - 1/10

-10/10 = -1

-1 1/10 is your answer

hope this helps

6 0
4 years ago
1) Compare the function with the parent function. without graphing, what are the vertex, axis of symmetry and transformations of
Mama L [17]
I guess the parent function to be: y = |8x|.

To translate a function m units to the right, you must substitute x by x-m. You had y = |8x|. You substitute x by x-1/4, to get:

y = |8(x-1/4)| = |8x-2|

So, the function was translated to the  right 1/4 unit.

To translate a function vertically n units, you add (translate up) or subtract (translate down) m to the function. You had y = |8x-2|. You subtract 7 to get:

y = |8x-2|-7

Hence, the parent function was translated 7 units down.

The vertex is the point where the content of the absolute value changes its sign, that is, the where it equals zero:

8x-2 = 0 <=> x=1/4

The x coordinate of the vertex is therefore x=1/4. To calculate the y coordinate of the vertex, you must substitute the x coordinate in the equation of the function, to get:

x=1/4 => y = |8(1/4)-2| - 7 = -7

The vertex is, therefore, (1/4,-7).

Finally, the axis of symmetry is a vertical line through the vertex: x=1/4 (the equation of a vertical line is of the form x=a).

The correct answer is D).
6 0
3 years ago
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