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3 years ago

I am thinking of

Mathematics

1 answer:

user100 [1]3 years ago

3 0

Answer:

9 and 6

Step-by-step explanation:

Write down the system.

The two numbers are x and y.

We are therefore given:

x+y=15

x-y=3

I will solve this for elimination since it is already setup for it.

I will add the columns since both equations are in the same form.

2x+0y=18

2x =18

Divide both sides by 2:

x =18/2

Simplify:

x =9

So if x+y=15 and x=9, then y=6.

The two numbers are 9 and 6.

Test:

9+6=15

9-6=3

You might be interested in

The surface area of the figure below is 50.80m^2 True or False

solong [7]

For this case we have that by definition, the surface area of a cone is given by:

$SA = \pi * r * s + \pi * r ^ 2$

Where:

A: It's the radio

s: It's the slant

Substituting according to the data we have:

$SA = \pi * 2.1 * 5.6 + \pi * (2.1) ^ 2\\SA = 36.9264 + 13.8474\\SA = 50.7738 \ m ^ 2$

If we round:

$SA = 50.8 \ m ^ 2$

Answer:

True

8 0

3 years ago

Can someone help me with this

Whitepunk [10]

Answer:

8/3 or 2 2/3 as a mixed number

Step-by-step explanation:

6 0

2 years ago

You would like to start a club for psychology majors on campus, and you are interested to find out what proportion of psychology

Natalija [7]

From the sample used to find out what psychology majors would join the club and if it is biased, we can say that;

- Yes, the sampling method is biased.

- The likely direction of the bias is because you only asked 5 people which

is not a significant percentage of those offering psychology majors and as

such the 4 out of 5 gotten is likely going to be an over estimation of those

who are willing to pay to join this club.

We are told that;

You want to start a club.

This club is for psychology majors.

You want to find the proportion of those in the psychology majors that will join this club you want to organize.

Now, out of all the students offering psychology majors, you only asked 5 of them if they will be interested. Since 4 out of the 5 are interested and you want to use that to form a basis of the proportion of those interested , it would lead to sampling bias since the population is not adequately represented.

Therefore, this would lead to sampling bias and thus the sample is biased.

Read more at; brainly.com/question/12637861

8 0

2 years ago

Solve 10 X + 8 / 2 X + 7 is equal to 4

ale4655 [162]

Answer:

x = 10

Step-by-step explanation:

$\frac{10x + 8}{2x + 7} = 4$

or, 10x + 8 = 4(2x + 7)

or, 10x + 8 = 8x + 28

or, 10x - 8x = 28 -8

or, 2x = 20

or, x = 20/2

or, x = 10

x = 10

4 0

2 years ago

Find (−18)+(−25)+13 . −56 −30 20 −6

timama [110]

Answer:

Step-by-step explanation:

-18 + (-25) + 13 =

-18 - 25 + 13 =

-43 + 13 =

-30 <====

7 0

3 years ago