3 years ago

I need to solve x-y=2 and x+y=-6

Mathematics

2 answers:

Ede4ka [16]3 years ago

6 0

4-2=2
4+2=6
X = 4
Y = 2

Fynjy0 [20]3 years ago

5 0

Answer:

There isn't an answer for it because there is a variable

You might be interested in

In AABC, side AB is 8 units long and side BC is 25 units

Drupady [299]

Answer: the answer is D

Step-by-step explanation:

6 0

4 years ago

g True or False: A sample of size 25 provides a sample variance of 400. The standard error in this case, equal to 4, is best des

Tpy6a [65]

Answer:

True.

Step-by-step explanation:

If we have for a sample of size n=25 a sample variance of 400, the standard error can be written as:

$\sigma_s=\dfrac{\sigma}{\sqrt{n}}=\dfrac{\sqrt{400}}{\sqrt{25}}=\dfrac{20}{5}=4$

This way of calculating the standard error is the same used for estimating the standard deviation of the sample means for samples of size n=25.

3 0

4 years ago

A stock has a return of -$1.26 per day. Write and solve an equation to find the number n of days until the total return is -$10.

Sedbober [7]

Answer:

Its below

Step-by-step explanation:

The equation is 10.08 / 1.26

n = 8 days

8 0

3 years ago

What is x when tan24 = 5/x

kirill115 [55]

Answer:

x ≈ 11.23

Step-by-step explanation:

Given

tan24° = $\frac{5}{x}$ ( multiply both sides by x )

x × tan24° = 5 ( divide both sides by tan24° )

x = $\frac{5}{tan24}$ ≈ 11.23 ( to 2 dec. places )

6 0

3 years ago

How is an equation like an expression? How is it different?

morpeh [17]

Answer:

See explanation.

Step-by-step explanation:

An expression is a set of terms that are combined using addition, subtraction, multiplication, or division. The following are examples of expressions:

$2x-1$

$5y+8$

$2$

Note: expressions do not equal anything.

In contrast, equations are expressions that equal at least one term. The following are examples of equations:

$2y-4=26$

$4x-4=0$

$x=10$

$y=x+2$

Note: equations do equal a term, as shown in the examples.

3 0

3 years ago