All categories

3 years ago

X + y =7x - y= 1find X and Y

Mathematics

2 answers:

Lena [83]3 years ago

7 0

X=4 Y=3 djdndndjdnsnsndbdbdbdd

lozanna [386]3 years ago

7 0

Answer:

x=4 and y=3

Step-by-step explanation:

You might be interested in

When using ANOVA, the sum of squares within is: Group of answer choices Showing the difference between the groups Effect varianc

prohojiy [21]

Answer:

When using ANOVA, the sum of squares within is: Showing the difference between the Total SS and Between SS known as Error variance

Step-by-step explanation:

Within SS is also known as Error sum of squares . It is calculated by finding the difference between Total Sum of Squares and Between Sum of Squares

with the given degrees of freedom.

Within SS = Total SS - Between SS

Where

Total SS= ∑∑X²- C. F

Between SS= ∑T²j/r - C.F

Correction Factor = CF = Tj²/n

So the correct answer would be

Showing the difference between the Total SS and Between SS also known as Error variance.

8 0

3 years ago

4 in.

sleet_krkn [62]

Answer:

305.12 square inches

Step-by-step explanation:

The picture of the question in the attached figure

we know that

The area of the window is equal to the area of a rectangle, plus the area of two quarter circles plus the area of the smaller square between the two upper corners

Find the area of rectangle

$A=(12)(26-4)=264\ in^2$

Find the area of the two quarter circle

$A=2[\frac{1}{4}(3.14)(4^2)]$

$A=25.12\ in^2$

Find the area of the smaller square between the two upper corners

$A=(12-8)(4)=4^2=16\ in^2$

The total area is equal to

$A=264+25.12+16=305.12\ in^2$

4 0

4 years ago

Fine the promise factorization of 245. Is there another way to write the prime factorization of 245?

Rufina [12.5K]

Answer:

5*7^2 is the other way to write the question

Step-by-step explanation:

245: 7 * 7 * 5

You could write it as 7^2 * 5

Method:

You know that 5 divides into 245

245: 5 * 49 49 factors into 7 * 7

So the result is 5 * 7 * 7

6 0

3 years ago

the number of boys and girls in a school are 480 and 576 respectively express the ratio of the number of boys to that of girls

Leni [432]

Answer:

480 to 576

Step-by-step explanation:

3 0

4 years ago

Read 2 more answers

Select TWO possible values for x in the equation x2=45.

kirill [66]

Answer:

$3 \sqrt 5}$ and $-3 \sqrt 5}$

Step-by-step explanation:

Given

$x^2 = 45$

Required

Determine the values of x

$x^2 = 45$

Take square root of both sides

$\sqrt{x^2} = \±\sqrt{45}$

$x = \±\sqrt{45}$

Expand 45 as 9 * 5

$x = \±\sqrt{9 * 5}$

Split the square root

$x = \±(\sqrt{9} *\sqrt 5}$

$x = \±3 *\sqrt 5}$

$x = \±3 \sqrt 5}$

This can be further split to:

$x = 3 \sqrt 5}$ or $x = -3 \sqrt 5}$

Hence, the possible values of x are

$3 \sqrt 5}$ and $-3 \sqrt 5}$

5 0

3 years ago

X + y =7x - y= 1find X and Y​

X + y =7x - y= 1find X and Y