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4 years ago

Could some one help pls ill mark brainlist

Mathematics

2 answers:

Effectus [21]4 years ago

4 0

Add alike terms. Basically you add stuff together with the same variable! Since -8y and +3y have a y variable, they can be added together. Same with x.

-8y + 3y = -5y. This is because you’re adding 3 from a negative number.

5x - 9x = -4x. You’re subtracting 9 from a positive number.

That is as simple as it can get, so you put those two numbers in the same equation.

The simplest expression is:

-5y - 4x

svlad2 [7]4 years ago

4 0

Answer: −4x−5y

Step-by-step explanation:

−8y+5x+3y−9x

=−8y+5x+3y+−9x

Combine Like Terms:

=−8y+5x+3y+−9x

=(5x+−9x)+(−8y+3y)

=−4x+−5y

−4x−5y

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The sequence an= -(3)" - 1 is graphed below:

Pani-rosa [81]

Answer:

The given sequence is:

a(2)=1

a(3)=3

a(4)=9

We are to find the average rate of change between n=3 and n=4 for the given function.

Average rate of change =

So the average rate of change for the given function from n = 3 to n = 4 is 6

Step-by-step explanation:

8 0

3 years ago

When reading a book, Charlie made a list by writing down the page number of the last page he finished reading at the end of each

Assoli18 [71]

Answer:

No. of pages he read by the end of the 8th day = 425

Step-by-step explanation:

Charlie started from page 1 and read the same number of pages each day. Suppose x is the number of pages he read each day, the last page he read on the first day would be:

This would be the first number he noted on the list.

The second page number can be determined by adding the number of pages he read to the last page for day 1.

Last page for day 2 = 1 + x + x

= 1 + 2x

Similarly, the last page he read on the third day is:

Last page for day 3 = 1 + 3x. Similarly,

Last page for day 4 = 1 + 4x

Last page for day 5 = 1 + 5x

Last page for day 6 = 1 + 6x

Last page for day 7 = 1 + 7x

Last page for day 8 = 1 + 8x

His Mom added all of the page numbers and got a total of 432. So,

432 = 1+x + 1+2x + 1+3x + 1+4x + 1+5x + 1+6x + 1+7x + 1+8x

432 = 8 + 8x

8x = 432-8

8x = 424

x = 424/8

x = 53

By the end of the 8th day he actually read 1 + 8x pages. Substituting the value of x in this expression, we get:

No. of pages he read by the end of the 8th day = 1 + 8(53)

= 1 + 424

No. of pages he read by the end of the 8th day = 425

4 0

4 years ago

What is the solution set for the following system of equations 5x-3y-10=0 x+y-7=0

garik1379 [7]

(x, y) = ( $\frac{31}{8}$ , $\frac{25}{8}$ )

given the 2 equations

5x - 3y - 10 = 0 → (1)

x + y - 7 = 0 → (2)

rearrange (2) to obtain y in terms of x

y = 7 - x → (3)

Substitute y = 7 - x into (1)

5x - 3(7 - x) - 10 = 0

5x - 21 + 3x - 10 = 0

8x - 31 = 0 ( add 31 to both sides )

8x = 31 ( divide both sides by 8 )

x = $\frac{31}{8}$

Substitute this value into (3) for y

y = 7 - x = $\frac{56}{8}$ - $\frac{31}{8}$ = $\frac{25}{8}$

6 0

4 years ago

When writing a linear equation in standard form, what other forms might you need to use?

wlad13 [49]

Answer:

there are 2 other forms, point-slope form and slope-intercept form.

Step-by-step explanation:

standard is $Ax + By =C$

point-slope is $y-y_{1} =m(x-x_{1})$

slope-intercept is $y=mx+b$

5 0

3 years ago

Read 2 more answers

-6/11 + (-5/11) =? HELP ASAP ps the dash means that there a fraction

yuradex [85]

Answer:

-1

Step-by-step explanation:

Since the denominators are the same, then we add the numerators

-6+-5/11

-11/11

-1

8 0

4 years ago

Read 2 more answers