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3 years ago

Can someone simplify 25-4-9x+2x ?

Mathematics

2 answers:

Sloan [31]3 years ago

6 0

Answer:

21-7x

Step-by-step explanation: gather like terms

25-4=21 -9x+2x=-7x

kondor19780726 [428]3 years ago

6 0

Answer:

21-7x

Step-by-step explanation:

you have to basically combine like terms. so you would then have 25-4 and then -9x=2x, which is how i got 21-7x

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Given a rectangle with a perimeter of 24 inches, why dimensions maximize the area?

Pepsi [2]

Answer:

The dimensions are 6 by 6

Step-by-step explanation:

Calculus answer:

2x +2y= 24

xy= A

2x=24-2y

x=12-y

(12-y)(y)= 12y- y^2

the Derivative is = 12-2y

Then set that equal to zero 0=12-2y

-12=-2y

y=6

Confirm that 6 is a maximum by using a wiggle graph

wiggle graph -∞<---inc--6---dec-->∞

6 is a maximum

plug into original equation

2x + 2(6)=24

2x+12=24

2x=12

x=6

----------------------------------------------------------------------------------------------------

y=6

x=6

5 0

3 years ago

How do I solve for the solution??<br>y = 3x +2<br>y = x + 1

Elis [28]

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form:

(−1/2,1/2)

Equation Form:

x=−1/2,y=1/2

Step-by-step explanation:

7 0

3 years ago

Find the slope please

zavuch27 [327]

Hi student, let me help you out! :)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

We are asked to find the slope of this graph; we are provided with two points:

$\star~\mathrm{(6,0)}$

$\star~\mathrm{(0,-5)}$

$\triangle~\fbox{\bf{KEY:}}$

What we need in order to find the slope are two points and the slope formula.

Here's the formula:

$\star~\boxed{\mathrm{\cfrac{y2-y1}{x2-x1}}}$

Where

y2 and y1 are y-coordinates

x2 and x1 are x-coordinates

Substitute the values:

$\star~\mathrm{\cfrac{-5-0}{0-6}}}$

Simplify!

$\star~\mathrm{\cfrac{-5}{-6}}}$

Simplify more!

$\star~\mathrm{\cfrac{5}{6}}$

Hope it helps you out! :D

Ask in comments if any queries arise.

#StudyWithBrainly

~Just a smiley person helping fellow students :)

4 0

1 year ago

An electronic store orders 5 sets of walkie-talkies for $74.25 each. The store sells each set for $19.90. What is the percent ma

Ilya [14]

Answer:

34% per set

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Help me please. I’m dying of frustration

KiRa [710]

I've answered this before, but only partially. I'm not sure about the second part, but I think the first one is 10

4 0

2 years ago