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3 years ago

HELP HELP HELP HELP HELP

Mathematics

2 answers:

Alexandra [31]3 years ago

8 0

All real number except 1.

For x=1 denominator = 0 & the function is not defined

irina1246 [14]3 years ago

6 0

All real numbers except 1 since you cant have 0 on the bottom

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3n - 5p + 2n = 10p, solve for n

Alex17521 [72]

Combine (subtract) 3n and 2n to get 1n or n. Then you have n -5n =10n add 5n to 10n to get 15n. divide the 15 from n and your answer is n=15

4 0

2 years ago

What is thr answer of (a-b) (a+2b)

kari74 [83]

Answer:

Step-by-step explanation:

Use FOIL method

F -> First

O Outside

I inside

L Last

(a - b)(a + 2b)= a*a + a *2b + (-b)*a + (-b)*2b

= a² + 2ab - ab - 2b²

Combine like terms

= a² + ab - 2b²

3 0

2 years ago

HELP ASAP PLEASE!!!

grigory [225]

The quadratic fomula:

$ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\If\ \Delta0,\ then\ \boxed{TWO\ SOLUTIONS:\ x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}}-----------------------------------------------$

We have the equation:

$2x^2-7x-21=0\\\\a=2,\ b=-7,\ c=-21\\\\\Delta=(-7)^2-4(2)(-21)=49+168=217 > 0\\\\x_1=\dfrac{-(-7)-\sqrt{217}}{2(2)}=\dfrac{7-\sqrt{217}}{4}\approx-1.93\\\\x_2=\dfrac{-(-7)+\sqrt{217}}{(2)(2)}=\dfrac{7+\sqrt{217}}{4}\approx5.43\\\\Answer:\ \boxed{\boxed{2.\ -1.93\ and\ 5.43}}$

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2 years ago

Simplify the expression: 5(1 + 3g)

KonstantinChe [14]

5(1+3g)
5(1) + 5 (3g)
5 + 15g

6 0

3 years ago

Read 2 more answers

Y = -1/2x + 2 x + 2y = 4

STatiana [176]

Answer:

infinite solutions 0=0

Step-by-step explanation:

solve for x. x=4-2y

input for x from 1st equation

y=-1/2(4-2y) +2

y= -2+y+2

y-y =-2+2

0=0

4 0

2 years ago