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3 years ago

If x= -2 find (1+x) + (1-x) and x-(x-1

Mathematics

2 answers:

Arte-miy333 [17]3 years ago

7 0

Answer:

$2 \: and \: 1$

Step-by-step explanation:

$(1 + x) + (1 - x) \\ = (1 + ( - 2)) + (1 - ( - 2)) \\ = ( - 1) + (3) \\ = 2 \\ \\ x - (x - 1) \\ = ( - 2) - (( - 2) - 1) \\ = - 2 + 2 + 1 \\ = 1$

$plzz \: mark \: as \: brainliest... \\ hope \: it \: helpss$

ycow [4]3 years ago

3 0

Answer:

i have made it in above pic hope it helps

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Which expression is equivalent to x^-5/3<br><br> Answer choices:

Alex17521 [72]

Answer:

1/3x5 the Answer is b

Step-by-step explanation:

6 0

3 years ago

Part A: Solve −np − 70 < 40 for n. Show your work. (4 points) Part B: Solve 4w − 7k = 28 for k. Show your work.

kondaur [170]

Hey!

For part A, let's write the problem,
$-np-70\ \textless \ 40$
Add $70$ to both sides...
$-np-70+70\ \textless \ 40+70$
$-np\ \textless \ 110$
We are going to reverse the inequality, to do this we are going to multiply both sides by $-1$ .
$\left(-np\right)\left(-1\right)\ \textgreater \ 110\left(-1\right)$
$pn\ \textgreater \ -110$
Divide both sides by $p$ .
$\frac{pn}{p}\ \textgreater \ \frac{-110}{p}$
Our answer would be,
$n\ \textgreater \ -\frac{110}{p}$

Let's go with Part B. Let's write the problem,
$4w-7k=28$
Subtract $4w$ from both sides,
$4w-7k-4w=28-4w$
$-7k=28-4w$
Divide both sides by $-7$ .
$\frac{-7k}{-7}=\frac{28}{-7}-\frac{4w}{-7}$
If we simplified it, we would be left with,
$k=-\frac{28-4w}{7}$

Thanks!
-TetraFish

4 0

3 years ago

A youth group and their leaders visited mammoth cave. 2 adults and 5 students in one van paid $77 for the grand avenue tour of t

11111nata11111 [884]

Answer:

Adult price for tour is $16 and Student price for tour is $9.

Step-by-step explanation:

Let the Cost of Adult be x.

Let the Cost of Student be y.

Now Given:

2 adults and 5 students in one van paid $77.

Hence the equation can be framed as;

$2x+5y=77 \ \ \ \ equation \ 1$

Also Given;

2 adults and 7 students in one van paid $95.

Hence the equation can be framed as;

$2x+7y=95 \ \ \ \ equation \ 2$

Now Subtracting equation 1 from equation 2 we get;

$(2x+7y)-(2x+5y)=95-77\\2x+7y-2x-5y=18\\2y=18\\\\y=\frac{18}{2} =\$9$

Now Substituting the value of x in equation 1 we get;

$2x+5y=77\\2x+5\times9=77\\2x+45=77\\2x=77-45\\2x=32\\\\x=\frac{32}{2}=\$16$

Hence Adult price for tour is $16 and Student price for tour is $9.

5 0

3 years ago

1/2x+4=20 solve for x.. Help?

hichkok12 [17]

Answer: 32

Step-by-step explanation: ok so here is what i do for those I grab a caculator (desmos online caculator i like to use but not required) then ill do (1/2×x)+4 but then once i write that i go back to the x delete the x and keep putting random numbers in higher and higher by one till the i get the answer (example: for this one i wrote that than i removed the x in it and did 1/2×5+4 then when that did not equal 20 i turned the 5 into a 6 then 6 was wrong so 7, then 8, then i just skipped to 20 then 20 was still wrong so skipped to 30, 30 was also wrong but CLOSE so then i tried 31 then 32 till the answer was 20 and when i did 32 it did say 20) hopes this helps

7 0

2 years ago

Read 2 more answers

Ben earns $750 a month plus 4% commission on all his sales over $900. Find the minimum sales that will allow Ben to earn at leas

e-lub [12.9K]

$750 + s x 4% = $2,500 | - $750

s x 4% = $1,750 | : 4%

s = $43.750

4 0

3 years ago