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Alex_Xolod [135]
3 years ago
7

URGENT 25 PTS IF ANSWERED PLEASE HELP

Mathematics
1 answer:
dangina [55]3 years ago
6 0

Answer:

b. x= -6 or x=2

Step-by-step explanation:

|2x+ 4| = 8

The absolute value equation has 2 solutions, one positive and one negative

2x+4 = 8           2x+4 = -8

Subtract 4 from each side

2x+4-4 = 8-4      2x+4-4 = -8-4

2x = 4                  2x = -12

2x/2 =4/2              2x/2 = -12/2

x =2                      x = -6

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What goes on the green box?
AleksandrR [38]

Answer:

I think that it's 12 but I don't know for sure.

Step-by-step explanation:

8 0
3 years ago
If (sin(()−1))p =2cos(()−1)q , show that p​^2​​ =4q​^2 (1− q^2) ?.
Papessa [141]
Likely the equation is

\sin^{-1}p=2\cos^{-1}q

For either side to be defined, we require |p|\le1 and |q|\le1. Under these conditions, we can take

\sin(\sin^{1}p)=\sin(2\cos^{-1}q)
\implies p=2\sin(\cos^{-1}q)\cos(\cos^{-1}q)
\implies p=2q\sin(\cos^{-1}q)
\implies p=2q\sqrt{1-q^2}
\implies p^2=4q^2(1-q^2)

as required.
8 0
4 years ago
pd-100 has a half-life of 3.6 days. if one had 6.02 x 1023 atoms at the start, how many atoms would be present after 20.0 days?
Irina18 [472]
<span>half-life means you divide by 2 
21.6 / 3.6 = 6 hf (hf = half-life) 
then you divide by 2^6 
6.02 x 10^23 / 2^6 = 9.40625 x 10^21 atoms 
-------------- 
26 
3hf ===> 2^3 
10.0 / 2^3 = 1.25 gram (remaining) 
answer : 10 - 1.25 = 8.75g 
------- 
27 
128 / 2^n = 2 
64 = 2^n 
n = 6 
24 /6 = 4  
4 days is the half-live of the sample 
----------- 
28 
2.5/4.46 of 50% initial mass 
(2.5/4.46) x 0.5 x 2 = 0.5605 g 
answer: 2 - 0.5605 = 1.4395 g 
---------- 
29 
2^7 = 128 
so 7 half-lifes 
7* 8040 = 56200 days 
---------- 
30 
the time of 10 half-lifes 
= 10 x 0.334s = 3.34s </span><span>
</span>
3 0
4 years ago
A soccer team has 18 players. 5 of the players have scored at least 4 goals this season. Approximately what percent of the playe
liberstina [14]

Answer:30%

Step-by-step explanation:you divide 18 by 100 and then multiply that by 30 and it gives you 5.4 which is close to 5 players. So 30% is the answer

3 0
4 years ago
What is the center (the mean this time) for shop A?
kobusy [5.1K]

Answer:

6

Step-by-step explanation:

  1. add all the numbers together(7+6+2+8+3+9+5+4+6+10)= 60
  2. divide by the amount of numbers there are in the list. There are ten. 60÷10
  3. the mean is 6.
4 0
4 years ago
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