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Talja [164]
3 years ago
10

Brainest gets 100 do problem 1-12 show your work

Mathematics
1 answer:
In-s [12.5K]3 years ago
6 0
1. Closed
2. IDK
3. No, because the first inequality says x is lesser than 5 but the second one          says x is greater. X can't be both greater and lesser at the same time.
4. X>12       
5. X\leq -4
6. y<-8
7. 2.3 + w>18
8. -4t\leq -2/5
9. b - 4.2 < -7.5
10. 2x \leq  -24
11. 4 + 8 \leq 12 - Correct
12. 5(-5) > -15 = -25 > -15 = Incorrect
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PLEASE HELP 20 POINTS
Anika [276]
Hello!

A sample of Bromine-82 begins at 80 mL. We are given that this value will decrease by half of its current amount every 35 hours. First, we'll determine the number of times that 35 goes into 140. This will reveal the number of times we should divide the sample by 2:

140 ÷ 35 = 4

We have now proven that there are 4 periods of 35 hours in 140 hours. This means that we will divide the sample in half a total of 4 times, as follows:

1. 80 ÷ 2 = 40
2. 40 ÷ 2 = 20
3. 20 ÷ 2 = 10
4. 10 ÷ 2 = 5

We have now proven that an 80 mL sample of Bromine-82 will be reduced to only 5 mL after 140 hours. Therefore, the correct answer is 5 mL.

I hope this helps!
7 0
3 years ago
Read 2 more answers
The answer of this  3*(-7) is  -21
irinina [24]
Yes, you are correct. The answer of 3*(-7) = -21
6 0
3 years ago
Use synthetic division to divide x^3+5x^2−9x−7 by x−2 1 5 -9 -7 The quotient is: _____ The remainder is: ______
RoseWind [281]

Answer:

 The quotient is x² + 6x +3

       Remainder  = -1      

 Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given Polynomial equation

   f(x) = x³+5x²−9x−7

By using synthetic division

 

 <em> x = 2  </em>         1       5       -9      -7

   <u>                   0       1       12     6</u>

  <u>                 1      6         3     </u><em><u> -1   </u></em><u>         </u>

 The quotient is x² + 6x +3

       Remainder  = -1      

5 0
3 years ago
1000p for an answer pleaseeeeee
zepelin [54]
X=17.3
but the 3 has a line above. which means repeated 
4 0
3 years ago
Read 2 more answers
Which table of ordered pairs represents a proportional relationship?
dedylja [7]

Answer:

A 2-column table with 3 rows. Column 1 is labeled x with entries 14, 28, 42. Column 2 is labeled y with entries 2, 4, 6.

Step-by-step explanation:

Examining the response options:

A 2- compartment chart with 3 rows. Column 1 is designated x with records 1, 5, 6. compartment 2 is designated y with records 5, 20, 30.

No, as y = 25 not 20 and x = 5 .

A 2- compartment chart with 3 rows. Column 1 is identified x with approaches 48, 32, 16. compartment 2 is designated y with listings 4, 2, 1.

No, y =64 not 48 and x= 4.

A 2- compartment chart with 3 lines. compartment 1 is designated x with records 0, 1, 3. compartment 2 is designated y with records 90, 70, 25.

No, y= 25+3*45= 160 not 90 and x = 3.

A 2- compartment chart with 3 lines. compartment 1 is designated x with records 42, 28, 14. compartment 2 is designated y with records 2, 4, 6.

Yes, as 2*7 = 14, 4*7= 28, 6*7= 42.

5 0
3 years ago
Read 2 more answers
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