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Levart [38]
3 years ago
15

Help with some questions please Brainilest answer !/

Mathematics
2 answers:
jenyasd209 [6]3 years ago
8 0
8.5 × 10^12 6.) .001260 - 7003000 7.) 3.843 × 10^5 9.) X=1 10.) 7 ^x + 5 = 49 ^ x + 3 11.) 3 12.) A (or the first one) 13.) The third one 14.) I would guess the third one 15.) The first one 16.) The last one 17.) The second one 18.) The third one 19.) The last one 20.) The last one 21.) The last one
murzikaleks [220]3 years ago
4 0
Ok , lots of questions=lower standard of explanation
just answers


5. 8.5 times 10^12
6. 0.001260-7,003,000
7.3.843 times 10^4
9. x=1
10. 7^(x+5)=49^(x+3)
11. 1.03
12. 25,700(0.85)^x
13. 10a√a
14. 2 x^{2}  y^{4}  \sqrt[3]{5x^{2}}
15.6√3
16. \frac{2 \sqrt{3x} }{3x}
17. 4 \sqrt[3]{x^{2}}
18.64 x^{ \frac{10}{3} }  y^{ \frac{5}{2} }
19.√109
20. (8,(3/2))
21. 5 units
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A large mixing tank initially contains 1000 gallons of water in which 40 pounds of salt have been dissolved. Another brine solut
sergey [27]

Answer:

If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is is dA/dt =  15 - 0.005A

Option C) dA/dt =  15 - 0.005A is the correction Answer

Step-by-step explanation:

Given the data in the question;

If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is?

dA/dt = rate in - rate out

first we determine the rate in and rate out;

rate in = 3pound/gallon × 5gallons/min = 15 pound/min

rate out = A pounds/1000gallons × 5gallons/min  = 5Ag/1000pounds/min

= 0.005A pounds/min

so we substitute

dA/dt = rate in - rate out

dA/dt =  15 - 0.005A

Therefore, If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is is dA/dt =  15 - 0.005A

Option C) dA/dt =  15 - 0.005A is the correction Answer

8 0
3 years ago
Simplify <br> -2.5·4<br><br><br><br> thanks hhhhhhhhh
ICE Princess25 [194]

Answer:

-10

Step-by-step explanation:

-2.5 times 4

-10

4 0
4 years ago
Read 2 more answers
Write an equation in slope-intercept form for the line parallel to y= -7x-9 that passes through the point (4,9). Show your work.
MrRa [10]

Answer:  y=-7x + 37

Step-by-step explanation:

Parallel lines will have the same slope but different y-intercepts  so again we can  use the coordinates to determine the y intercept of the new equation.

So we know that the slope intercept formula is y=mx + b where m is the slope and b is the y-intercept so we will input the x and y coordinates to solve for b.

9 = -7(4) + b

9 = -28 + b

+28  +28

b = 37  

The equation will be y= -7x + 37

6 0
4 years ago
1. Which fraction is bigger than 2/3<br>A. 2/5<br>B. 4/7<br>C. 2/4<br>D. 3/4​
mylen [45]

Answer:

3/4

Step-by-step explanation:

When you convert all of them to decimals, 3/4 is the largest.

4 0
3 years ago
Read 2 more answers
Most living things need oxygen to survive you breathe in oxygen and it is carried to this Organ. here the red blood cells pick u
velikii [3]

Answer:

The lungs

Step-by-step explanation:

becuase biology

8 0
3 years ago
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