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irina [24]
4 years ago
15

Needs help with linear equations got 10 questions in all the picture posted is the first one.

Mathematics
1 answer:
madreJ [45]4 years ago
5 0
Your equation would be T=.002n.
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Match the following items by evaluating the expression for x = -7. x-2 x-1 x0 x1 x2
frosja888 [35]

Answer:

{x}^{ - 2}  =  \frac{1}{ {x}^{2} }  \:  \: –> {7}^{ - 2}  =  \frac{1}{ {7}^{2} }  =  \frac{ 1}{49}  \\  \\  {x}^{ - 1}  =  \frac{1}{ {x}^{1} }   \: –>  {7}^{ - 1}  =  \frac{1}{ {7}^{1} } =  \frac{1}{7}  \\  \\  {x}^{0} –> {7}^{0}   = 1 \\  \\  {x}^{1}  –> {7}^{1}  = 7 \\  \\  {x}^{2}  –> {7}^{2}  = 49

7 0
2 years ago
The half-life of a certain radioactive material is 36 days. An initial amount of the material has a mass of 487kg. Write an expo
Lubov Fominskaja [6]

Answer:

442.302 kg

Step-by-step explanation:

amount = 487 (1/2)^(t/36) where t is the number of days.

if t = 5

amount = 487(.5)^(5/36)

= 442.302 kg

4 0
2 years ago
The difference of twice a number and 4 is 16 .
german

Answer:

Let X be the number.

Twice the number would be 2x

The difference between the two, would be subtraction, so you would subtract 4 from 2x


The equation becomes 2x-4 = 16


Now solve for x:

2x-4 = 16

Add 4 to each side:

2x = 20

Divide both sides by 2:

x = 20/2

x = 10


The number is 10.


7 0
3 years ago
Read 2 more answers
What's the midpoint between (1,-7) and (-1,-23)
Alik [6]
Answer: (0,-15)

--------------------------------------------------

Explanation:

Add up the x coordinates to get 1+(-1) = 0. Divide this sum in half to get 0/2 = 0. Therefore the x coordinate of the midpoint is 0.

Repeat for the y coordinates. First add the y coordinates to get -7+(-23) = -30. Then divide that result in half to get -30/2 = -15. So the y coordinate of the midpoint is -15.

Overall, the midpoint is (0,-15).

8 0
3 years ago
The Riches are ordering topsoil for their new lawn. The topsoil will be spread evenly over the yard before the grass is planted.
Simora [160]

Answer:

I think its 55.5

Step-by-step explanation

Sorry if I got it wrong for you

5 0
3 years ago
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