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maksim [4K]
3 years ago
13

Is this correct? if not please let me know how to solve it

Mathematics
2 answers:
Mrac [35]3 years ago
7 0
It is correct. you had to use the distributive property and you did that correctly.
Darina [25.2K]3 years ago
6 0
It's correct.

All you had to do was distribute and you did that perfectly.
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a sample from a mummified bull was taken from a certain place. The sample shows that 71% of the carbon-14 still remains. how old
7nadin3 [17]

Answer:

Step-by-step explanation:

Decay of carbon - 14 is exponential in nature . It decays as follows .

N=N_0e^{-\lambda t}  λ is called decay constant .

λ = .693 / T where T is half life .

Half life of carbon-14 is 5700 years

λ = .693 / T

= .693 / 5700

= 12.158 x 10⁻⁵ year⁻¹

N=N_0e^{-\lambda t}

N = .71 N₀

.71 N_0 =N_0e^{-\lambda t}

.71  =e^{-\lambda t}

Taking ln on both sides

ln .71 = - λ t

ln .71 = - 12.158 x 10⁻⁵  t

-0.3425 =  - 12.158 x 10⁻⁵  t

t = .3425 / 12.158 x 10⁻⁵

2817  years .

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3 years ago
Jazmeen can walk 1/4 mile every 1/5 hour. At this rate, how far can jazmeen walk in one hour
SVETLANKA909090 [29]
Since there are 60 minutes in an hour, 1/5 of an hour is 60/5=12. U can then multuply 12 and 1/4 which is 3 miles per hour.
7 0
3 years ago
What is the equation of the line that is parallel to the
amm1812

Answer:

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Step-by-step explanation:

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Sidana [21]

Answer:

a)  (x/2 +3)^2

b)  (5a -3b)^2

c)  (x/3 +y/5)^2

d)  (10b -3c)^2

e)  (a/4 -2b)^2

Step-by-step explanation:

Assuming you can do that, write the terms of the quadratic in lexicographical order. (The square terms will be first and last.) Then the binomial is the "sum" of the square roots of the first and last terms with the sign of the middle term.

Using (e) as an example, the term are already in order. (In (d), they need to be rearranged.) The first term is 1/16a^2, and its square root is 1/4a = a/4. The last term is 4b^2 and its square root is 2b. The sign of the middle term is negative, so these two roots will be separated by a minus sign:

  (a/4 - 2b)^2

The expression you want is the square of the binomial.

_____

As a check, you can make sure that double the product of these terms is the middle term of the trinomial you started with.

In this example, that double product is 2·a/4·(-2b) = -ab, which exactly matches the middle term you started with.

3 0
3 years ago
a positive number of two digits the ten place exced.the unit place digit by 5 .if the producted digit is 46. find the number​
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I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

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