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professor190 [17]
3 years ago
6

What is the value of the expression

Mathematics
1 answer:
Nookie1986 [14]3 years ago
5 0

Answer:

D 3.5

Step-by-step explanation:

Replace values in the equation with values given. Calculate.

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Help please and thank you.
devlian [24]

Answer:

1.66667

Step-by-step explanation:

4 x ? = 12    ? = <u>3</u>

so,

z x ? = 5  

5/<u>3</u> = 1.6666667

5 0
3 years ago
1% of what number is 7,
diamong [38]
A. 1/100 * x = 7
x = 7 * 100/1
x = 700

b. 50/100 * x = 33
x = 33 * 100/50
x = 66

c. 3/100 * 100 = 3

d. x/100 * 200 = 6
2x = 6
x = 3

e. 15/100 * 40 = 6
5 0
3 years ago
Item5 Time Remaining 56 minutes 30 seconds00:56:30 Item 5Item 5 Time Remaining 56 minutes 30 seconds00:56:30 A pure sample of tr
trapecia [35]

Answer:

option A

Step-by-step explanation:

given,

sample of tritium, ³H

t_{1/2} = 12.32 years

contents present of ³H = 5.25 mol

content of ³He = 6.35 mol

reaction

 ^3H\rightarrow \ ^3He

A₀ is the initial concentration

At is the concentration after time t

A₀ = 5.25 + 6.35 = 11.6 mol

At = 5.25

now,

  k = \dfrac{0.693}{t_{1/2}}

  k = \dfrac{0.693}{12.32}

           k = 0.0563 /year

ln(\dfrac{A_o}{A_t}) = k t

t = \dfrac{1}{k} ln(\dfrac{A_o}{A_t})

t = \dfrac{1}{0.0563} ln(\dfrac{11.6}{5.25})

t = 14.1 yr

hence, the correct answer is option A

7 0
3 years ago
Patrycia’s overall grade in her physics class is based solely on the average of her scores on 6 unit tests. The grade she receiv
Sedbober [7]
(89 + 93 + 95 + 92 + 90 + x)/6 = 90%
(459 + x)/6 = 90% (multiply by 6)
459 + x = 540
x = 540 - 459
x = 81

check...
(459 + 81)/6 = 90%
540/6 = 90%
90% = 90% (correct)

She would need to have an 81
8 0
4 years ago
Read 2 more answers
Plz help find the area asap i really need help with the math problems
lozanna [386]

Answer:

uh the area is 45 for the first one because 15*9 is 135 and 15*6 is 90 because you get 6 from 15-9 to get the length for the triangle. Then 135-90 is 45.

Step-by-step explanation:

The area for the second shape is 114 because you will take 14 multiplied by 12 and you get 168, then you will take 6*9 which is 54 and subtract that from 168, and you should get 114.

The area for the third shape is i dont even know because it doesnt give numbers unless your trying to find it with the letters but at least you got the first two

5 0
3 years ago
Read 2 more answers
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