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3 years ago

HELP MARKING BRAINLIEST

Mathematics

1 answer:

MAVERICK [17]3 years ago

8 0

Answer:

Give me brainliest

Step-by-step explanation:

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What is the value of x in the equation? 5 5/6 x + 2 2/3 = 12

devlian [24]

Answer:

The value of x is 8/5

Step-by-step explanation:

(35/6)x + (8/3) = 12

(35/6)x = 28/3 (cross multiplication)

105x = 168

x = 8/5

5 0

3 years ago

A sample of tritium-3 decayed to 94.5% of its original amount after a year.

Zolol [24]

(a) If $y(t)$ is the mass after $t$ days and $y(0) = A$ then $y(t) = Ae^{kt}.$

$y(1) = Ae^k = 0.945A \implies e^k = 0.945 \implies k = \ln 0.945$

$\text{Then } Ae^{(\ln 0.945)t} = \frac{1}{2}A\ \Leftrightarrow\ \ln e^{(\ln 0.945)t} = \ln \frac{1}{2}\ \Leftrightarrow\ ( \ln 0.945) t = \ln \frac{1}{2} \Leftrightarrow \\ \\
t = - \frac{\ln 5}{\ln 0.945} \approx 12.25 \text{ years}$

(b)
$Ae^{(\ln 0.945) t} = 0.20 A \ \Leftrightarrow\ (\ln 0.945) t \ln \frac{1}{5}\ \implies \\ \\
t = - \frac{\ln 5}{\ln 0.945} \approx 28.45\text{ years}$

3 0

4 years ago

A=1/2bh , solve for b

anygoal [31]

B= the base of the object

6 0

3 years ago

Read 2 more answers

A car costs 20% less this year than last year. Last year, the car cost 5% less than the year before. The price of the car this y

Tems11 [23]

Answer:

The answer is 11,374

Step-by-step explanation:

First we find 5% of 9,400 is.

9,400 * 5% = 470

Next we add 9,400 with 470 then multiply by 20%

9,400 + 470 = 9,870

9,870 * 20% = 1974

Next we add.

9,870 + 1,974 = 11,374

So, the answer is 11,374

Hope this helps! :)

3 0

3 years ago

The librarian purchased 22 copies of a best-selling book for $385.66.

kow [346]

Answer:

$17.53

Step-by-step explanation:

$385.66 divided by 22 equals the how much each book cost

5 0

3 years ago