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3 years ago

What are the values for matrix a?

Mathematics

2 answers:

Ilya [14]3 years ago

7 0

Answer:

The answer is C

Step-by-step explanation:

lana [24]3 years ago

3 0

Answer:

C mark me brainest

Step-by-step explanation: EDGE2021 JUST DID IT

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Nadia is selling tickets for a school event. She has already sold 17 tickets. Her goal is to sell at least 100 tickets. Each day

zheka24 [161]

It is given Nadia goal is to sell 100 tickets out of which she has already sold 17 tickets .

Total number of tickets = 100

Number of tickets sold =17

Number of tickets left = 100-17=83

Nadia can sell 10 tickets in a day

Number of days required to sell remaining 83 tickets if 10 tickets is sold everyday = 83÷10=8.3

Nadia will need minimum of 8+1=9 days to sell the tickets.

Option D 9 is the right answer.

7 0

3 years ago

Read 2 more answers

The isotope samarium-151 decays into europium-151, with a half-life of around 96.6 years. A rock contains 5 grams of samarium-15

Olegator [25]

Part A:

The amount of substance left of a radioactive substance with a half life $t_{ \frac{1}{2} }$ and amount of initial substance $N_0$ is given by

$N(t)=N_0\left( \frac{1}{2} \right)^{ \frac{t}{t_{ \frac{1}{2} }} }$

Given that the isotope samarium-151 has a half-life of around 96.6 years and the rock contains 5 grams of samarium-151 when it reaches its closure temperature, and it contains 0.625 grams when it is discovered.

The time since the rock reached its closure temperature is obtained as follows:

$0.625=5\left( \frac{1}{2} \right)^{ \frac{t}{96.6} } \\ \\ \Rightarrow\left( \frac{1}{2} \right)^{ \frac{t}{96.6} }= \frac{0.625}{5} =0.125 \\ \\ \Rightarrow\frac{t}{96.6}\log{ \frac{1}{2} }=\log0.125 \\ \\ \Rightarrow\frac{t}{96.6}= \frac{\log0.125}{\log{ \frac{1}{2} }} =3 \\ \\ \Rightarrow t=3(96.6)=289.8$

Therefore, the time since the rock reached its closure temperature is 289.8 years.

Part B:

Given that the rock contains 5 grams of samarium-151 when it reaches its closure temperature, and it contains 0.625 grams when it is discovered. The number of grams of europium-151 when the rock was discovered is 5 - 0.625 = 4.375

7 0

4 years ago

Six less than the quotient of a number and 7 is 8. Help

elena55 [62]

Answer:

X ÷ 7 - 6 = 8

Is your expression.

8 0

3 years ago

Read 2 more answers

The graph of the following system of equations is (4 points)

Vesna [10]

$\left\{\begin{array}{ccc}-2x+y=3\\4x+2y=2&|divide\ both\ sides\ by\ 2\end{array}\right\\\left\{\begin{array}{ccc}-2x+y=3&|add\ (-2x)\ to\ both\ sides\\2x+y=1&|subtract\ 2x\ from\ both\ sides\end{array}\right\\\left\{\begin{array}{ccc}y=2x+3\\y=-2x+1\end{array}\right\Rightarrow\ the\ slope \left\{\begin{array}{ccc}m=2\\m=-2\end{array}\right\ |different\\\\Conclusion:\ \boxed{\boxed{C}\ intersecting\ lines}$

6 0

4 years ago

Read 2 more answers

The mean of the numbers 15,21,17,26,18 and 29 is 21. Calculate the standard deviation.

kherson [118]

Answer:

4.62910049578

Step-by-step explanation:

variation is standard deviation squared

variance = 21.428571428571

square root variance for answer.

6 0

3 years ago