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4 years ago

Can someone help me!

Mathematics

1 answer:

Rom4ik [11]4 years ago

5 0

All reals numbers from 0 to 200, inclusive.

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If 40% of a number is 14, find 20% of that number.

Tom [10]

Answer:

Step-by-step explanation:

Because half of 40% is 20%

So 14%2 = 7

5 0

3 years ago

The graph shows the relationship between the number of minutes Maria spent jogging on a treadmill and the distance she jogged.

alina1380 [7]

Answer:

0.1 miles per minute

Step-by-step explanation:

The line goes through (0, 0), so Maria's speed is the ratio of miles to minutes:

(4.5 mi)/(45 min) = 0.1 mi/min

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3 years ago

Using Cramer's rule to solve linear systems.

Rzqust [24]

Answer: Last Option

$x=2,\ y=-5$

Step-by-step explanation:

Cramer's rule says that given a system of equations of two variables x and y then:

$x =\frac{Det(A_X)}{Det(A)}$

$y =\frac{Det(A_Y)}{Det(A)}$

For this problem we know that:

$Det(A) = |A|=\left|\begin{array}{ccc}4&-6\\8&-2\\\end{array}\right|$

Solving we have:

$|A|= 4*(-2) -(-6)*8\\\\|A|=40$

$Det(A_X) = |A_X|=\left|\begin{array}{ccc}38&-6\\26&-2\\\end{array}\right|$

Solving we have:

$|A_X|=38*(-2) - (-6)*26\\\\|A_X|=80$

$Det(A_Y) = |A_Y|=\left|\begin{array}{ccc}4&38\\8&26\\\end{array}\right|$

Solving we have:

$|A_Y|=4*(26) - (38)*8\\\\|A_Y|=-200$

Finally

$x =\frac{|A_X|}{|A|} = \frac{80}{40}\\\\x=2$

$y =\frac{|A_Y|}{|A|} = \frac{-200}{40}\\\\y=-5$

4 0

3 years ago

Suppose that on each play of a game, a gambler either wins 1 with probability p or loses 1 with probability 1–p (or q). The gamb

musickatia [10]

Answer:

Step-by-step explanation:

From the given information,

Considering both cases when p = 0.5 and when p ≠ 0.5

the probability that the gambler will quit an overall winner is:

$P = \dfrac{1 - (\dfrac{1-p}{p} )^K}{1- (\dfrac{1-p}{p})^N } \ \ \ is \ p \neq 0.5 \ and\ K/N = \dfrac{1}{2}$

where ;

N.k = n and k = m

Hence, the probability changes to:

$P = \dfrac{1 -(\dfrac{1-p}{p})^m}{1 -(\dfrac{1-p}{p})^{m+n}}$ is p ≠ 0.5 and k/N = $\dfrac{m}{m+n}$ is P = 0.5

3 0

3 years ago

Evaluate the expression w 2 - v + 1 for w = -2 and v = -8.

Aleksandr [31]

Answer:

Is the w2, w(2) or

${w}^{2}$

If it's w(2) the answer is -4--8+1=-4+8+1=5

if it's w^2 then the answer would be 4--8+1=4+8+1=13

4 0

2 years ago