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3 years ago

Complete the system of linear equations so that there are infinitely many solutions.

Mathematics

2 answers:

Alika [10]3 years ago

6 0

Answer:

3x + 5y = 2

Step-by-step explanation:

y = -3/5 x + 2

multiply both sides by 5

5y = -3x + 2

add 3x to both sides

3x + 5y = 2

note: if it really has to be equal to 20, then multiply both sides by 10, which will result in 30x + 50y = 20

yKpoI14uk [10]3 years ago

5 0

Answer:

y-intercept:

(0,2) or just -3/5

Step-by-step explanation:

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what is the probability of a chance event is 0.05, it to happen when compared to a chance event with a probability of 0

BabaBlast [244]

Answer:

I can't understand

Step-by-step explanation:

I will just try to rewrite your question so someone lese can answer it.

"What is the probability of a chance event, with a probability of 0.05, to happen when compared to a chance event with a probability of 0."

or just what is the probability(how high or low are the chances) of an event with a very low chance of happening when compared to an event that can never happen.

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3 years ago

Solve 8x + c = k for x.

alex41 [277]

Answer: $x=\frac{c-k}{8}$

Step-by-step explanation:

$1) \text { } 8x+c=k \text{ (given)}\\\\2) \text { }8x=c-k \text{ (subtract } k \text{ from both sides)}\\\\3) \text { } \boxed{x=\frac{c-k}{8}} \text{ (divide both sides by 8)}$

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2 years ago

Use Cramer's rule to solve the following system of equations.

sp2606 [1]

5x + 3y = 7> (4) 5x + (4) 3y = (4) 7 4x + 5y = 3> (-5) 4x + (-5) 5y = (-5) 3 20y + 12y = 28 -20x -25y = -15 (X's cross out) 12y - 25y = 28 -15 -13y = 13 Y = -1 (Plug in for y) 5x + 3(-1) = 7 5x -3 =7 (add 3 to 7) 5x = 10 (divide by 5) X= 2 Ordered Pair= (2, -1)

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3 years ago

A copy was made of Sally’s photograph. The copy resized the photograph so that it measured 4 inches wide by 8 inches long. If th

Veseljchak [2.6K]

4/8 = 20/L cross multiply 4L = (20)(8) 4L = 160 L = 160/4 L = 40 length is 40
Hope this helps!!

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4 years ago

HElp Please its Pre-Calculus Matrix

nekit [7.7K]

The determinant is C. -541.

Using a cofactor expansion along the first row:

$\begin{vmatrix}-8&-4&-1\\1&7&-3\\8&9&9\end{vmatrix} = -8\begin{vmatrix}7&-3\\9&9\end{vmatrix} + 4\begin{vmatrix}1&-3\\8&9\end{vmatrix} - \begin{vmatrix}1&7\\8&9\end{vmatrix} \\\\= -8(7\times9-(-3)\times9) + 4(1\times9-(-3)\times8) - (1\times9-7\times8) \\\\ = -8(63+27) + 4(9+24) - (9-56)\\\\= \boxed{-541}$

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3 years ago