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Sphinxa [80]
3 years ago
13

HELP PLZ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
Maurinko [17]3 years ago
5 0

Answer:

D. x=-5,y=\frac{5}{4}

Step-by-step explanation:

\begin{bmatrix}5x+4y=-20\\ 5x+12y=-10\end{bmatrix}

Subtract Equation 2 - Equation 1:

5x+12y=-10\\-\\\underline{5x+4y=-20}\\8y=10

Divide both sides by 8:

\frac{8y}{8}=\frac{10}{8}

y=\frac{5}{4}

Substitute y=\frac{5}{4} into Equation 1:

5x+4y=-20

5x+4\times \frac{5}{4}=-20

5x+5=-20

Subtract 5 from both sides:

5x+5-5=-20-5

5x=-25

Divide both sides by 5:

\frac{5x}{5}=\frac{-25}{5}

x=-5

Bas_tet [7]3 years ago
4 0

Answer:

c

Step-by-step explanation:

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3 years ago
A monk crossbred plants which can have purple or white flowers and obtained 511 plants with white flowers and 337 plants with pu
Zepler [3.9K]

Answer:

For purple;

P(p) = 337/848 = 0.40

For white;

P(w) = 511/848 = 0.60

Step-by-step explanation:

Given;

Number of plants with purple flowers P = 337

Number of plants with white flowers W = 511

Total T = 337 + 511 = 848

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the empirical Probability that a plant had purple flowers P(p) is

P(p) = Number of plants with purple flowers/total number of plants

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For white;

the empirical Probability that a plant had white flowers P(w) is

P(w) = Number of plants with white flowers/total number of plants

P(w) = W/T

Substituting the values, we have;

P(w) = 511/848 = 0.60

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Step-by-step explanation:

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