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3 years ago

WILL MAKE BRAINLIEST!!

Mathematics

2 answers:

qwelly [4]3 years ago

7 0

Answer:

(a) Jun's work was correct as far as it went, but she didn't go far enough.

(b) (1, 5) and (-4, 30)

Step-by-step explanation:

y = x² + 10x – 6

y = 7x – 2

(a) Jun’s solution:

y = x² + 10x – 6

y = 7x – 2

x² + 10x – 6 = 7x – 2

x² + 3x – 4 = 0

(x – 1)(x + 4) = 0

x = 1 or x = -4

Jun's work was correct to this point, but she didn't go far enough. She calculated the x-intercepts of the combined equation, not the values of x and y at which the two equations intersect.

Jun must calculate the value of y that corresponds to each value of x.

(b) The correct solution

Continue Jun's calculations

y = 7x -2 y = 7x - 2

Set x = 1 Set x = -4

y = 7 - 2 y = -28 -2

y = 5 y = -30

The correct solutions are (1, 5) and (-4, 30).

The Figure below shows the graphs of each function with the intersection points at (1, 5) and (-4, 30).

Naddika [18.5K]3 years ago

5 0

Answer:

B. juans solution is incorrect

Step-by-step explanation:

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Answer:

We know that in the box there are:

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b) same reasoning than in the previous case:

For the first bar, the probability is:

p = 3/7

for the second bar, the probability is:

q = 2/6 = 1/3

The joint probability is:

P = p*q = (3/7)*(1/3) = 1/7

c) Suppose that first we draw a twix.

The probability we already know that is:

p = 4/7

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q = 3/6

The joint probability is:

P = p*q = (4/7)*(3/6) = 2/7

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3 years ago

Read 2 more answers

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Lesechka [4]

Answer:

C. y = 3x + 13.

Step-by-step explanation:

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3 years ago

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Answer:

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3 years ago