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3 years ago

Which of the following is an extraneous solution of StartRoot 4 x + 41 EndRoot = x + 5? x = –8 x = –2 x = 2 x = 8

Mathematics

2 answers:

larisa [96]3 years ago

8 0

Answer:

Step-by-step explanation:

took test

Finger [1]3 years ago

5 0

Answer:

-8

Step-by-step explanation:

when you solve for x you get -8 but when you pkug it back in both sides are not equal, making it extranious

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An urn contains 12 balls, of which 4 are white.

wel

Answer:

a) $\frac{1}{3}$

b) $\frac{4}{12}\,,\,\frac{4}{11}\,,\,\frac{4}{10}\,,...$

Step-by-step explanation:

Number of balls in the urn = 12

Number of white balls in the urn = 4

So, number of balls which are not white = 12 - 4 = 8

We know that probability = No. of outcomes/Total number of outcomes

Let $A_i\,,\,B_i\,,\,C_i$ denotes the event of getting white ball by A, B and C

a) each ball is replaced after being drawn.

Probability = Number of white balls/Total number of balls

Solution: $P(A_i)=P(B_i)=P(C_i)=\frac{4}{12}=\frac{1}{3}$

b)the balls that are withdrawn are not replaced.

Solution:

If A wins: $P(A_1)=\frac{4}{12}=\frac{1}{3}$

If A lost and B wins: $P\left ( B_1|A_1^{c} \right )=\frac{4}{11}$

If A and B lost and C wins: $P\left ( C_1|A_1^{c}\,B_1^{c} \right )=\frac{4}{10}$

and so on....

4 0

3 years ago

What is the correct answer?

Nastasia [14]

Answer:

C) (-3, -1)

Step-by-step explanation:

y = 5/3x + 4

When x = 0, y = 4

When y = 0, x = -2.4

graph the points: (0, 4) and (-2.4, 0)

y = -2/3x - 3

When x = 0, y = -3

When y = 0, x = -4.5

graph the points: (0, -3) and (-4.5, 0)

The lines will cross at point: (-3, -1)

4 0

3 years ago

If ON is a midsegment of KLM, find LM. A.2 B.3 C.4 D.5

Aleksandr-060686 [28]

NO is 2 times LM

2(x+1) = 4x

2x + 2 = 4x

2 = 2x

1 = x

Plug that in for 4x

4(1)

4

4 0

3 years ago

Read 2 more answers

The base of a cab in New York is $2.50 as soon as you enter the cab. There is an additional charge of $2.50 per mile traveled. C

Anastaziya [24]

Answer:

7 miles

Step-by-step explanation:

3 0

3 years ago

21. How many different integers can have the same absolute value? Give an example.

charle [14.2K]

2 integers at a time!

6 0

3 years ago