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3 years ago

Pls help me on numbers 8 and 9 AND SHOW ME HOW U DID IT

Mathematics

2 answers:

Elena L [17]3 years ago

7 0

Number 9 is C. (-1,0) :)

Sati [7]3 years ago

6 0

It's B. Whenever you multiply something by a fraction, it's the same as dividing it with the denominator. So basically 12*(1/3) = 12/3.

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(Anderson, 1.14) Assume that P(A) = 0.4 and P(B) = 0.7. Making no further assumptions on A and B, show that P(A ∩ B) satisfies 0

Goshia [24]

Answer with Step-by-step explanation:

We are given that

P(A)=0.4 and P(B)=0.7

We know that

$P(A)+P(B)+P(A\cap B)=P(A\cup B)$

We know that

Maximum value of $P(A\cup B)$ =1 and minimum value of $P(A\cup B)$ =0

$0\leq P(A\cup B )\leq 1$

$0\leq P(A)+P(B)-P(A\cap B)\leq 1$

$0\leq 0.4+0.7-P(A\cap B)\leq 1$

$0\leq 1.1-P(A\cap B)\leq 1$

$0\leq 1.1-P(A\cap B)$

$P(A\cap B)\leq 1.1$

It is not possible that $P(A\cap B)$ is equal to 1.1

$1.1-P(A\cap B)\leq 1$

$-P(A\cap B)\leq 1-1.1=-0.1$

Multiply by (-1) on both sides

$P(A\cap B)\geq 0.1$

Again, $P(A\cup B)\geq P(B)$

$0.4+0.7-P(A\cap B)\geq 0.7$

$1.1-P(A\cap B)\geq 0.7$

$-P(A\cap B)\geq -1.1+0.7=-0.4$

Multiply by (-1) on both sides

$P(A\cap B)\leq 0.4$

Hence, $0.1\leq P(A\cap B)\leq 0.4$

3 0

3 years ago

WHAT ARE THE THREE DIFFERENT TYPES OF ANGLES!!!!!!??

Vikentia [17]

Hello there, and thank you for asking your question here on brainly.

Answer: The three different types of angles are an acute angle, which is an angle that is an angle that measures from 1° to 89°. A right angle, that specifically measures to 90°. Finally, an obtuse angle that measures from 91° to 179°. An angle that also measures 180° is a straight line, and is called a straight angle.

Hope this helped you! ♥

6 0

3 years ago

Simplify (-8z+4) + (7z-7)

Karo-lina-s [1.5K]

Answer:

1. -1z-3

2. 4x+2

3. -y+11

4. 7a-22

Step-by-step explanation:

Not too sure about the last one

5 0

3 years ago

PLEASE HELP ME!!! WILL GIVE BRAINLIEST! PLEASE IT SHOULD BE EASY FOR SOMEONE WHO ISNT SUPER SICK!! Please

ArbitrLikvidat [17]

Answer:

D is the answer.

Step-by-step explanation:

You can see if a line is perpendicular by the slope. If the slope is COMPLETELY opposite from another by means of slope, the lines are perpendicular.

-1/4

4/1

...are opposite.

5 0

3 years ago

Seth invested a certain amount of money and got back an amount of $ 8400. If

kupik [55]

Answer:

$7700

Step-by-step explanation:

amount invested + interest = total

amount invested + 700 = 8400

Subtract 700 from both sides.

amount invested = 7700

Answer: $7700

5 0

2 years ago