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3 years ago

Need help finding the answer for this one if you know it please help

Mathematics

1 answer:

Dahasolnce [82]3 years ago

5 0

Just move the negative in front of the fraction !

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How do solve this problem

Tanzania [10]

Multiply the first equation by 3
21x+15y=-6

Add this to the second equation
21x+15y=-6
-21x-15y=6
0+0=0

True

Final answer: Infinitely Many Solutions (they are coinciding lines)

8 0

3 years ago

Erica makes 27 dollers every 4 1/2 hours. How much does she make for 12 hours ?

kodGreya [7K]

Answer:

72 dollars I believe

Step-by-step explanation:

5 0

3 years ago

There is a 70% chance that your car will get stuck in the snow during the next big snow fall. Given that you are already stuck i

nikdorinn [45]

Answer:

63%

Step-by-step explanation:

This is a problem of conditional probability.

The two events that are given are:

Car stuck in the snow - Let it be event S. P(S) = 70% = 0.70
Require a tow truck - Let it be event T.

We have to find the probability of being stuck in the snow AND requiring a tow truck which can be given as P(S and T)

We are also given the conditional probability, which is P(T | S) = 90% = 0.90

Using the given formula for our case we can modify the formula as:

$P(T|S)=\frac{P(S \cap T)}{P(S)}$

$0.90=\frac{P(S \cap T)}{0.70}\\\\ P(S \cap T)=0.90 \times 0.70\\\\ P(S \cap T)=0.63$

Therefore, there is 63% (0.63) chance that you will get stuck in the snow with your car AND require a tow truck to pull you out

4 0

3 years ago

Geometry, i think my answer is wrong

Anna71 [15]

Answer:

23°

Step-by-step explanation:

mABD is just the angle of B

9x-22 = 6x -7

3x -22 = -7

3x = 15

x = 5

9(5) -22

45-22

3 0

2 years ago

What is -a ^-2 if a=-5 A. -25 B.25 C.-1/25 D.1/25

Dmitrij [34]

Answer:

-1/25

Step-by-step explanation:

- (a)^-2

Let a = -5

- (-5)^-2

-1/(-5)^2

-1/25

3 0

3 years ago

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