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Dafna11 [192]
3 years ago
12

Evaluate the following expression if a = -6, b = 2/3 and c = -5.5 : -ab - ac

Mathematics
2 answers:
11111nata11111 [884]3 years ago
3 0

Answer:

-29

Step-by-step explanation:

-ab-ac

= -(-6)(2/3)-(-6)(-5.5)

=4-33

= -29

TiliK225 [7]3 years ago
3 0

Answer:

-29

Step-by-step explanation:

-ab - ac

a = -6, b = 2/3 and c = -5.5

Substitute these values into the equation

- (-6) * 2/3 - (-6) (-5.5)

Negative negatives are positive

6 *2/3 +6(-5.5)

Multiply and divide

4 -33

Add and subtract

-29

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It is known that the distance in metres through which a body falls freely varies directly as the square of the time taken. If a
erma4kov [3.2K]

Answer:

125 meters

Step-by-step explanation:

Let distance = d and time is t

Using the variation;

d = k t^2

So let’s us get k

80 = k * 4*2

16k = 80

k = 80/16 = 5

So for 5 seconds, the distance would be;

d = 5 * 5^2

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4 0
3 years ago
Let R be the event that a randomly chosen person lives in the city of Raleigh. Let O be the event that a randomly chosen person
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Answer:

P(O|R)

Step-by-step explanation:

The conditional probability notation of two events A and B can be written as either P(A|B) or P(B|A).

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In the question,

Event R = Person lives in the city of Raleigh

Event O = Person is over 50 years old

The statement says, 'given that the person lives in Raleigh' which means that event R has already occurred and we need to find the probability of event O (the randomly chosen person is over 50 years old).

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P(O|R)

7 0
3 years ago
Combine like terms.
Ivahew [28]
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5 0
3 years ago
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Answer:

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6 0
3 years ago
If 5x - 3y = 1 and x = 2y - 4, then x • y = ?
Inessa05 [86]

Answer:

x = 2,  y = 3

Step-by-step explanation:

i) It is given that 5x - 3y =1

ii) It is also given that x = 2y - 4

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v) Therefore x = 2.

4 0
3 years ago
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