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MrRa [10]
3 years ago
6

b. Two events are dependent if the occurrence of one event changes to occurrence of the second event. True or False

Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
7 0

Answer:

True

Step-by-step explanation:

If 2 events are independent, then one event will not affect the other

Naddika [18.5K]3 years ago
6 0

Answer:

true

Step-by-step explanation:

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a mechanic worked 20 hours. another mechanic worked 15 hours. together they charged a total of $1950. what was the rate charged
Natasha_Volkova [10]

Answer: The mechanics both charged $70 and $45 per hour respectively

Step-by-step explanation: We shall start by calling the mechanics hourly rates x and y respectively. So if one worked for 20 hours and charged 20 times x dollars, and the other one worked for 15 hours and charged 15 times y dollars, totalling 1950 dollars, we can write the following expression,

20x + 15y = 1950

Also, if the sum of the two rates was 115 dollars, that means for working for an hour only, they both would earn

x + y = 115

We now have a pair of simultaneous equations

20x + 15y = 1950 --------(1)

x + y = 115 ------------------(2)

We shall use the substitution method for this problem.

From equation (2), make x the subject of the equation

x = 115 - y

Substitute for the value of x into equation (1)

20(115 - y) + 15y = 1950

2300 - 20y + 15y = 1950

By collecting like terms we now have

2300 - 1950 = 20y - 15y

(Note that when a negative value crosses to the other side of the equation, it becomes a positive value and vice versa)

350 = 5y

Divide both sides of the equation by 5

70 = y

We now substitute for the value of y into equation (2)

x + y = 115

x + 70 = 115

Subtract 70 from both sides of the equation

x = 45.

Therefore, the rate they charged per hour were $45 and $70 respectively.

7 0
3 years ago
Find the area of a triangle with vertices at D(2, 0), E(–1, 0), and F(2, –7).
kati45 [8]
Im suck on the same question 
8 0
3 years ago
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What is (6,2) rotation 270
nignag [31]

Given:

The point is (6,2).

To find:

The image of given point after rotation of 270 degrees.

Solution:

Let the given point be P(6,2).

Rotation of 270 degrees means the figure is rotated 270 degrees counterclockwise about the origin. So, the rule of rotation is

(x,y)\to (y,-x)

Using this rule, we get

P(6,2)\to P'(2,-6)

Therefore, the image of given point is (2,-6).

3 0
3 years ago
Find the perimeter of the squash
Step2247 [10]

Answer:

5x^2-18x -8

Step-by-step explanation:

8 0
3 years ago
Jerome has a job that requires a clean shirt every day. It cost $1.25 to have a shirt washed and ironed. What is the cost for cl
Naily [24]

Answer:

$6.25

Step-by-step explanation:

1.25 x 5 = 6.25

it´s the cost times how ever many days

3 0
3 years ago
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