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fredd [130]
3 years ago
15

The angle a vector makes with the x-axis of a coordinate system must be what size in order to make one or more of its components

negative? A) Less the 30 degrees B) between 30 and 60 degrees C) between 61 and 90 degrees D) greater then 90 degrees
Mathematics
2 answers:
marta [7]3 years ago
7 0
D) greater than 90 degrees

_____
An angle greater than 90 degrees will put it in the second quadrant, where the x-component is negative.
rodikova [14]3 years ago
6 0

Answer:

Greater than 90 degrees.

Step-by-step explanation:

Let a vector R make angle \theta with the x-axis. Then, the component along the x-axis would be

R cos\theta

Component along y-axis would be

R sin\theta

For 0 both the components will be positive and lie in the first quadrant. If angle of vector is more than 90 degrees, one of the components would be negative. For example, angle between 90 to 180 degrees, x-component would be negative while between 180-270 degrees, both the components would be negative.

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the diameter of a gigantic Ferris wheel is 185 meters. if a man rides a ferris wheel for one revolution find how far he travels
lidiya [134]

Answer:

Step-by-step explanation:

You need to find out the circumference of the Ferris wheel

C=d*3.14=185*3.14=580.90 m

6 0
3 years ago
Lisa's weekly pay increases from $525 to $546<br> Calculate her percentage pay increase.
Lana71 [14]
546 - 525 = 21

21 is 4% of 525.


Lisa gained a 4% pay increase.
6 0
3 years ago
If is valid : a ²- b ² = 117 and a - b = 3, then what is the value of the expression a + b ?
juin [17]

Answer:

d is the correct answer from give questions

7 0
3 years ago
One day a store sold 21 sweatshirts. white ones cost​ $9.95 and yellow ones cost $ 11.50. in​ all, ​$235.30 worth of sweatshirts
FromTheMoon [43]
For this problem you have yo set up two equations.

White shirts = w Yellow shirts = y

1st: w + y = 21
2nd: 9.95w + 11.50y = 235.30

Now we're going to do system of equations using substitution.

If w + y = 21, then y = 21 - w
If y = 21 - w, then you can substitute this in the second equation for y.

9.95w + 11.50(21 - w) = 235.30
9.95w + 241.5 - 11.50w = 235.30
-1.55w + 241.5 = 235.30
-1.55w = -6.2
w = 4, so 4 whites shirt were sold.

Now I'm finding out how many yellow shirts were sold using one of the two equations at the top.

w + y = 21
4 + y = 21
y = 17

So 17 yellow shirts were sold and 4 white shirts were sold.
5 0
3 years ago
What is the total cost of 0.5 pound of peaches selling for $0.80 per pound and 0.7 pound of oranges selling for $0.90 pet pound?
kari74 [83]
The total cost for peaches is $0.40 you get that by (0.5)(0.80) as for oranges (0.7)(.90)=$0.63 so $0.40+$0.63=$1.03
3 0
3 years ago
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