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Rama09 [41]
3 years ago
9

in a tournament, amanda scored 136 points in the first round and 127 points in the second round whatwas her percentage change be

tween the two rounds
Mathematics
1 answer:
skelet666 [1.2K]3 years ago
5 0
Percent change = (new number - old number)/(old number) * 100

percent change = (127 - 136)/(136) * 100

percent change = -6.62%

Since the percent change is negative it is a percent decrease.

Answer: 6.62% decrease.
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A/n _______ is a quadrilateral that has two pairs of congruent sides and two pairs of parallel sides.
gogolik [260]
I’m guessing a parallelogram
4 0
3 years ago
What is the best approximation of the projection of (5,-1) onto (2,6)?
Hatshy [7]

Answer:

Hence, the scalar projection of \vec a onto \vec b= \frac{\sqrt{10} }{5}, and  the vector projection of \vec a onto \vec b = \frac{1}{5} \hat i+\frac{3}{5} \hat j.

Step-by-step explanation:

We have given two points  (5, -1) and (2, 6).

Let,     \vec a=5\hat {i}-\hat {j}  and  \vec b= 2\hat {i}+6\hat{j} .

and we have calculate the projection of \vec a onto \vec b.

Now,

For the calculation of projection, first we need to calculate the dot product of  \vec a  and \vec b.

\vec a.\vec b=(5\hat {i}-\hat{j}).(2\hat{i}+6\hat{j})

     =10-6

     =4

then, we have to calculate the magnitude of \vec b.

   \mid {\vec {b}}\mid = \sqrt{2^{2}+6^{2}  } = \sqrt{40} = 2\sqrt{10}.

Now, the scalar projection of \vec a onto \vec b = \frac{\vec a.\vec b}{\mid b\mid}

                                                                 = \frac{4}{2\sqrt{10} }\frac{2}{\sqrt{10} } \times\frac{\sqrt{10} }{\sqrt{10} } =\frac{2\sqrt{10} }{10} = \frac{\sqrt{10} }{5}

and the vector projection of \vec a onto \vec b = \frac{\vec a. \vec b}{\mid\vec b \mid^{2} } . \vec b

                                                               = \frac{4}{40} . (2\hat i+ 6\hat j)

                                                                = \frac{1}{5} \hat i+\frac{3}{5} \hat j

Hence, the scalar projection of \vec a onto \vec b= \frac{\sqrt{10} }{5}, and  the vector projection of \vec a onto \vec b = \frac{1}{5} \hat i+\frac{3}{5} \hat j.

                                                               

6 0
3 years ago
Can I get some help on this problem? Thanks guys yo its really easy but I cant figure it out 
alina1380 [7]

Answer:

x is equal to 15.

Step-by-step explanation:

In order to solve this, we need to set it up as a proportion.

6/8 = x/20

Now that we have the proportion, we need to cross multiply to solve.

6*20 = 8*x

120 = 8x

15 = x

8 0
3 years ago
HELP HELP I NEED HELP ASAP PLEASE!!
alexira [117]

Answer:

try 87 or 86

Step-by-step explanation:

6 0
3 years ago
4. Let c(t) be the number of customers in a department store t hours after 8 A.M. Explain the meaning
kipiarov [429]

Answer:

See explanation below.

Step-by-step explanation:

a) c(0) = 10

Here, t = 0 and c(0) = 10

At 8 A.M., there are 10 customers.

b) c(6) = c(7)

6 hours after 8 am is 2pm

7 hours after 8 am is 3pm

They are equal. So it means

There are the same number of customers at 2pm and at 3pm

c)

c(k) = 0

There are no customers, k hours after 8 am

d)

c(4) > c(3)

4 hours after 8 am is 12pm

3 hours after 8 am is 11am

This means:

The number of customers at 12pm is greater than the number of customers at 11am

4 0
3 years ago
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