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4 years ago

Vera bought a black velvet dress because it was on sale for 25%off. The original price was $73. How much did Vera save?

Mathematics

2 answers:

Olin [163]4 years ago

6 0

That would be $54.75

Igoryamba4 years ago

3 0

The original price was $91.25

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Closing prices of two stocks are recorded for 50 trading days. The sample standard deviation of stock X is 4.665 and the sample

Vedmedyk [2.9K]

Answer:

0.9113

Step-by-step explanation:

Given :

Sample standard deviation of Stock X = 4.665

Sample standard deviation of Stock Y = 8.427

Sample Covariance = 35.826

The Correlation Coefficient, R is related to sample covariance and standard deviation using the formular :

R = Covariance(X, Y) / (SD(X) * (SD(Y))

R = 35.826 / (4.665 * 8.427)

R = 35.826 / 39.311955

R = 0.9113

Hence, correlation Coefficient, R = 0.9113 which depicts a strong positive relationship.

6 0

3 years ago

If AB is parallel to CD, and CD = 20, BD = 6, DE = 8, what is the length of AB?

castortr0y [4]

Answer:

Option b. 35 units

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent

in this problem triangle ABE and triangle CDE are similar by AA Similarity Theorem

$\frac{AB}{DC}=\frac{BE}{DE}$

substitute the given values

$\frac{AB}{20}=\frac{14}{8}$

Solve for AB

$AB=\frac{14}{8}(20)$

$AB=35\ units$

5 0

3 years ago

sam has to climb to the top of the building for his firefighter training. he doesn’t know how high it is. he is 6ft y’all and hi

Virty [35]

The height of building is 35 feet

Solution:

Given that,

Sam is 6 feet tall and his shadow is 3.6 feet tall

The shadow of building is 21 feet long

To find: height of building

We can solve this by setting up a ratio comparing the height of the building to the height of the Sam and shadow of the building to the shadow of the Sam

Let us consider,

$h_b$ = height of building

$h_m$ = height of Sam

$s_b$ = shadow of building

$s_m$ = shadow of Sam

Therefore,

$\frac{\text {height of building}}{\text {shadow of building}}=\frac{\text {height of Sam}}{\text {shadow of Sam}}$

$\frac{h_{b}}{S_{b}}=\frac{h_{m}}{S_{m}}$

Substitute the values,

$\begin{aligned}&\frac{h_{b}}{21}=\frac{6}{3.6}\\\\&h_{b}=\frac{6}{3.6} \times 21\\\\&h_{b}=35\end{aligned}$

Thus height of building is 35 feet

5 0

3 years ago

(2,-4), (x,\ y), A, and B all lie on the line. Find an equation relating x and y.

Olin [163]

Answer:

I can't see the picture, sorry. :(

Step-by-step explanation:

4 0

3 years ago

A group of friends wants to go to the amusement park. They have

Murrr4er [49]

Answer:

Step-by-step explanation: The answer is 6 friends. Assuming that the group is going in one car. Leaving them with 100.5 to spend on admission.You can add the admission fee 6 times until they have nothing left

8 0

3 years ago