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alisha [4.7K]
3 years ago
14

Subtract: x^2+4xy −3y^2 from 2x^2−5xy+y^2

Mathematics
2 answers:
slavikrds [6]3 years ago
8 0

2x^2−5xy+y^2 - (x^2+4xy −3y^2)

= 2x^2−5xy + y^2 - x^2 - 4xy + 3y^2

= x^2 - 9xy + 4y^2


answer

x^2 - 9xy + 4y^2

Zina [86]3 years ago
8 0

if you combine your like terms you would get -xy-x^2-2y^2. hope that helps!

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Which graph represents the following piecewise defined function?
kenny6666 [7]
The correct answer is shown in attached figure
To find the correct graph, we should study the continuity of the function

Check the continuity at x = -2
from the left ⇒⇒ f(-2) = 1/2 * -2 + 3 = 2
from the right ⇒⇒ f(-2) = 2
∴ The function is continuous at x = -2

Check the continuity at x = 3
from the left ⇒⇒ f(3) = 2
from the right ⇒⇒ f(3) = 2*3 - 3 = 3
∴ The function is jump discontinuous at x = 3


From the previous results the correct graph is the last as shown in attached graph.



5 0
3 years ago
Read 2 more answers
What is the trinomial factor of 20t^2-13tv-15v^2
lapo4ka [179]
20t² - 13tv - 15v²
20t² - 25tv + 12tv - 15v²
(5t + 3v)(4t - 5v)
8 0
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Solve the inequality and graph the solution 2|x+1/3|<9
bagirrra123 [75]
The answer for this equation is x < 1
7 0
3 years ago
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 330 grams and a standard deviati
just olya [345]

Answer:

Weights of at least 340.1 are in the highest 20%.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 330, \sigma = 12

a. Highest 20 percent

At least X

100-20 = 80

So X is the 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.842.

Z = \frac{X - \mu}{\sigma}

0.842 = \frac{X - 330}{12}

X - 330 = 12*0.842

X = 340.1

Weights of at least 340.1 are in the highest 20%.

3 0
3 years ago
What is 9 times 2.75
goldfiish [28.3K]
9 times 2.75 equals 24.75
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3 years ago
Read 2 more answers
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