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Dmitrij [34]
3 years ago
15

What are the zeroes of y=x^2-2x-15? Choices: A. -3,-5 B. 3,5 C. -3,5 D. 3,-5

Mathematics
1 answer:
max2010maxim [7]3 years ago
7 0
Option C. -3 and 5


Hope I didn't mess up for your sake!
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(12,5)<br> (1, 2)<br> (1, 19)<br> Is this relation a function?<br><br> yes<br> no
umka2103 [35]

Answer:

No

Step-by-step explanation:

A function has 1 y-value for each x-value, but in this situation, the x-value of 1 has both a y-value of 2 and 19 making it not a function.

3 0
2 years ago
Negative nine minus negative ten?
ankoles [38]

Answer:

-9 - 10 = -19

Step-by-step explanation:

If both numbers are a negative, then add them together but keep the negative or minus sign

Hope this Helps!!!

4 0
3 years ago
Triangle PQR has vertices P(4,-1),Q(-2,7), and R(9,9). Find an equation of the median and altitude from R.
Reil [10]
If we are drawing altitude from R the PQ will be base of this triangle. So we can say Median from R will cut on Midpoint of PQ. So firstly we will find mid point of PQ Which is S given as below:
P(4,-1) , Q (-2,7)

Let Co-ordinate of S is (x,y)
So x =  \frac{x_1+x_2}{2}
x =  \frac{4-2}{2} =  \frac{2}{2} = 1

y =  \frac{y_1+y_2}{2}
y =  \frac{-1+7}{2} =  \frac{6}{2}= 3
So midpoint of PQ is S(1,3).

Now we can find equation of RS
Co-ordinate of R is (9,9) and and S is (1,3).

In general equation of line from two point (x_1 , y_1) and (x_2,y_2) is
(y-y_1) =  \frac{y_2-y_1}{x__2-x_1}(x-x_1)

So equation of RS is

(y-9) =  \frac{9-3}{9-1} (x-1)
(y-9) =  \frac{6}{8}(x-1)
8(y-9) = 6(x-1)
8y-72 = 6x - 6
-72+6 = 6x - 8y
-66 = 6x-8y

So the equation of median is 6x - 8y = -66

5 0
3 years ago
Read 2 more answers
Out of 100 emails, 60 are spam and 48 of those contain the word buy. Of the remaining 40 emails that are not spam, only 4 emails
nekit [7.7K]
48/60 or 0.8 if you know it's spam already, but 0.48 if you are picking randomly from 100 emails

6 0
3 years ago
Read 2 more answers
The average winter snowfall in City A is 105 cm. City B usually gets 2.8 m of snow each winter. Compare the yearly snowfall in t
Inessa [10]
We see that city A gets 105 cm of snow while city B gets 2.8 m. The first thing we do is make both measurements equal to each other. This can be done by either converting city A's 105 centimeters to meters or city B's meters to centimeters. But the question specifically calls for both, so we get both measurements.

City A: 105 centimeters OR 1.05 meters
City B: 280 centimeters OR 2.8 meters

Now that we know the measurements, let's look at the first problem. (A) asks for the difference in one year in meters. The difference of course means subtraction. Now it's here where I personally am confused on what it asking for in terms of which city is it asking for us to subtract from, but using an educated guess, I'll say we're subtracting from city B because if we were to subtract from city A, we'd have a negative, and you can't have a negative amount of snow, only 0 snow.

So once again, for question (A), we subtract 1.05 from 2.8 (2.80 - 1.05) and we get 1.75 meters of snow.

Question (B) asks for the difference during two years in centimeters, so we multiply both measurements by 2 and use the centimeter measurements. (105 x 2 = 210) (280 x 2 = 560) Subtract 560 from 210 (560 - 210) and we get 350 centimeters.

So your answers are: (A) 1.75 meters (B) 350 centimeters

I hope this helps!
5 0
4 years ago
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