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Murljashka [212]
3 years ago
7

X-2 Find the numerical value of 2x² - 7x - 15 when x=-2.

Mathematics
1 answer:
zimovet [89]3 years ago
4 0

Answer:

-21

Step-by-step explanation:

2^2 equals 4, multiplied by 2 is 8, subtracted from 7(2) equals -6, sutracted from 15 gives up -21

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Which color is the line that represents an equivalent ratio? How can you tell by looking at the lines? A) blue; The graph is a v
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Answer:

C) pink; The graph of the pink line passes through the origin.

6 0
3 years ago
Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE
EleoNora [17]

Answer:

0, 10

Step-by-step explanation:

The given function is:

g(y) = \frac{y-5}{y^2-3y+15}

According to the quotient rule:

d(\frac{f(y)}{h(y)})  = \frac{f(y)*h'(y)-h(y)*f'(y)}{h^2(y)}

Applying the quotient rule:

g(y) = \frac{y-5}{y^2-3y+15}\\g'(y)=\frac{(y-5)*(2y-3)-(y^2-3y+15)*(1)}{(y^2-3y+15)^2}

The values for which g'(y) are zero are the critical points:

g'(y)=0=\frac{(y-5)*(2y-3)-(y^2-3y+15)*(1)}{(y^2-3y+15)^2}\\(y-5)*(2y-3)-(y^2-3y+15)=0\\2y^2-3y-10y+15-y^2+3y-15\\y^2-10y=0\\y=\frac{10\pm \sqrt 100}{2}\\y_1=\frac{10-10}{2}= 0\\y_2=\frac{10+10}{2}=10

The critical values are y = 0 and y = 10.

5 0
3 years ago
Which irrational number can be multiplied by –StartRoot 41 EndRoot to get a product that equals 1?
Marta_Voda [28]

Answer:

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5 0
3 years ago
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kkurt [141]
X = the amount of water to add
10 - x = amount of 18% bleach to add

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therefore 6 2/3 liters bleach

4 0
3 years ago
in mrs. wallace class's science class, 1/2 of the students are boys. Of the boys , 1/8 are left- handed. what fraction of the st
o-na [289]

Answer:

1/16 of the class are left handed boys but we do not know the amount of left handed girls so we cannot be sure.

Step-by-step explanation:

1/2 * 1/8 = 1/16

there is still no way to be sure of how many girls are left handed so you should probably make a note by the problem so the mistake on the test will be realized

4 0
3 years ago
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