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3 years ago

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

Genrish500 [490]

Answer:

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

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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:

StartRoot StartFraction 1 Over 41 EndFraction EndRoot

Negative StartRoot 41 EndRoot

Negative StartRoot StartFraction 1 Over 41 EndFraction EndRoot

StartRoot 41 EndRoot

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3 years ago

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kkurt [141]

X = the amount of water to add
10 - x = amount of 18% bleach to add

.18(10-x)= .12 x 10
1.8 -.18x =1.2
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x = 3 1/3 liters water
therefore 6 2/3 liters bleach

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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

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3 years ago