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3 years ago

Evaluate -3 3 -27 -9 9 27

Mathematics

2 answers:

s2008m [1.1K]3 years ago

4 0

I believe the answer is -27

Vlada [557]3 years ago

3 0

Answer:

-27

Step-by-step explanation:

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At 82°F, a certain insect chirps at a rate of 61 times per minute, and at 91°F, they chirp 124 times per minute. Write an equati

Ganezh [65]

Answer:

$y=7x-513$

Step-by-step explanation:

Let

x----> the temperature in degrees Fahrenheit

y ---->insect chirping rate in times per minute

we have the ordered pairs

(82,61) and (91,124)

step 1

Find the slope

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

substitute the values

$m=\frac{124-61}{91-82}$

$m=\frac{63}{9}=7$

step 2

Find the equation of the line

we know that

The equation in slope intercept form is equal to

$y=mx+b$

where

m is the slope

b is the y-intercept

we have

$m=7$ ---> the units are chirps per minute/degree F

take the point (82,61)

substitute and solve for b

$61=7(82)+b$

$61=574+b$

$b=-513$

substitute

$y=7x-513$

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3 years ago

For y = x^2 + 10x + 24, write the axis of symmetry, the vertex, and whether the

mylen [45]

Answer:

x= - 2

Step-by-step explanation:

hello :

note : the equation of the axis symmetry for the parabola : y =ax²+bx+c

when : a≠ 0 is : x=- b/2a

in this exercice : a=1 and b=10

so : x= -10/2 = -5

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3 years ago