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3 years ago

15

840 students attend Northfield middle school. 65%of students earned a perfect attendance award. How many students didn't earn th

e award?

1 answer:

DochEvi [55]3 years ago

6 0

Answer:

546

Step-by-step explanation:

840 x 0.65 = answer .. in this case 546

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If AC = x + 5 and AB = 3x - 1... what is the length of BC?

Hatshy [7]

If B is the midpoint of AC, then |AB| = |AC|.
|AB| = 3x + 2
|BC| = 5x - 10
Therefore we have the equation:
3x + 2 = 5x - 10 |subtract 2 from both sides
3x = 5x - 12 |subtract 5x from both sides
-2x = -12 |divide both sides by (-2)
x = 6

Read more on Brainly.com - brainly.com/question/11324096#readmore

4 0

3 years ago

At what values of x does f(x) = x^3 - 2x^2 -4x+1 satisfy the mean value theorwm on [0,1]

denis-greek [22]

Answer:

x=1/3

Step-by-step explanation:

A function f is given as

$f(x) = x^3-2x^2-4x+1$ in the interval [0,1]

This function f being an algebraic polynomial is continuous in the interval [0,1] and also f is differntiable in the open interval (0,1)

Hence mean value theorem applies for f in the given interval

$f(1) = 1-2-4+1 = -4\\f(0) = 1$

The value

$\frac{f(1)-f(0)}{1-0} =\frac{-4-1}{1} =-5$

Find derivative for f

$f'(x) = 3x^2-4x-4$

Equate this to -5 to check mean value theorem

$3x^2-4x-4=-5\\3x^2-4x+1=0\\\\(x-1)(3x-1) =0\\x= 1/3 : x = 1$

We find that 1/3 lies inside the interval (0,1)

4 0

3 years ago

Nicole is 56 inches tall and has an 84 inch shadow. Julie is standing next to Nicole and has a 96 inch shadow. How tall is Julie

Natalka [10]

Answer:

56+12=68. 68 inches

Step-by-step explanation:

julie‘s shadow is 12 inches taller than Nicole’ so you would just add 12 to 56.

7 0

3 years ago

in each diagram below, line A is parallel to line B. in which diagram does the alternate interior angle postulate justify angle

Firlakuza [10]

Answer:

Step-by-step explanation:

a

3 0

3 years ago

What is an equation in point-slope form for the line that passes through the points (4, -1) and

viktelen [127]

Answer:

y+1=-5/7(x-4)

Step-by-step explanation:

y-y1=m(x-x1)

m=(y2-y1)/(x2-x1)

m=(4-(-1))/(-3-4)

m=(4+1)/-7

m=5/-7

m=-5/7

y-(-1)=-5/7(x-4)

y+1=-5/7(x-4)

8 0

3 years ago