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Alexandra [31]
3 years ago
5

$20 haircut; 10% tip

Mathematics
1 answer:
arlik [135]3 years ago
8 0

Answer:

I think the answer is $22.00

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Use the Intermediate Value Theorem to show that the polynomial f(x)=x^3+x^2-2x+5 has a real zero between -3 and -1.
Triss [41]

You need to note first two things.

1. The function f(x) need to be a continuous function on [-3,-1] (indeed f(x) is a polynomial function, is continuous on every real number x)

2. Take the closed interval [-3,-1]

Now, evaluate f(-3) and f(-1).

f(-3) = (-3)^3 + (-3)^2 -2(-3) + 5 = -27 + 9 +6 + 5 = -7 < 0\\f(-1) = (-1)^3 + (-1)^2 -2 (-1) + 5 = -1 + 1 +2 + 5 = 7 >0

So, we have f(-3) < 0  and f(-1). So,  f(-3) < 0 < f(-1), then by the Intermediate Value Theorem, there exist c \in (-3,-1) such that f(c) = 0.

6 0
3 years ago
© Solve the simultaneous equations<br> -3x + y= – 8<br> 3x + 2y = – 13<br> X =?<br> y =?
DENIUS [597]

Answer:

x=1/3

y=-7

Step-by-step explanation:

using the elimination method, you can add both equations vertically, to eliminate the x

-3x+y=-8

3x+2y=-13

3y=-21

y=-7

we then fix the value of y into the first equation

-3x+y=-8

-3x-7=-8

-3x=-8+7

-3x=-1

x=1/3

5 0
3 years ago
A student reads 65 pages per hour proportional relationship
goldfiish [28.3K]
Oh.......kay.... Is that a question? It doesn't look like one.
3 0
3 years ago
Give the name (monomial, binomial,
Semenov [28]
Cubic trinomial is the correct answer
4 0
3 years ago
Read 2 more answers
Please Help! Look at Screenshot for question.
iogann1982 [59]

Answer:

C

Step-by-step explanation:

A modified box plot does not include the outliers in the whiskers, instead they are points outside of the whiskers

5,25,33,34,34,37,37,40,42,45,45,46,46,49,73

This data has 2 outliers 5 and 73 so we have 2 choices for a modified box plot D or D

The lowest value outside of the outliers is 25 , so C would be the logical choice

D has the lower end of the whisker too close to the outlier

3 0
3 years ago
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