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Dvinal [7]
2 years ago
15

Roger went on a 3-day hike. He walked 5 3/4miles on the first day, 7 1/6miles on the second day and 4 7/8miles on the third day.

How many miles did he walk altogether?
A. 16 11/24miles
B. 17 3/8 miles
C. 17 3/4miles
D. 17 19/24 miles
Mathematics
2 answers:
aleksklad [387]2 years ago
8 0
5 3/4 + 7 1/6 + 4 7/8 
= 5 18/24 + 7 4/24 + 4 21/24
= 16 43/24
= 17 19/24

answer is D. 17 19/24 miles
trasher [3.6K]2 years ago
6 0
I'm not a 100% on this, but I believe it is D. 
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16x^4+32x^3+24x^2+8x+1

Step-by-step explanation:

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If 9 out of 10 doctors in a small city recommend afternoon naps, and there are 8 doctors in the city who don’t recommend naps, h
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Which statements are true about exponential decay functions? Check all that apply. The domain is all real numbers. As the input
lorasvet [3.4K]
<h2>Answer:</h2>

The correct options are:

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<h2>Step-by-step explanation:</h2>

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                f(x)=ab^x

where a>0 and b are constants.

Also, it represents a growth function if b>1

and a decay function if 0<b<1

where b is the base.

  • x belongs to whole of the real numbers( since the exponential function is well defined for all the real values of x.

Hence, the domain of the function is all the real numbers )

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8 0
3 years ago
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For the quadratic relation y = -3x2 - 7x + 8,
Varvara68 [4.7K]

Answer:

a) y-int is at (0, 8)

b) zeros are at (0.8, 0) and (-3.2, 0); after having rounded to the nearest tenth.

Step-by-step explanation:

Given that y = -3x² - 7x + 8

we can find our y-intercept by setting x = 0

y = -3 (0)² - 7 (0) + 8

y = 8

so, our y intercept is at (8, 0)

To find our zeros, or x-intercepts, we need to set y = 0

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Let's use the quadratic formula

x = (-b ± √(b² - 4 (a  * c))) / 2a

where, in this case

a = -3

b = -7

c = 8

x = (7 ± √((-7)² - 4 (-3 * 8))) / (2 * -3)

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x = (7 ± √145) / -6

using the addition pathway

x = (7 + √145) / -6

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using the subtraction pathway

x = (7 - √145) / -6

x = -0.8


So, our x-intercepts, or zeros, will lie on the points

(0.8, 0) and (-3.2, 0)


Create a table of x and y values using the given equation, and plot and graph. Clearly label your y and x intercepts.

(x, y)

(-3, 2)

(-2, 10)

(-1, 12)

(0, 8)

(1, -2)

(2, -18)

(3, -40)

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3 years ago
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