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Sindrei [870]
3 years ago
6

Jen traveled a distance of 170 miles in 2 hours and 45 min. Express her speed, in miles per hour to the nearest tenth

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0

Jen is going around 85mph


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Simplify: − (sq root)16x2 if x<0.
Sever21 [200]

Step-by-step explanation:

-  \sqrt{16 {x}^{2} }  \\  =  - 4x

5 0
3 years ago
the drill must go 3/8 of the way through the sheet the sheet is 2.5 cm thick how deep should the drill be set
andrey2020 [161]

Answer:

15/16 cm

Step-by-step explanation:

The drill must go 3/8 of the way from one side of the sheet to the other.  The depth that this drill must reach is found by multiplying 2.5 cm by 3/8:

25       3       5         3

----- * ----- = ------ * ------ = 15/16 cm

10       8        2        8

7 0
4 years ago
Find the standard form of the equation of the parabola with a vertex at the origin and a focus at (0, -7).
creativ13 [48]
So hmm check the picture below

we know the vertex is at the origin, and the focus point is below it, that means two things, the parabola is vertical and it's opening downwards

notice the distance "p", from the vertex to the focus point, is just 7 units, however, since the parabola is opening downwards, the "p" value will be negative, so p = -7

\bf \textit{parabola vertex form with focus point distance}\\\\
\begin{array}{llll}
(y-{{ k}})^2=4{{ p}}(x-{{ h}}) \\\\
\boxed{4{{ p}}(y-{{ k}})=(x-{{ h}})^2 }\\
\end{array}
\qquad 
\begin{array}{llll}
vertex\ ({{ h}},{{ k}})\\\\
{{ p}}=\textit{distance from vertex to }\\
\qquad \textit{ focus or directrix}
\end{array}\\\\
-------------------------------\\\\
4{{ p}}(y-{{ k}})=(x-{{ h}})^2\quad 
\begin{cases}
h=0\\
k=0\\
p=-7
\end{cases}\implies 4(-7)(y-0)=(x-0)^2
\\\\\\
-28y=x^2\implies y=-\cfrac{1}{28}x^2

8 0
3 years ago
Solve for the following variables
fgiga [73]

Answer: not 100 percent sure but i think x=37 z=110 y=33

Step-by-step explanation:

8 0
4 years ago
Given that f(x) = 2x + 1 and g(x) = −5x + 2, solve for f(g(x)) when x = 3.
Anon25 [30]
The first step in solving for f(g(x)) when x=3, is solve for g(x). The answer of g(x) when x is equal to 3 is -(5) multiplied by 3 add by 2. Therefore, g(x) is -13. Then substitute the value of g(x) to f(x). The answer of f(-13) is 2 multiplied by -13, then add 1. So, the final answer is, f(x)=-25.
3 0
3 years ago
Read 2 more answers
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