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Gekata [30.6K]
3 years ago
6

Estimate 29.14 x 5.2

Mathematics
1 answer:
aev [14]3 years ago
8 0

Answer:

About 151.500

Step-by-step explanation:

Actual answer is 151.528 Just go with mental math.

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at 10.5mph how long would it take to go 6776 miles and why? My lecture did't really touch over on this subject.
alexandr402 [8]
Speed = 10.5miles/ h
time= 6776miles / 10.5miles/h
= 645 hours
to find time from speed and distance,
use distance/speed
5 0
3 years ago
Given vectors u = (-3,2) and v = (4,-1), if vector w=2u -3v, what is ||w|| ?
Brums [2.3K]
\bf \begin{cases}
u=\ \textless \ -3,2\ \textgreater \ \\
2u=2\ \textless \ -3,2\ \textgreater \ \\
\qquad \ \textless \ 2\cdot -3,2\cdot 2\ \textgreater \ \\
\qquad \boxed{\ \textless \ -6,4\ \textgreater \ }\\
----------\\
v=\ \textless \ 4,-1\ \textgreater \ \\
3v=3\ \textless \ 4,-1\ \textgreater \ \\
\qquad \ \textless \ 3\cdot 4,3\cdot -1\ \textgreater \ \\
\qquad \boxed{\ \textless \ 12,-3\ \textgreater \ }
\end{cases}\qquad
\begin{array}{llll}
w=2u-3v\\\\
w=\ \textless \ -6,4\ \textgreater \ -\ \textless \ 12,-3\ \textgreater \ \\\\
w=\ \textless \ -6-12,4-(-3)\ \textgreater \ \\\\
w=\ \textless \ -18,4+3\ \textgreater \ \\\\
\boxed{w=\ \textless \ -18,7\ \textgreater \ }
\end{array}
\\\\\\
||w||\implies \sqrt{a^2+b^2}\implies ||w||=\sqrt{(-18)^2+(7)^2}\implies ||w||=373
7 0
3 years ago
-x-8+14x=-34 solve for x
Maksim231197 [3]

Answer:

X = -2

Step-by-step explanation:

-x - 8 + 14x = -34                                          

-x + 14x = -34 + 8

-x + 14x = -26

13x = -26

x = -26/13

x = -2


-(-2) - 8 + 14(-2) = -34

2 - 8 - 28 = -34

-34 = -34

8 0
4 years ago
Read 2 more answers
Help please now help dont be childish will banned ​
Gre4nikov [31]

Step-by-step explanation:

y=3*-2

y=-6

y=3*-1

y=-3

y=3*0

y=0

y=3*1

y=3

y=3*2

y=6

Hope this makes sense

7 0
3 years ago
A survey was conducted by an independent price checking company to check an advertiser's claim that it had lower prices than its
Mama L [17]

Answer:

a) critical values ≈ -3.182 and 3.182  shows that there is difference in average prices

b)   H0 : μd = 0

    Ha : μd ≠ 0

Step-by-step explanation:

<u>a) Determine if there is any significant difference in the average prices </u>

using ∝ = 0.05

and  μ( advertiser ) - μ ( competitor ) = μd

test statistic ( t ) =  -3.011

df = 3

hence the critical values ( two tailed test ) =  -3.182 and 3.182. this shows that there is sufficient evidence to show that there is difference in the average prices

<u>b) state the hypothesis</u>

 H0 : μd = 0 ( null )

Alternate hypothesis : Ha : μd ≠ 0

5 0
3 years ago
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