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2 years ago

8

Lin runs 5 miles in 40 minutes.

1 answer:

natima [27]2 years ago

3 0

8 mins
1 mile
1 hr and 12 mins

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I have NO idea how to do this to be honest.

vazorg [7]

(-5a)(-3a ²)
=
15a³

-5 x -3 = 15 ( negative times negative = positive)
a x a² = a³ ( when multiplying exponents, you add the exponents together )

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3 years ago

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The sum of the digits of a two-digit number is 6. when the digits are reversed, the number decreased by 18. find the original nu

poizon [28]

<span>2x + x = 12
=> x =12/3 =4
so, original number is 84.</span>

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3 years ago

Help me please on the one that’s blank please step also needed

Dafna1 [17]

I believe his net worth would be $21,310

if you add all of it together but subtract his debts that’s your answer i’m pretty sure. hope it helps!

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2 years ago

HELP ASSAP WITH THIS QUESTION 40 POINTS

zhuklara [117]

7x+2y=2

steps:
y+21=-7/2x(x-6)
y+21=-7/2x+21
y=-7/2x+21-21
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2(7/2x+y=0)
7x+2y=2

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3 years ago

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a boat on the Potomac River travels the same distance downstream in 2/3 hour as it does going upstream in 1 hour. If the speed o

lord [1]

$\bf \begin{array}{ccccllll}
&distance&rate&time(hrs)\\
&-----&-----&-----\\
upstream&d&r-3&\frac{2}{3}
\\\\
downstream&d&r+3&1
\end{array}\\\\
-----------------------------\\\\
thus\qquad 
\begin{cases}
d=(r-3)\frac{2}{3}
\\\\
d=(r+3)1
\end{cases}\qquad d=d\qquad thus
\\\\\\
(r-3)\cfrac{2}{3}=(r+3)1$

notice, the distance is the same, upstream or downstream, thus is "d" for both

solve for "r"

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3 years ago