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Airida [17]
3 years ago
13

Choose the product as a base with an exponent

Mathematics
1 answer:
iren2701 [21]3 years ago
8 0
I’m not sure why I don’t feel good at this time I just want you in my head I don’t want you in my
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A northbound train and a southbound train meet each other on parallel tracks heading in opposite directions. The northbound trai
Ksju [112]
Recall your d = rt, distance = rate * time.

if, the southbound train is going at a speed of say " r " mph, since we know that the northbound one is going faster by 4 miles, than is really going at " r + 4 " mph then.

now, we know in 2.5 hours, they're 330 miles from each other, thus the southbound train has been rolling for 2.5 hours, and the northbound train has also been rolling for 2.5 hours.

if the northbound train has covered on those 2.5 hours say " d " miles, then the southbound train has covered the slack, or " 330 - d ".

\bf \begin{array}{lccclll}
&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{t}\\
&------&------&------\\
Northbound&d&r+4&2.5\\
Southbound&330-d&r&2.5
\end{array}
\\\\\\
\begin{cases}
\boxed{d}=2.5(r+4)\\
330-d=2.5r\\
----------\\
330-\boxed{2.5(r+4)}=2.5r
\end{cases}
\\\\\\
330-2.5r-10=2.5r\implies 320=5r\implies \cfrac{320}{5}=r\implies 64=r

how fast is the northbound going?  well, r + 4.
7 0
3 years ago
For which system of equations is (-2,2)
nikklg [1K]

Answer:

A

Step-by-step explanation:

4 0
2 years ago
1. 3x + 6y = 3 and 7x + 3y = 7<br>ons for bo​
sweet-ann [11.9K]

Answer:

(1,0)

Step-by-step explanation:

3x + 6y = 3

7x + 3y = 7

Multiply the second equation by -2

-2( 7x + 3y = 7)

-14x -6y = -14

Add this to the first equation to eliminate y

3x + 6y = 3

-14x -6y = -14

--------------------

-11 x = -11

Divide by -11

x = 1

Now find y

3x + 6y = 3

3 +6y = 3

Subtract 3 from each side

6y = 0

y =0

3 0
3 years ago
Read 2 more answers
Select all of the names of this polygon.
Shalnov [3]
Trapezoid
quadrilateral
rhombus
parallelogram
8 0
3 years ago
Change 3/8 in to decimal show working​
mixas84 [53]

Answer:

0.375

Step-by-step explanation:

Convert the fraction to a decimal by dividing the numerator by the denominator.

3/8 = 0.375

7 0
2 years ago
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