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abruzzese [7]
3 years ago
11

Can some give me the equations or tips on how to find them myself? (if you can't read it, or can't see the picture, message me)

Mathematics
1 answer:
Westkost [7]3 years ago
5 0
Okay i just pmed you, willing to help just can't see the picture at all that well
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Which symbol creates a true sentence when x equals 7?
Dmitrij [34]
It is C= >
because the value of x is 7
by putting the value of x
52 +(x-3)2=___=35
52+ (4)2=___=35
52+8=___=35
60=___=35
so 60 > 35
8 0
4 years ago
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A pilot can fly an airplane 2240 miles with the wind in the same time as she can fly 1920 miles against the wind. If the speed o
Artist 52 [7]
Recall your d = rt, distance = rate * time

so... hmm if the plane has a still air speed of say "r", when it's going with the wind, is not really going "r" fast, is going "r + 40 ", because the wind is adding 40mph to its speed, is really moving.

and when the plane is going against the wind, is not really going "r" fast either, is going " r - 40 ", because the wind is eroding speed from it.

now, it went 2240 miles for say "t" hours, and it did 1920 miles for the same length of time, "t" hours.

\bf \begin{array}{lccclll}
&distance&rate&time\\
&-----&-----&-----\\
\textit{with the wind}&2240&r+40&t\\
\textit{against the wind}&1920&r-40&t
\end{array}
\\\\\\
\begin{cases}
2240=(r+40)t\implies \frac{2240}{r+40}=\boxed{t}\\
1920=(r-40)t\\
----------\\
1920=(r-40)\left( \boxed{\frac{2240}{r+40}} \right)
\end{cases}
\\\\\\
1920=\cfrac{(r-40)2240}{r+40}\implies 1920(r+40)=(r-40)2240
\\\\\\
1920r+76800=2240r-89600\implies 166400=320r
\\\\\\
\cfrac{166400}{320}=r

and surely you know how much that is.
6 0
3 years ago
Sammy served food to a group at a restaurant. The total cost of the food was $62.00. The sales tax is 6% of the cost of food. Th
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-  Find 20% of 62:
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Add everything together:
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The total cost was $78.12

5 0
3 years ago
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The drama club at Central sells hot chocolate and coffee at the high school football games. At the last game, they had sales of
xxTIMURxx [149]

Answer:

I could be wrong but the coffee is 200 and the hot choclet is 266.666666667

Step-by-step explanation:

I used math and a calculator.

3 0
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Melanie sold half of her comic books and then bought 8 more. She now has 15.How many did she begin with
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