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Sedbober [7]
3 years ago
6

A plane flies from San Francisco to New York City at 600 miles per hour and returns along the same route at 400 miles per hour.

What is the average flying speed for the entire route (in miles per hour)
Mathematics
1 answer:
ozzi3 years ago
8 0

Answer: 500 i think

Step-by-step explanation:

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4x-5y+2z=-3<br> 6x+4y+9z=8<br> 11x-2y-z=7
Nutka1998 [239]

Answer:

thank you i need that

Step-by-step explanation:

4 0
3 years ago
Round 47.219 to the nearest tenth.​
saveliy_v [14]

Answer:

47.2

Step-by-step explanation:

7 0
2 years ago
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Please help!! ill give BRAINLIEST!!!
Alex787 [66]

1. Similar: all angles are equivalent.

2. Similar: 2 angles and 1 side are equivalent.

3. Not enough information.

4. Not enough information.

5. Not enough information.

6. False.

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6 0
3 years ago
What is the focus of the parabola?<br><br> y=−14x2−2x−2
nataly862011 [7]
First, we need to transform the equation into its standard form (x - h)²=4p(y - k).
Using completing the square method:

y = -14x² - 2x - 2
y = -14(x² + 2x/14) - 2
y = -14(x² + 2x/14 + (2/28)²) -2 + (2/28)²
y = -14(x + 1/14)² - 391/196
-1/14(y + 391/196) = (x + 1/14)²

This is a vertical parabola and its focus <span>(h, k + p) is (-1/14, -391/196 + 1/56) = (-1/14, -775/392).

Or (-0.071,-1.977).</span>
3 0
3 years ago
Solve the system:<br> 5x-7y=-41<br> -3x-5y=-3
-Dominant- [34]

Answer:

x = -4 , y = 3

Step-by-step explanation:

5x - 7y = -41 ... (i)

-3x - 5y = -3 ... (ii)

Multiplying (i) by -3 and (ii) by 5 ;

-15x + 21y = 123 ... (i)

-15x - 25y = -15 ... (ii)

Subtracting (i) by (ii) ;

0 + 46y = 138

46y = 138

y = 138 ÷ 46 = 3

Returning to equation (ii) ;

-3x - 5(3) = -3

-3x = -3 + 15

-3x = 12

x = -4

8 0
3 years ago
Read 2 more answers
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