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skad [1K]
2 years ago
10

PLEASE HELP

Mathematics
1 answer:
ale4655 [162]2 years ago
7 0

y =  - 3x^{2}  + 18x + 10 \\  \frac{d}{dx}( - 3x^{2}  + 18x + 10) \\  - 6x + 18 = 0 \\  - 6x =  - 18 \\ x = 3

The axis of symmetry for parabola is x = 3.

Using derivative to solve for axis od symmetry is easier.

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Salsk061 [2.6K]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
Brian invests £4900 into his bank account.
True [87]

Answer:

  • £5200.68

Step-by-step explanation:

<u>Given:</u>

  • Investment P = £4900
  • Interest rate r = 1.5% or r = 0.015
  • Time t = 4 years
  • Number of compounds per year n = 1

<u>Find the future amount:</u>

  • F = P*(1+r/n)^{nt}\\
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6 0
2 years ago
Read 2 more answers
Help! the file is attached
Natalija [7]

Answer:

  • 924/5 ft/s
  • 369.6 ft

Step-by-step explanation:

126 mi/h = (126 mi)/(1 h)·(5280 ft)/(1 mi)·(1 h)/(3600 s) = (126·5280/3600) ft/s

126 mi/h = 184.8 ft/s = 924/5 ft/s

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In 2 seconds, the parachutist falls ...

  (184.8 ft/s)·(2 s) = 369.6 ft

4 0
2 years ago
use the slope formula to calculate the slope of the line that contains the two points (-4,0) and (5,2)​
Solnce55 [7]

Answer:

\frac{2}{9} x

Step-by-step explanation:

To find slope using two points you need to find the difference in x and y. You use \frac{y_{2}-y_{1}}{x_{2}-x_{1} }

So, 2-0=2 and 5-(-4)=9. Therefore the slope is 2/9x

3 0
3 years ago
Help with my homework. Please.
garik1379 [7]

Answer:

Step-by-step explanation: since average speed = total distance/time

a)average speed of the journey from my home town to A = 10 miles/20 minutes = 0.5

b)journey from my home town to B = 20 miles/30 minutes = 0.7

c)10 miles + 20 miles = 30 miles

which takes 50 minutes

so: 30 miles/50 minutes = 0.6

5 0
2 years ago
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