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ArbitrLikvidat [17]
3 years ago
5

Find the value of x (help quick)

Mathematics
1 answer:
o-na [289]3 years ago
6 0

Answer:

c) 3

Step-by-step explanation:

22=2x2 +4

22-4

18=2x2

18/2

9=x2

x=3

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The diameter of a wheel of a car is 30cm. If the car travels at an average speed of 13.2m/s, find the number of revolutions made
Marysya12 [62]

Answer:

Approximately 50420 revolutions (rounded to the nearest whole number.)

Step-by-step explanation:

Convert the diameter of this wheel to meters: d = 30\; \rm cm = 0.30\; \rm m.

Circumference of this wheel:

\pi \, d = \pi \times 0.30\; \rm m \approx 0.942\; \rm m.

Distance travelled in one hour:

\begin{aligned}v \cdot t &= 13.2 \; \rm m \cdot s^{-1} \times 3600\; \rm s \\ &= 47520\; \rm m\end{aligned}.

Number of revolutions required for covering that distance:

\displaystyle \frac{47520\; \rm m}{(\pi \times 0.30\; \rm m)} \approx 50420.

3 0
3 years ago
I Need the answer for these 3
11111nata11111 [884]

Here you go enjoy

Have a good rest of your night

5 0
2 years ago
What is the answer so pwease help
bezimeni [28]
U see I would help but just because u said “pwease” I’m not :)
4 0
3 years ago
Basic help :(<br> its math
elena-14-01-66 [18.8K]

Answer:

the slope or rate of change is 8 over 6 or 4 over 3 4/3

7 0
2 years ago
Idk sooo please help
borishaifa [10]

Answer:

20 points

Step-by-step explanation:

Points:

  • 21, 13, 14 and x for the last game

Average:

  • (21+13+14+x) / 4 = 17
  • 48 + x = 4*17
  • 48 + x = 68
  • x = 68 - 48
  • x = 20

They must score 20 points

6 0
3 years ago
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