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zhuklara [117]
2 years ago
5

WILL MARK BRAINLIEST 3x + 2(x - 4)= 20

Mathematics
2 answers:
laiz [17]2 years ago
8 0

Answer:

x = 5.6

Step-by-step explanation:

3x + 2(x - 4)= 20

3x + 2x - 8 = 20

5x - 8 = 20

    +8     +8

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

5x = 28

/5     /5

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

x = 5.6

Leno4ka [110]2 years ago
3 0

Answer:

x = 28/5

Step-by-step explanation:

Hope this helps, please give brainliest.

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shtirl [24]

Answer:

0.3cm ?

Step-by-step explanation:

3 0
3 years ago
If a car has tires with a diameter of 28 inches and is traveling at 55 mph, how fast are its tires spinning, in rpm^ prime s (re
Aleksandr-060686 [28]

Answer:

The tires are spinning at 660.49 revolutions per minute.

Step-by-step explanation:

The speed of the tires (v) is the same that the speed of the car, so to find the angular velocity of the tires we need to use the equation:

\omega = \frac{v}{r}

Where:

r: is the radius of the tires = d/2 = 28 inches/2 = 14 inches

\omega = \frac{55 mph}{14 inches*\frac{1 mile}{63360 inches}} = 2.49 \cdot 10^{5} \frac{rad}{h}*\frac{1 h}{60 min}*\frac{1 rev}{2\pi rad} = 660.49 rpm              

Therefore, the tires are spinning at 660.49 revolutions per minute.

   

I hope it helps you!          

5 0
3 years ago
The owner of a bike shop sells unicycle and bicycles and keeps inventory by counting seats and wheels. One day she counts 20 sea
Mashcka [7]
A unicycle has 1 wheel. u unicycles have u wheels.

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8 0
3 years ago
Read 2 more answers
Don't answer if you don't know
SIZIF [17.4K]
0.10d + 0.25q = 3.55
q = d + 3

0.10d + 0.25(d + 3) = 3.55
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0.35d = 2.80
d = 2.80/0.35
d = 8.....8 dimes

q = d + 3
q = 8 + 3
q = 11 <=== 11 quarters
3 0
3 years ago
There are (49)5 • 40 books at the library. What is the total number of books at the library? (4 points)
madreJ [45]
5 times 40 times 49 equals 9800 because you do 5 time 4 and that's 20 and you add a 0 and you multiply by 49 to get 9800.
5 0
3 years ago
Read 2 more answers
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