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4 years ago

I need help on this what's the answer for it 2/7 + 2/3 =

Mathematics

2 answers:

Allushta [10]4 years ago

4 0

Your answer will be 20/21. (:

slava [35]4 years ago

3 0

20/21 is the answer to your problem.

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Because of heavy traffic, a bus took 30 minutes to cover a distance of 20 city blocks. How many minutes per city block did the b

aev [14]

a bus took 30 minutes-------------------------- to cover a distance of 20 city blocks

X minutes------------------------------------------------one (1) city block

I apply a rule of three

X=(1)*(30)/20=1.5

Therefore

the bus moved 1.5 minutes/block city

 

7 0

4 years ago

Danni counted 48 apples in a basket of apples. The basket actually contained 46 apples. What is the percent error?

enot [183]

The answer would be 4.2%

5 0

3 years ago

Find an expression that is equivalent to 1 - 1/3 + 1/5 . Use denominator of 15 . plz help

love history [14]

1 - 5/15 + 3/15
Just use common denominators!
Hope that helped. :)

3 0

3 years ago

Work out the volume of the shape

pashok25 [27]

Answer:

$\large\boxed{V=\dfrac{1,421\pi}{3}\ cm^3}$

Step-by-step explanation:

We have the cone and the half-sphere.

The formula of a volume of a cone:

$V_c=\dfrac{1}{3}\pi r^2H$

r - radius

H - height

We have r = 7cm and H = (22-7)cm=15cm. Substitute:

$V_c=\dfrac{1}{3}\pi(7^2)(15)=\dfrac{1}{3}\pi(49)(15)=\dfrac{735\pi}{3}\ cm^3$

The formula of a volume of a sphere:

$V_s=\dfrac{4}{3}\pi R^3$

R - radius

Therefore the formula of a volume of a half-sphere:

$V_{hs}=\dfrac{1}{2}\cdot\dfrac{4}{3}\pi R^3=\dfrac{2}{3}\pi R^3$

We have R = 7cm. Substitute:

$V_{hs}=\dfrac{2}{3}\pi(7^3)=\dfrac{2}{3}\pi(343)=\dfrac{686\pi}{3}\ cm^3$

The volume of the given shape:

$V=V_c+V_{hs}$

Substitute:

$V=\dfrac{735\pi}{3}+\dfrac{686\pi}{3}=\dfrac{1,421\pi}{3}\ cm^3$

7 0

3 years ago

What is the area of the parallelogram? 6 5 4

tiny-mole [99]

Step-by-step explanation:

A=base length × height

if base is 6cm, and h 4 cm, multiply

6×4=24cm2

5 0

3 years ago