All categories

3 years ago

1) Find the value of x. RKN = 640 a) 7 c) 9 b) 8 d) 32 ???? ASAP

Mathematics

1 answer:

Airida [17]3 years ago

7 0

Answer:

c) 9

Step-by-step explanation:

4x - 2 + 30 = 64

4x + 28 = 64

4x = 64 - 28

4x = 36

x = 36/4

x = 9

You might be interested in

Select the student who reads the fastest (greatest number of words per minute)

lesya [120]

Help meee with my math

5 0

2 years ago

A couch that regularly costs 975 is on sale for 390 what is the percent markdown

nirvana33 [79]

85% will be correct i feel like

3 0

2 years ago

WILL GIVE BRAINLIEST!

kvasek [131]

1.D, both.
not sure of the other though

6 0

2 years ago

Read 2 more answers

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

2 years ago

If it is sunday when you cross the international date line while traveling westward, the next day is

mixas84 [53]

You cross the date line into Monday.

_____
The next day after Monday is Tuesday. (I find it difficult to tell the intent of the question.)

3 0

2 years ago