Please help I will give brainly

Mathematics

2 answers:

Natalija [7]3 years ago

6 0

Answer: 7

Step-by-step explanation:

In the end if his cards are doubled to 20 then 20 / 2 = 10 and if his friend gave him 3 more cards then you would subtract 3 from 10 then that would = 7

Aleks04 [339]3 years ago

5 0

ok so the easy way is this

Marc says he will have 20 if he doubles his cards.

if u divide 20 by 2 = 10

but His friend gave him 3 cards before.which means that

10-3 = 7

He started with 7 cards

I answered b and c.

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2. The volume of a cylinder varies jointly with its height and the square of the radius. A 7.85 cubic inch spice container is 2.

Natali [406]

Answer:

Volume=21.195 cubic inch

Step-by-step explanation:

The volume of a cylinder varies jointly with its height and the square of the radius is expressed as

V∝hr^2

Introducing our constant of proportionality,K we have that

V =Khr^2

Given that A 7.85 cubic inch spice container is 2.5 inches tall and has a radius of 1 inch. We have that

V =Khr^2

7.85=K 2.5 X 1^2

K=7.85/2.5 x1

K=3.14

Given that another spice container is 3 inches tall with a radius of 1.5 inches, Volume=?

V =Khr^2

V=3.14 X 3 X 1.5^2

V=21.195 cubic inch

6 0

3 years ago

What is14/3 simplflied

irina [24]

14/3 simplified is 4 and 2/3 because 3 goes into 14 a total of 4 times with remainder 2. Therefore, 14/3 simplified is 4 and 2/3 or 4 2/3.

5 0

3 years ago

Write as a single fraction in its simplest form.

yaroslaw [1]

$\dfrac{4}{3x-5} + \dfrac{x+2}{x-1}\\\\\\=\dfrac{4(x-1) + (x+2)(3x-5)}{(3x-5)(x-1)}\\\\\\=\dfrac{4x-4 + 3x^2 -5x +6x -10}{(3x-5)(x-1)}\\\\\\=\dfrac{3x^2 +5x-14}{(3x-5)(x-1)}$