3 years ago

3(-5+2x) =21, 15 + 2x=21 is this distributed right?

Mathematics

1 answer:

hjlf3 years ago

3 0

Answer:

Step-by-step explanation:

3(-5+2x)=21

-15+6x=21 -5*3 is -15

6x=36

x=6

You might be interested in

What is d if <img src="https://tex.z-dn.net/?f=%5Cfrac%7B3d-2%7D%7B8%7D%20%3D%20-d%2B16%5Cfrac%7B1%7D%7B4%7D" id="TexFormula1" t

Harlamova29_29 [7]

Answer: d=12

Step-by-step explanation:

$\displaystyle\\\frac{3d-2}{8} =-d+16\frac{1}{4} \\\\\frac{3d-2}{8} =-d+\frac{16*4+1}{4} \\\\\frac{3d-2}{8} =-d+\frac{64+1}{4} \\\\\frac{3d-2}{8} =-d+\frac{65}{4}$

Multiply both parts of the equation by 8:

$\displaystyle\\3d-2=(-d+\frac{65}{4} )(8)\\\\3d-2=-8d+65*2\\\\3d-2=-8d+130\\\\3d-2+2=-8d+130+2\\\\3d=-8d+132\\\\3d+8d=-8d+132+8d\\\\11d=132\\$

Divide both parts of the equation by 11:

$d=12$

8 0

1 year ago

Please help me with this

Masja [62]

Answer:

c = a - 16

Step-by-step explanation:

Given

a = b + 12 ( subtract 12 from both sides )

a - 12 = b

Substitute b = a - 12 into b = c + 4

a - 12 = c + 4 ( add 12 to both sides )

a = c + 16 ( subtract 16 from both sides )

c = a - 16

5 0

2 years ago

For f(x) = 3x + 1 and g(x) = x2 - 6, find (f+ g)(x).

kirza4 [7]

Answer:

Step-by-step explanation:

(f+g)(x)=f(x)+g(x)

3x+1+x2-6 = x2+3x-5

5 0

3 years ago

What is the volume of a cylinder with base radius 2 and height 9?

astraxan [27]

113.04 is the volume

V = pi x r^2 x h

3.14 x 2^2 x 9 = 113.04

8 0

3 years ago

How does knowing 8+5=13 help you solve 13-5?

amid [387]

Answer:

Fact Families

Step-by-step explanation:

They are fact families

8 0

3 years ago

Read 2 more answers