All categories

4 years ago

Solve each equation a+8=12

Mathematics

2 answers:

Mice21 [21]4 years ago

7 0

Answer:

A=4

Step-by-step explanation:

Since a+8=12

(Honestly i forgot what the method is called)

You do 12-8=a

A=4

-Hope this helps

-GoldenWolfX

docker41 [41]4 years ago

7 0

Answer:

a = 4

Step-by-step explanation:

1. First write out the problem

a+8= 12

2. Find the inverse operation. Then subtract on both sides.

a+8= 12

-8= -8

3. Cross out the 8 because they are zeros and bring down the "a". Then find the answer for the variable "a".

a+8= 12

-8= -8

a = 4

So, the variable a=4.

To check, we know that 4+8=12.

Hope this helps ☝️☝☝

You might be interested in

Please help differentiate this!!!!!!!!!

vlada-n [284]

$\bf h=20ln(3t+2)+30\\\\
-------------------------------\\\\
\boxed{a}\\\\
\stackrel{0~years}{t=0}\qquad h=20ln[3(0)+2]+30\implies h=20ln(2)+30
\\\\\\
h\approx 43.86
\\\\\\
\boxed{b}\\\\
\stackrel{1~meter}{h=100}\qquad 100=20ln(3t+2)+30\implies 70=20ln(3t+2)
\\\\\\
\cfrac{70}{20}=ln(3t+2)\implies \stackrel{\textit{log cancellation rule}}{e^{\frac{7}{2}}=e^{ln(3t+2)}}\implies e^{\frac{7}{2}}=3t+2
\\\\\\
e^{\frac{7}{2}}-2=3t\implies \cfrac{e^{\frac{7}{2}}-2}{3}=t\implies 10.371817\approx t$

$\bf \boxed{c}\\\\
\cfrac{dh}{dt}=20\left(\cfrac{1}{3t+2}\cdot 3 \right)+0\implies \cfrac{dh}{dt}=20\left(\cfrac{3}{3t+2} \right)\\\\\\ \cfrac{dh}{dt}=\cfrac{60}{3t+2}
\\\\\\
\left. \cfrac{dh}{dt} \right|_{3}\implies \cfrac{60}{3(3)+2}\implies \cfrac{60}{11}
\\\\\\
\left. \cfrac{dh}{dt} \right|_{10}\implies \cfrac{60}{3(10)+2}\implies \cfrac{15}{8}$

5 0

3 years ago

Read 2 more answers

Write an expression to represent: Eight minus the quotient of two and a number x

NARA [144]

8 - (2/x) = y (ignore these words the answer was too short lol)

8 0

3 years ago

Read 2 more answers

F(5)=3x+2 What is the solution

Nady [450]

Answer:

f=3/5x+2/5c

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Simplify: 9y + 2xy -2 -4y +4xy +2

vaieri [72.5K]

Equation simplified would be 5y+6xy

4 0

3 years ago

Read 2 more answers

The ubiquitous 12oz aluminum cans used to distribute drinks in this country have a diameter of approximately 2.75 inches and a h

gayaneshka [121]

Answer:

3.5%

Step-by-step explanation:

The volume of a cylinder = $\pi r^2h$

r = radius of cylinder,

h = height of cylinder

For the non-optimal can,

r = 2.75/2 = 1.375

h = 5.0

$V = \pi(1.375^2)\times 5.0 = 9.453125\pi$

For the optimal can,

d/h = 1,

d = h

2r = h

r = h/2

$V = \pi\left(\dfrac{h}{2}\right)^2\times h = \pi\left(\dfrac{h^3}{4}\right)$

They have the same volume.

$\pi\dfrac{h^3}{4} = 9.453125\pi$

$h^3 = 37.8125$

$h=3.36$ (This is the height of the optimal can)

$r = \dfrac{3.36}{2} = 1.68$ (This is the radius of the optimal can)

The area of a cylinder is

$A = 2\pi r(r+h)$

For the non-optimal can,

$A = 2\pi\times\dfrac{2.75}{2}\left(\dfrac{2.75}{2}+5.0\right) = 17.53125\pi$

For the optimal can,

$A = 2\pi\times1.68\left(1.68+3.36\right) = 16.9344\pi$

Amount of aluminum saved, as a percentage of the amount used to make the optimal cans = $\dfrac{17.53125\pi - 16.9344\pi}{16.9344\pi}\times 100\% = 3.5\%$

5 0

4 years ago