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4 years ago

8

Perimeter area how does it work

2 answers:

Alchen [17]4 years ago

7 0

Add all the sides together

-BARSIC- [3]4 years ago

4 0

Perimeter= adding all sides together

Area= base x height

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can you help me solve the equation: 5m+3=18

shtirl [24]

$5m+3=18\ \ \ \ \ |subtract\ 3\ from\ both\ sides\\\\5m=15\ \ \ \ \ \ \ |divide\ both\ sides\ by\ 5\\\\\boxed{m=3}$

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4 years ago

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Find the unit rate. 21 3/4 meters in 2 1/2 hours

anyanavicka [17]

(21 3/4) / (2 1/2) =
(87/4) / (5/2) =
87/4 * 2/5 =
174/20 reduces to 8 7/10 (or 8.7)meters per hr

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4 years ago

2 cups = 1 pint 2 pints = 1 quart 4 quarts = 1 gallon<br> How many quarts are equal to 8 cups?

Margarita [4]

I think it’s 4 quarry’s

7 0

3 years ago

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How to put this in an algebraic expression

likoan [24]

8%w-16%z
I think that this is the answer.

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4 years ago

Find all values of c such that c/(c - 5) = 4/(c - 4). If you find more than one solution, then list the solutions you find separ

Deffense [45]

Answer:

$\large\boxed{\bold{NO\ REAL\ SOLUTIONS}}\\\boxed{x=4-2i,\ x=4+2i}$

Step-by-step explanation:

$Domain:\\c-4\neq0\ \wedge\ c-5\neq0\Rightarrow c\neq4\ \wedge\ c\neq5\\\\\dfrac{c}{c-5}=\dfrac{4}{c-4}\qquad\text{cross multiply}\\\\c(c-4)=4(c-5)\qquad\text{use the distributive property}\\\\c^2-4c=4c-20\qquad\text{subtract}\ 4c\ \text{from both sides}\\\\c^2-8c=-20\qquad\text{add 20 to both sides}\\\\c^2-8c+20=0\qquad\text{use the quadratic formula}$

$\text{for}\ ax^2+bx+c=0\\\\\text{if}\ b^2-4ac0,\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

$x^2-8x+20=0\\\\a=1,\ b=-8,\ c=20\\\\b^2-4ac=(-8)^2-4(1)(20)=64-80=-16$

$\text{In the set of complex numbers:}\\\\i=\sqrt{-1}\\\\\text{therefore}\ \sqrt{b^2-4ac}=\sqrt{-16}=\sqrt{(16)(-1)}=\sqrt{16}\cdot\sqrt{-1}=4i\\\\x=\dfrac{-(-8)\pm4i}{2(1)}=\dfrac{8\pm4i}{2}=\dfrac{8}{2}\pm\dfrac{4i}{2}=4\pm2i$

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3 years ago

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