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4 years ago

How do you find this out

Mathematics

1 answer:

andrew-mc [135]4 years ago

8 0

A. 13/15
b. 5/8
c. 4 11/12
d. 3 3/5

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Original cost minus the 10% discount

Dmitrij [34]

Hi! I will try my best to answer your question, the wording provided is unclear.

If the 10% of the original cost of something is $1.50, then the total cost is $15.00.

Assuming this is the discounted price, which would be 90% of the original cost, the original cost would be $16.67.

8 0

4 years ago

What is 27 divided by 10^-5

Ahat [919]

10^-5 = 0.00001

27 divided by 0.0001=2700000

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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:

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

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

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

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

6 0

3 years ago

Read 2 more answers

PLEASE HELP WILL GIVE BRAINLIESTT

frez [133]

Answer:

<u></u>

<u>the answer is 5/8</u>

Step-by-step explanation:

5 x 7/ 14 x 4

=35/ 56

=5/8

6 0

4 years ago

Plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz help mee

HACTEHA [7]

Answer:

the first one

Step-by-step explanation:

7*1=7 and 7*3=21

6 0

2 years ago