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Inessa [10]
3 years ago
10

Which expression is the sum of

Mathematics
1 answer:
arlik [135]3 years ago
6 0

Answer:

b

Step-by-step explanation:

its b because you add the 3.4n +2.5n then you subtract -5.3+2.8

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He roots of x2 − (<br> ) + 34 are 5 ± 3i.
GrogVix [38]
Use the quadratic formula, x=\frac{-b+ \sqrt{ b^{2}-4ac} }{2a}
(don't know how to type the "-"sign in the formula, so there is only the "+" in the formula)
in this case, a=1, c=34, b is unknown
from the roots, we can tell that -b+\sqrt{b^{2}-4ac } =2(5+3i)=10+6i

Note: the original equation already give b as -b, so -(-b)=10, b=10
using b^2-4ac=(6I)^2,
b^2-4*34=-36
b^2=100
you will also get b=10
5 0
3 years ago
Please help, I have redone this problem a million times and i cant get it right. Time sensitive!!
Advocard [28]

Answer:

D

Step-by-step explanation:

This should be easy one unless you're making silly mistake like forgetting to take reciprocal of \frac{3}{2x}

lets do it:

\frac{x+2}{x-1} ÷ \frac{3}{2x} first: we take the reciprocal of 3/2x now its

\frac{x+2}{x-1} * \frac{2x}{3} now just multiply top and bottom by using distributive method

\frac{2x^2 +4x}{3x-3} this is your answer.

3 0
3 years ago
Charlotte has an aquarium in the shape of a rectangular prism. it is 3/4 of a foot high/ 2 and 1/2 feet long, and 1 and 1/4 feet
Anuta_ua [19.1K]
V=xyz

V=0.75(2.5)1.25

V=2.34375 ft^3  or if you want the fraction..

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3 0
3 years ago
plz help me fast Thomas goes out to eat at a restaurant and orders fajitas for $12.95 and orders a soft drink for $1.50. Tax is
Ray Of Light [21]

Answer:

$18.55

Step-by-step explanation:

I added the meal and drink then used a calculator and addded that total plus 7% of it then I added 20% of that to get 18.55

12.95+1.50 = x

x + 7% = y

y+ 20%

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3 years ago
Solve unit rate problems- what name should be in the correct blank spot?
sleet_krkn [62]
So to do this all u have to do is find their WPM (words per minute). Just simply take their number of words and divide by their minutes.
Carl types 54 WPM
Max types 52 WPM
Jason types 59 WPM
So the answer is Max-Carl-Jason
Hope this helped
8 0
3 years ago
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