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OverLord2011 [107]
3 years ago
13

Five times my age 4 years ago is the same as 3 times my age in 2 years." How old is Elmo now?

Mathematics
2 answers:
horrorfan [7]3 years ago
8 0
Elmo is 3 years old.
zheka24 [161]3 years ago
7 0

Answer:

elmo is 3 right now

Step-by-step explanation:

5x -4 = 3x+2

2x= 6

x= 3

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What two numbers add to 9 and multiply to -70
Alborosie
X, y - the numbers

The numbers add to 9 and multiply to -70.
x+y=9 \\
xy=-70 \\ \\
y=9-x \\
xy=-70 \\ \\
\hbox{substitute 9-x for y in the second equation:} \\
x(9-x)=-70 \\
9x-x^2=-70 \\
-x^2+9x+70=0 \\
-x^2+14x-5x+70=0 \\
-x(x-14)-5(x-14)=0 \\
(-x-5)(x-14)=0 \\
-x-5=0 \ \lor \ x-14=0 \\
x=-5 \ \lor \ x=14 \\ \\
y=9-x \\
y=9-(-5) \ \lor \ y=9-14 \\
y=14 \ \lor \ y=-5 \\ \\
(x,y)=(-5,14) \hbox{ or } (x,y)=(14,-5)

The numbers are -5 and 14.
4 0
3 years ago
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For the triangle above, find sin A. a. 36° c. 0.9323 b. 50° d. 0.385
Lerok [7]
The picture in the attached figure

we know that
in the right triangle ABC
sin A=opposite side angle A/hypotenuse

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so
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the answer is
the option <span>d. 0.385</span>

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