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lara [203]
3 years ago
13

A number is 6 greater than 1/2 another number. If the sum of the numbers is 21, find the numbers

Mathematics
1 answer:
Anna71 [15]3 years ago
6 0

Answer:

x=11, y=10

Step-by-step explanation:

x= 6+ (1/2)y

x+y=21

substitute the first equation into the second equation:

(6+ (1/2y)) + y =21

to get:

y=10

then to find x:

x+ 10 = 21

x=11

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VashaNatasha [74]
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  3. of the equation 1 you must obtain the value of x, 4x = 21.60+4y ⇒x=21.60/4+4y/4⇒x= 5.4+y
  4. now with the value of x , it is substitute in the equation 2)   11(5.4+y) + 6y = 40.29 , ⇒ 59.4 + 11y + 6y = 40.29 ⇒  17y = 40.29-59.4⇒ y = -19,11/7⇒ y = -2.73
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6 0
3 years ago
What is the slope of the line represented by the equation y = 1/5x-3?
Romashka-Z-Leto [24]

Answer:

1/5

Step-by-step explanation:

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m=1/5, so the slope is 1/5

7 0
3 years ago
Find the exact value by using a half-angle identity. . cos(5π/12).
vodka [1.7K]
<span>First of all in order to find the exact value by using a half angle identity we will do
cos(5π divided by 12)

=cos (5π divided by 6) divided by 2
= ± Under root[(1+cos (5π divided by 6) divided by 2]
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so the solution is [(1- Under root 3 divided by 2) divided by 2] 
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I hope it helped.</span>
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What is the completely factored form of x3-64?
nataly862011 [7]
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</span><span>so
x^3 - 4^3 = (x - 4)(x^2 + 4x + 16)

hope it helps</span>
7 0
2 years ago
Read 2 more answers
F (n) = 65 - 100n<br> f (39) =
yan [13]

f(39)=65-100(39)

65-3900

= -3835

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