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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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Sebastian solved the radical equation y + 1 = but did not check his solution. (y + 1)2 = y2 + 2y + 1 = –2y – 3 y2 + 4y + 4 = 0 (
Softa [21]

Answer:

There are no true solutions to the equation.

Step-by-step explanation:

<u><em>The correct equation is</em></u>

y+1=\sqrt{-2y-3}

Solve for y

squared both sides

(y+1)^2=(-2y-3)

(y^2+2y+1)=(-2y-3)

y^2+2y+1+2y+3=0

y^2+4y+4=0

(y+2)(y+2)=0

y=-2

<em>Verify</em>

substitute the value of y in the original expression

-2+1=\sqrt{-2(-2)-3}

-1=1 ----> is not true

therefore

There are no true solutions to the equation.

4 0
3 years ago
Whats the y-axis reflection. of 4,-4
Karo-lina-s [1.5K]

Answer:

4,4

Step-by-step explanation:

its ask for the reflection, so -4 will be 4

5 0
2 years ago
[2647]A·[712813914]B=? help me!!!!!!!!!!!!!!!!!!!!!
Amanda [17]
Is this suppose to be an equation or is there something missing here?
3 0
3 years ago
Suppose cos(O) = 12/13, Quadrant I. Find sin(O).<br> A:13/12<br> B:5/13<br> C:13/5<br> D:5/12
noname [10]

Answer:

B: 5/13

Step-by-step explanation:

pythagoras theorem: a^2 + b^2 (sides) = c^2 (hypotenuse)

a^2 + 12^2 = 13^2

a^2 + 144 = 169

a^2 = 25

a = 5

sin = opp/hyp

sin 5/13

Hope this helps

7 0
2 years ago
Need help with this 3 = x+3 - 5x​
Elis [28]

Answer:

x=0 (No solution)

Hope this helps!

5 0
3 years ago
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