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Andreas93 [3]
3 years ago
14

Answer plzz i really really really need help

Mathematics
1 answer:
IgorC [24]3 years ago
5 0

Answer:

A,D,E, and F

Step-by-step explanation:

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9. 3x + 9y = 18<br> y = x + 2<br> Substitution method
777dan777 [17]

Answer:

x = 0

y = 2

Step-by-step explanation:

3x + 9y = 18 ---------eqn 1

y = x + 2---------eqn 2

Substitute eqn 2 into eqn 1, for the value of y

3x + 9( x + 2) = 18

3x + 9x + 18 = 18

12x + 18 = 18

12x = 18 -18

12x = 0

Divide both sides by 12 , to get the value of x.

12x/ 12 = 0/12

x = 0

Substitute x = 0 into eqn 2

y = x + 2

y = 0 +2

y = 2

Hint: to confirm the values

x = 0

y = 2

Let's take eqn 1 ,

3x + 9y = 18

3(0) + 9(2)

= 0 + 18

= 18

Correct

Let's take eqn 2

y = x + 2

Let's find y

y = 0 + 2

y = 2

Correct too

4 0
3 years ago
Jacob and his team start at the 45 yard line but they get a flag and have to go back 15 yards. The next play Jacob ran the ball
Zielflug [23.3K]
45 plus 15 is 60 so he ran 12 yards so subtract 12 from 60 and your answer is 48
8 0
3 years ago
By how much does 5 exceed -4?<br>(a) 1<br>(b)-1<br>(c) 9<br>(d) -9​
Elden [556K]

Answer:

C

Step-by-step explanation:

-4+9=5

6 0
3 years ago
Which of the following shows how the distributive property can be used to find -22(1.5)?
vampirchik [111]

Answer:

the last one

Step-by-step explanation:

4 0
3 years ago
Claire is looking at the equation of a conic section where A=1, B=0, C=0. Which type of conic section is represented by the equa
Kitty [74]
The general equation of second degree is
                             Ax²+By²+Gx+Fy+C=0 ------1

Now the given conditions are 
A=1, B=0, C=0
Now,
putting in eq. 1
x²+Gx+Fy=0
x²+Gx= -Fy
For completing square, add both side (G/2)²
x²+Gx+(G/2)²=-Fy+(G/2)²
(x+G/2)²=-F(y-G²/4F)
Or
X²=-FY where X=x+G/2, Y=y-G²/4F
which is the standard eq. of parabola in XY-coordinate.
4 0
3 years ago
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