Answer:
x = 2, y = 1
Step-by-step explanation:
- 7x + 5y = 19
- -7x - 2y = -16
Use the elimination method to solve the system of equations. Add the terms from top to bottom. 7x and -7x cancel out.
0 + 3y = 3
Divide both sides by 3.
y = 1
Substitute 1 for y into the first equation.
7x + 5(1) = 19
7x + 5 = 19
Subtract 5 from both sides.
7x = 14
Divide both sides by 7.
x = 2
Answer:
I believe the answer is x=7
Step-by-step explanation:
<em>3x</em> and<em> 4x-1 </em> are corresponding sides and so are <em>14</em> and <em>18</em>.
You cross multiply with the smaller triangle lengths at the top.
3x/(4x-1)= 14/18
Cross multiply to get
18(3x)= 14(4x-1)
54x=56x-14
Subtract 54x on the other side and add 14 to the other (or subtract 56x to the other side)
you get 14=2x and divide 14 by 2 to get x=7
X - the number of questions he answered correctly
y - the number of questions he answered incorrectly
There were 40 questions on the test.
The correct answers were given 5 points each, the incorrect answers were given -2 points each. He made a score of 95.
Set 40-x and (-95/2)+(5/2)x equal to each other:
Johnny answered correctly
25 questions.
All you have to do to solve this question is to plug in gx as any other number you would plug in to the f(x) to solve the equation.
So it would be
F(3x-8) = 3(3x-8)^2 - 5(3x-8) - 9
Then FOIL the terms in the binomial or the first term, then after expanding the first term, distribute the numbers into each term inside the bracket and then at the end gather like terms to simplify.
Answer:
Step-by-step explanation:
(x+4)2-3(x+4)-3=0
2x+8-3x-12-3=0
-1x-4-3=0
-1x-7=0
-1x=7
x=7/-1
x=-7
