Answer:
x=3, y=-1
Step-by-step explanation:
We are already given an equation solved for x, making substitution much easier. We know x=4y+7, meaning we can put 4y+7 whenever we see x in the second equation
2x-6y=12
We substitute 4y+7 in place of x
2(4y+7)-6y=12
Now we only have one variable to work on, distribute the 2
8y+14-6y=12
Combine similar terms, 8y-6y=2y
2y+14=12
Subtract 14 from both sides
2y=-2
y=-1
Now we plug in -1 for y in the first equation to find x
x=4(-1)+7
x=-4+7
x=3
Answer:
<em>The</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em>p</em><em>/</em><em>6</em><em>-4</em><em>/</em><em>5</em><em>.</em>
<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helps</u></em>
Answer:
90
Step-by-step explanation:
Quarters , q = 25 cent
Nickel, n = 5 cent
3 times as many nickels as quarters;
n = 3q
Total value of coins = $12
n + q = $12
0.05n + 0.25q = 12
0.05(3q) + 0.25q = 12
0.15q + 0.25q = 12
0.40q = 12
q = 12 / 0.40
q = 30
n = 3q
n = 3(30)
n = 90
90 nickels
Answer:
6
Step-by-step explanation:
f (x)=x^2and g(x)=x+6 (I will assume you meant x not c)
The first step if to find f(0)
f(0) = 0^2 = 0
Now we find g(f(0))= g(0)
g(0) = 0+6 = 6
g(f(0) =6
If you meant c
Then g(f(0) = c+6
Answer:
No valid conclusion
Step-by-step explanation:
- All rhombuses are parallelograms
- Not all parallelograms are rhombuses because a rhombus has four equal-length sides and a parallelogram has equal opposite sides.
- all squares are rhombuses but not all rhombuses are squares because a square has 4 right angles (90 degrees) and a rhombus has equal opposite angles
