Answer:
Expression: 6x + 30
Step-by-step explanation:
2[x + (x + 5) + (x + 2(5))]
2[2x + 5 + x + 10]
2(3x + 15)
6x + 30
The second question's terminology is too ambiguous for me to answer, apologies.
Answer:
$261
Step-by-step explanation:
Simply multiply 0.6 by 435
Answer:
3 and -4
Step-by-step explanation:
First, you write out each statement as an equation:
x + y = -1
2x + 4y = -10
Next, rewrite one equation so only x is on one side of the equation, and plug it into the other equation, and solve for y:
x = -y - 1
2 (-y - 1) + 4y = -10
-2y - 2 + 4y = -10
2y = -8
y = -4
Plug the found value for y into the original equation and solve for x:
x + y = -1
x - 4 = -1
x = 3
Plug both values into the second equation to check your work:
2x + 4y = -10
2(3) + 4(-4) = -10
6 - 16 = -10
-10 = -10
We have that
f(x)=2x²<span>+7x-5
</span>g(x)=-8x²<span>-3x+5
</span>
g(x)+f(x)=[-8x²-3x+5]+ [2x²+7x-5]
=(-8x²+2x²)+(-3x+7x)+(5-5)
=-6x²+4x+0
the answer is
-6x²+4x
Answer:
700
Step-by-step explanation:
-300 - (-50*4)= 700
