Answer:
r =29.82
Step-by-step explanation:
r/7.1 = 4.2
Multiply each side by 7.1
r/7.1 *7.1 = 4.2*7.1
r =29.82
Answer: 7 and 8
<u>Step-by-step explanation:</u>
Let x represent the first number, then x + 1 is the other number.
(x)² + (x + 1)² = 113
x² + x² + 2x + 1 = 113 <em>expanded (x + 1)²</em>
2x² + 2x + 1 = 113 <em>added like terms</em>
2x² + 2x - 112 = 0 <em>subtracted 113 from both sides</em>
x² + x - 56 = 0 <em> divided both sides by 2</em>
(x + 8) (x - 7) = 0 <em>factored polynomial</em>
x + 8 = 0 x - 7 = 0 <em>applied zero product property</em>
x = -8 x = 7 <em> solved for x</em>
↓
not valid since the restriction is that x > 0 <em>(a positive number)</em>
So, x = 7 and x + 1 = (7) + 1 = 8
Answer:
C
Step-by-step explanation:
because if u add them together you get the answer
f(x)=((x-4)(x+3))/(x+3)
simpify
f(x)=x-4
see we eliminated x+3?
That is a hole
find the value of that hole
x+3=0
x=-3
input into simplified function
f(-3)=-3-4
f(-3)=-7
the hole (discontinuity) is at (-3,-7)
f(x)=x-4
where does it cross x axis?
0=x-4
4=x
xint is x=4 or (4,0)
yint is where x=0
f(0)=0-4=-4
yint is (0,-4)
basically
it is a line, f(x)=x-4 with a hole at
(-3,7)
with xint at (4,0) and yint at (0,-4)
