Answer: 83.7
Step-by-step explanation: Do 0.3 x 279 to get 83.7.
Multiply all terms by x and cancel
xx+-15=2x
x^2-15=2x simplify both sides
x^2-15-2x=2x-2x subtract 2x from both sides
x^2-2x-15=0
(x+3)(x-5)=0 factor left side of equation
x+3=0 or x-5=0 set factors equal to 0
x=-3 or x=5
hope this helps!
Part +part = whole
?+.5=4.6
4.6-0.5=4.1
rock A weighs 4.1 kilos
Answer:
y = 0.75x + 53.67
Step-by-step explanation:
Answer:
a. .
b. The axis of symmetry for is .
Step-by-step explanation:
a. The vertex form of a quadratic is given by , where (h, k) is the vertex.
To convert from form to vertex form you use the process of completing the square.
Step 1: Write in the form . Add and subtract 4:
Step 2: Complete the square
b. The graph of a quadratic function is a parabola. The axis of symmetry of a parabola is a vertical line that divides the parabola into two congruent halves. The axis of symmetry always passes through the vertex of the parabola. The x-coordinate of the vertex is the equation of the axis of symmetry of the parabola.
For a quadratic function in standard form, , the axis of symmetry is .
The axis of symmetry for is .
Look at the graph shown below.