On a 300 point standardized test, Luca earned 82% of the points. How many of the 300 points did Luca earn?
1 answer:
Answer:
1. He earned 246
82% = 0.82
Move decimal right twice
82 x 300 is 24600
Move decimal left twice
= 246
2. 25
Solve for Y (Total Diamonds)
12 = 48% × Y
12 = × Y
Y = 12 ×
Y = 12 × 100 ÷ 48
Y = 25
3.80.95%
Solve for "%"
% = 34/42
% = 0.8095 (rounded)
Convert decimal to percent using percent formula:
% = 0.8095 × 100 = 80.95%
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Answer:
y=2x^2 + 2x - 3 x -2 -1 0 1 2
Step By Step Explanation:
The values can be find by plugging the x values in the equation which gives us the y value ,
x -2 -1 0 1 2
y 1 -3 -3 1 9
(b) Plot the points on the graph and join by a smooth curve.
(c) The line y=1 will be passing through 1 and parallel to x-axis.
(d) solve 2x^2 + 2x - 3 = 1
Subtract 1 from both the sides ,
2x^2 + 2x - 2 = 0
Factoring out the 2 from the equation ,
2(x^2 + x - 1) = 0
x^2 + x - 1 = 0
Apply the quadratic formula
x=(-1-sqrt(5))/2 and x = (-1+sqrt(5))/5
