Provide an appropriate response.Does every straight line have an x-intercept? If not, give an example of an equation whose graph does not have an x-intercept.
What will be an ideal response?
The x-intercept is the point where the line crosses the x-axis. Lines parallel to the x-axis do not intercept the x-axis. Thus the graph of any equation of the form 
where 
has no x-intercept.
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Write the number in scientific notation. ?- 0.000375? ?
A. - 3.75 × 10-4 B. - 3.75 × 102 C. 3.75 × 103 D. - 0.000375 × 104 E. 0.000375 × 102
Factor completely.a2 - 100
A. (a + 10)(a - 10) B. (a2 + 10)(a2 - 10) C. (a + 100)(a - 100) D. (a - 10)2
Solve.-8.7 ? 1.3 - 0.2(5x + 3) < 7.62
A. -5.72 ? x < 6.8 B. -5.72 < x ? 6.8 C. -6.92 ? x < 9.4 D. -6.92 < x ? 9.4
Several triangles are shown below with congruent sides, congruent angles and right angles shown.
(a) Which ones are scalene triangles?
(b) Which ones are isosceles triangles?
(c) Which ones are right triangles?
(d) Which ones are equilateral triangles?
(e) Which ones are obtuse triangles?
