Solve the problem.Juanita is having her yard landscaped. She obtained an estimate from two landscaping companies. Company A gave an estimate of $240 for materials and equipment rental plus $65 per hour for labor. Company B gave an estimate of $320 for materials and equipment rental plus $55 per hour for labor. We can represent this situation with the system of linear equationsc = 240 + 65xCompany Ac = 320 + 55xCompany Bwhere c is the total cost and x is the number of hours of labor. Graph the system. What is the x-coordinate of the intersection point of the graphs? Describe what this x-coordinate means in practical terms.
A. 7; there is a number of hours of labor, for which both companies charge $700.
B. 11; for 11 hours of labor, both companies charge the same.
C. 7; for 7 hours of labor, both companies charge the same.
D. 8; for 8 hours of labor, both companies charge the same.
Answer: D
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Express the statement as an equation involving the indicated variables.The volume V of a sphere is 
times ? times the cube of the radius r.
A. V = 
?r
B. V = 
?r3
C. V = 
?r2
D. V = 
? 
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A. (x + 25)2 B. (x - 25)2 C. Prime D. (x + 25)(x - 25)
Round the number as specified.21.3 to the nearest ten
A. 21.3 B. 20 C. 19 D. 21
Establish the identity.(1 - cos x)(1 + cos x) = sin2x
What will be an ideal response?