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Question 1089313: A 7 feet long ladder leans against a wall and makes an angle of 60 degrees with the ground. How high up the wall does the ladder reach?
A)2√3 /7
B)7√3 /2
C)√3 /14
D)7√3
Click here to see answer by addingup(3677)

Question 1089328: If sin(pi/2 -x)=0.35, what's cos x?
A).35
B).43
C).45
D).53
Click here to see answer by Alan3354(69443)

Question 1089328: If sin(pi/2 -x)=0.35, what's cos x?
A).35
B).43
C).45
D).53
Click here to see answer by solver91311(24713)

Question 1089327: If an angle x measured counter clockwise from the positive x axis terminates in the third quadrant, which of the following is true?
A) both of sin(x) and cos(x) are negative
B) both of sin(x) and cos(x) are positive
C) sin(x) is negative and cos(x) is positive
D) sin(x) is positive and cos(x) is negative
Click here to see answer by Alan3354(69443)

Question 1089331: If an angle x measured counter clockwise from the positive x axis terminates in the third quadrant, which of the following is true?
A) both of sin(x) and cos(x) are negative
B) both of sin(x) and cos(x) are positive
C) sin(x) is negative and cos(x) is positive
D) sin(x) is positive and cos(x) is negative
Click here to see answer by solver91311(24713)

Question 1089336: If sin(pi/2 -x)=0.35, what's cos x?
A).35
B).43
C).45
D).53
Click here to see answer by ikleyn(52781)

Question 1089334: Which of the following confunctions is/are true?
A)sin(90�-x)=Cos(x)
B)cos(90�-x)=sin(x)
C)tan(90�-x)==cot(x)
D) all of the above
Click here to see answer by ikleyn(52781)

Question 1089326: Which of the following confunctions is/are true?
A)sin(90�-x)=Cos(x)
B)cos(90�-x)=sin(x)
C)tan(90�-x)==cot(x)
D) all of the above
Click here to see answer by ikleyn(52781)

Question 1089337: If sin(x-pi/2)=0.2, what's cos x?
A).8
B).98
C)-0.2
D)0.2
Click here to see answer by ikleyn(52781)

Question 1089321: If a+b=90 degrees, which if the following must be true?
A)cos(a)=cos(b)
B)sin(a)=sin(b)
C)sin(a)=cos(b)
D)sin(a)= -cos(b)
Click here to see answer by ikleyn(52781)

Question 1089319: If sin(pi/2 -x)=0.35, what's cos x?
A).35
B).43
C).45
D).53
Click here to see answer by Alan3354(69443)

Question 1089341: In a class, there are 20 boys whose average age is decreased by 2 months, when one boy aged 18 years is replaced by a new boy. The age of the new boy is?
Click here to see answer by solver91311(24713)

Question 1089343: The average of marks obtained by 120 candidates was 35. If the average of marks of passed candidates was 39 and that of failed candidates was 15, the number of candidates who passed examination is
Click here to see answer by ankor@dixie-net.com(22740)

Question 1089355: What's the measure in radians of the smallest positive angle x that will give the maximum value for y=3-cos(2x)?
A)0
B)pi/2
C)pi
D)3pi/2

Click here to see answer by josmiceli(19441)

Question 1089354: If the leaning tower of pisa is 55m tall and the top edge of the tower leans 5 meters out from the bottom edge, what's the sine of the angle created between the ground and the tower?
A)1
B)0.091
C)0.993
D)0.996

Click here to see answer by josmiceli(19441)

Question 1089356: Which of the following trignometric function(s) has (have) no end behavior? (Asymptotes)?
Sin(x)
Cos(x)
Tan(x)
Click here to see answer by MathLover1(20849)

Question 1089348: If sin(x-pi/2)=0.2, what's the cos x?
A)0.8
B)0.98
C)-0.2
D)0.2
Click here to see answer by MathLover1(20849)

Question 1089351: Angles x and y are both acute angles where angle x is greater than y and the sin (x degrees)= cos(y degrees). If x=3k-11 and y=2k-9, what's the value of k?
A)12
B)22
C)23.5
D)27.5

Click here to see answer by ikleyn(52781)

Question 1089374: Angles x and y are both acute angles where angle x is greater than y and the sin (x degrees)= cos(y degrees). If x=3k-11 and y=2k-9, what's the value of k?
A)12
B)22
C)23.5
D)27.5
Click here to see answer by ikleyn(52781)

Question 1089344: If selling price is doubled, the profit triples. Find the profit percent.
Click here to see answer by MathLover1(20849)

Question 1089346: The average temperature from Monday to Thursday is 48 degrees and from Tuesday to Friday is 52 degrees. If the temperature on Monday is 42 degrees, what was it on Friday
Click here to see answer by ikleyn(52781)

Question 1089447: For what value of θ is cosθ
So ...≤θ<....?
Click here to see answer by ikleyn(52781)

Question 1089439: Five points A,B,C, D and e lie on a line. Point b is the midpoint of AC, and point D is the midpoint of BC. If AC is 12 and DE is 2, what's the sum of the possible lengths of segment AE?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1089454: if the average of 123 consecutive integers is 321, find the sum of the smallest and the largest of these integers.
Click here to see answer by ankor@dixie-net.com(22740)

Question 1089450: Five points A,B,C, D and e lie on a line. Point b is the midpoint of AC, and point D is the midpoint of BC. If AC is 12 and DE is 2, what's the sum of the possible lengths of segment AE?
Click here to see answer by KMST(5328)

Question 1089416: In a figure, the circle has center O and radius 3. If the area of the minor sector AB is between 5 and 10. What's one possible integer value of arc length s that's in middle of AB?
Click here to see answer by KMST(5328)

Question 1089508: (3x+4y)(3x-4y)
Click here to see answer by ikleyn(52781)

Question 1089488: Please help me this equation: �=1,y=-3; 2x 3squared plus 4x-3y 2squared
Click here to see answer by ikleyn(52781)

Question 1089511: The three angles of a triangle have measures x,2x, and 4y where x>56. If x and y are integers, what's one possible value of y?
Click here to see answer by Fombitz(32388)

Question 1089514: The area of an equilateral triangle XYZ is 4 times the area of equilateral triangle ABC. If the perimeter of ABC is 12, what's the length of one side of XYZ?
A)6
B)8
C)10
D)12
Click here to see answer by KMST(5328)

Question 1089546: Decide if the system of equations in two variables is linear or nonlinear.
x=4y+3
3x-y=4
Linear
Nonlinear

Click here to see answer by ikleyn(52781)

Question 1089546: Decide if the system of equations in two variables is linear or nonlinear.
x=4y+3
3x-y=4
Linear
Nonlinear

Click here to see answer by josgarithmetic(39617)

Question 1089556: Greg is opening a car wash. He estimates his cost equation as c= 6000+0.06x
and his revenue equation as��R= 1.85x where x is the number of cars washed in a six-month period. Find the number of cars that must be washed in a six-month period for Greg to make a profit.
Click here to see answer by josmiceli(19441)

Question 1089545: Write an equation that expresses the relationship. Use k as the constant of variation.
The weight of a body above the surface of the earth is inversely proportional to the square of its distance from the center of the earth. What is the effect on the weight when the distance is multiplied by 7?
thank you for help
Click here to see answer by josgarithmetic(39617)

Question 1089557: A developer wants to enclose a rectangular grassy lot that borders a city street for parking. If the developer has 236 feet of fencing and does not fence the side along the street, what is the largest area that can be enclosed?
Click here to see answer by ikleyn(52781)

Question 1089552: Julie and Eric row their boat (at a constant speed) 63 miles downstream for 7 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 9 hours. Find the rate of the current.
Click here to see answer by ikleyn(52781)

Question 1089548: The value of a particular investment follows a pattern of exponential growth. In the year 2000, you invested money in a money market account. The value of your investment t years after 2000 is given by the exponential growth model A=3200e^0.06t��How much did you initially invest in the account?
Click here to see answer by Theo(13342)

Question 1089554: C(x) =�130x/100-x , 0 ≤ x < 100
describes the cost, C, in millions of dollars, to inoculate x% of the population against a particular strain of the flu. Determine the difference in cost between inoculating 70% of the population and inoculating 40% of the population. (Round to the nearest tenth, if necessary.)
Click here to see answer by Theo(13342)

Question 1089553: Ron attends a cocktail party (with his graphing calculator in his pocket). He wants to limit his food intake to 109 g protein, 103 g fat, and 153 g carbohydrate. According to the health conscious hostess, the marinated mushroom caps have 3 g protein, 5 g fat, and 9 g carbohydrate; the spicy meatballs have 14 g protein, 7 g fat, and 15 g carbohydrate; and the deviled eggs have 13 g protein, 15 g fat, and 6 g carbohydrate. How many of each snack can he eat to obtain his goal?
Click here to see answer by ikleyn(52781)

Question 1089550: The logistic growth function f(t) =53,000/1+1059.0e^-1.5t
models the number of people who have become ill with a particular infection t weeks after its initial outbreak in a particular community. What is the limiting size of the population that becomes ill?

Click here to see answer by Theo(13342)

Question 1089549: Two recording devices are set 2600 feet apart, with the device at point A to the west of the device at point B. At a point on a line between the devices, 300 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?
Click here to see answer by Theo(13342)

Question 1089539: How to solve for 4 3/4 * 6
Click here to see answer by rothauserc(4718)

Question 1089584: What number is halfway between (a)250 and 450 (b)2500 and 5500?

Click here to see answer by Edwin McCravy(20055)

Question 1089585: Two hundred twenty-five is closer to which multiple of 10?

Click here to see answer by Edwin McCravy(20055)

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