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It's Geometry (answer)

curved surface of a right cone is given by the formula: pi*r*√(r2+h2) where r=radius of the base and h=altitude of the cone find the altitude first h2+12.52=262 h2+156.25=676 h2=676-156.25 h2=519.75 h=22.8 feet 3.14*12.5*√[(12.5)2+(22.8)2] 3.14*12...

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find sec ?. (answer)

1+tan2(x)=sec2(x) 1+(-2)2=sec2(x) 1+4=sec2(x) 5=sec2(x) sec(x)=√5    

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if a_k= 5 + 5^2 + 5^3 + 5^4 + ... +5^k (answer)

5+5^2+5^3+5^4+...+5^k 5+25+125+625+...+5^k (5+25)+(125+625)+...+5^k 30+750+5^5+5^6=30+750+3125+15,625=30+750+(3125+15,625)= 30+750+18750 is divisible by 10 looking at the pattern...

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Exactly 5 actors try out for the 5 parts in a movie. (answer)

call the parts 1,2,3,4, and 5 call the actors A,B,C,D, and E here are the possibilities for A: A1, A2, A3, A4, A5 if  A does 1, we have A1 here are the possibilities for B: B2, B3, B4, B5 (A is doing part 1) if A does 2, we have A2 now here are the possibilities...

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How to solve (answer)

sin(x)+sin2(x)=1 sin2(x)+cos2(x)=1 is a trig identity sin(x)+sin2(x)=sin2(x)+cos2(x) sin(x)=cos2(x) Looking at cos2(x)+cos4(x) we have: sin(x)+[cos2(x)]2 sin(x)+[sin(x)]2 sin(x)+sin2(x) which equals 1 from your hypothesis above Therefore...

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how to find the slope from point slope form (answer)

If the slope is 0, the line is horizontal and parallel to the x-axis. The point-slope form is y-y1=m(x-x1) for the point (x1,y1). For example, use the point (2,3). y-3=0(x-2) y-3=0 y=3 is the equation of the line. This line is a horizontal line that is parallel to the x-axis...

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-14x2+44x-6=0 (answer)

-14x2+44x-6=0 14x2-44x+6=0 2(7x2-22x+3)=0 7x2-22x+3=0 (7x-1)(x-3)=0 7x-1=0 7x=1 x=1/7 x-3=0 x=3

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3x-2y=4 and x+3y=5 (answer)

3x-2y=4 x+3y=5 x=5-3y Now use the substitution method. 3(5-3y)-2y=4 15-9y-2y=4 15-11y=4 Try it from here Daphinee; solve for y by isolating the variable y. Once you have a value for y, replace y by this value in either of the original equations.

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2x-3y=-7 and 3x+4y=15 (answer)

2x-3y=-7 3x+4y=15 Multiply the first equation by 3 and the second equation by 2. 3(2x-3y)=3(-7) 2(3x+4y)=2(15) 6x-9y=-21 6x+8y=30 Subtract the second equation from the first equation. -17y=-51 y=(-51)/(-17) y=3 Substitute 3 for y in either...

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how to find the answer (answer)

Another way to solve the problem: Rachel spent 15 % of her money and saved the rest which is 85 % of her money.(100 %-15 %=85 %) 85 % of $40=0.85*40=$34 saved

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The left hand page number was? (answer)

let x and x+1 be the consecutive pages x(x+1)=1190 x2+x=1190 x2+x-1190=0 1190=119*10=7*17*2*5 17*2=34 and 7*5=35 35-34=1 (x+35)(x-34)=0 x-34=0 x=34 x+1=35 b. 34 is the answer Another simpler solution:You are multiplying two...

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The brace for a certain type of mailbox forms a 30°-60°-90° triangle with the side opposite the 30° angle 12 inches in length. What is the length of the side o (answer)

In a 30-60-90 right triangle, the side opposite the 30º angle is half the measure of the hypotenuse. Let x=the length of the side opposite the 60º angle. The hypotenuse has a measure of 24 inches and the leg opposite the 30º angle has a measure of 12 inches. Using the Pythagorean Theorem: 242=122+x2 576=144+x2 576-144=x2 432=x2 x=20...

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