multiply 0*5 to get 0

multiply 0*5 to get 0

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replace "parallelogram" with "square or a rhombus", or... ...parallelogram with equal sides including a square.

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I assume that it is a regular polygon. The sum of the measures of the exterior angles of a polygon is always 360 degrees. 360/25=14.4 degrees Each interior angle is... (n-2)(180)=(25-2)(180)=23*180=4140 degrees 4140/25=165.6 degrees for each interior angle each interior angle and it's exterior angle...

Pre-Algebra Averages problem (answer)

(49+49+49+x)/4=37 (147+x)/4=37 147+x=4*37 147+x=148 x=148-147 x=1 yard his fourth throw was only 1 yard look at it this way... an average of 49 in 3 throws is the same as 3 throws of 49 each 49-12=37, 49-12=37, 49-12=37 each throw of...

It sounds a little ambiguous but... draw a rhombus and its diagonals you have 4 triangles look at the top one some facts about a rhombus... the diagonals intersect at right angles the diagonals bisect the angles consecutive angles are supplementary opposite angles...

x=the number 2(1/x)=40*(1/50) 2/x=40/50 2/x=4/5 cross multiply 4x=10 x=10/4 x=5/2 or 2 1/2 or 2.5

distance=rate*time the distances will be the same d=60*t d=40*(5-t) equate the right sides 60t=40(5-t) 60t=200-40t 60t+40t=200 100t=200 t=200/100 t=2 hours to go to Alabama 5-2=3 hours to drive back home from Alabama check: 60*2=120 and 40*3=1...

linear equations (answer)

x+y=1717 x-y=11 add 2x=1728 x=864 864+y=1717 y=1717-864 y=853

Trig Identities (answer)

sin(x)=-sin(2x)+sin(5x) rearrange the terms sin(5x)-sin(x)=sin(2x) sin(a)-sin(b)=2cos([a+b]/2)sin([a-b]/2) therefore the left side becomes... 2cos([5x+x]/2)sin([5x-x])/2) 2cos(3x)sin(2x) now we have... 2cos(3x)sin(2x)=sin(2x) 2cos(3x)sin(2x)-sin(2x)=0 factor...

draw a right triangle one side is the height the nest is above the ground-call it n the other side is 15 feet the hypotenuse is the line of sight at 62 degrees tan=opposite/adjacent tan62º=n/15 (15)(tan62º)=n n=(15)(1.880726465) n=28.21089698 n=28 feet above the...

(sin/[1-csc])-(sin/[1+csc])=-2cot^2 rewrite with a common denominator [(sin)(1+csc)-(sin)(1-csc)]/(1-csc)(1+csc)= {(sin)([1+csc]-(sin)[1-csc]}/(1-csc^2)= factor out sin in the numerator (sin)(1+csc-[1-csc])/(1-csc^2)= (sin)(1+csc-1+csc)/(1-csc^2)= (sin)(2csc)/(1-csc^2)= 1+cot^2=csc^2...

distance=rate*time 230=120*t 230/120=t 23/12 hours going 120 km/hr 170=60*t 170/60=t 17/6 hours going 60 km/hr add the hours together 23/12 + 17/6=23/12 + 17/6=23/12 + 34/12=57/12 hours which simplifies to 19/4 hours the...

(5/7)-(5/8) (40/56)-(35/56) (40-35)/56 5/56 of a bushel

x=atan simplify x^2/√(a^2+x^2) replace x by atan (atan)^2/√(a^2+[atan]^2) a^2tan^2/√(a^2+a^2tan^2) a^2tan^2/√a^2(1+tan^2) a^2tan^2/a√(1+tan^2) atan^2/√(1+tan^2) atan^2/√sec^2 atan^2/sec (asin^2)/(cos^2)÷sec (asin^2)/(cos^2)÷(1/...

440*4=1760 yards which is 1760*3=5280 feet which is 1 mile 10 minutes/60 minutes=1/6 of an hour 1 mile in 1/6 of an hour 6miles in 1 hour 6 miles/1 hour

42x-7y factor out the number 7 7(6x-y)

Word Problem (answer)

x=side of the square 3x^2=x^2+9x+18 3x^2-x^2-9x-18=0 2x^2-9x-18=0 2*18=2*2*3*3=(2*2*3)*(3)=12*3 and 12-3=9 factor (2x+3)(x-6)=0 x-6=0 x=6 cm check: 6+6=12, 6+3=9, 12*9=108 and 3*36=108

3 red + 5 blue marbles total of 8 marbles (5/8)(4/7)=20/56=5/14

distance=rate*time 640=r*4+(r+5)*7 640=4r+7r+35 640=11r+35 640-35=11r 605=11r r=605/11 r=55 kph r=55=5=60 kph is the speed of the train check: 55*4+60*7=220+420=640 km

inside the square pyramid construct a right triangle one leg is the height of 24 in and the other leg is the distance from the center of the square perpendicular to one side which is half the length of one side which is therefore 7 in the hypotenuse is the slant height of the pyramid find...

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