Monday

May 2, 2016
Total # Posts: 34,416

**math**

(x,y) ---> (x-2, y-1) then (x-2,y-1) --> (x-2 + 5, y-1 + 6) or (x,y) ---> (x+3, y+5) illustrate by picking any point and seeing what happens.
*February 10, 2016*

**Math**

solve for x .28 x = 168 x = 168/.28 = ...
*February 10, 2016*

**math**

x - 5 ≤ 20 "at most" means it can't go over 20, so it has to be less than. Your expression said > 20 Furthermore, by saying the difference between a number and 5, you don't say which way we are subtracting. e.g. if I say what is the difference ...
*February 10, 2016*

**math**

Just did it when you were Tommy http://www.jiskha.com/display.cgi?id=1455143548
*February 10, 2016*

**i need help please math**

reflection in the y-axis (x,y) ---> (-x,y) reflection in the x-axis (-x,y) ---> (-x, -y) so (x,y) --> (-x,-y) , which is a reflection in the origin. pick a point and illustrate it on a grid. e.g. watch what happens to (3,5)
*February 10, 2016*

**Math PLEASE HELP**

Just add them up, then divide by 10. That would be just like finding the average. Hint: change them to decimals, they all come out nice that way, simpler to add them that way e.g. 4 ¼ kg = 4.25 kg
*February 10, 2016*

**Mathematics**

look at my attempt here http://www.jiskha.com/display.cgi?id=1455132924
*February 10, 2016*

**Cal 2**

V = π ∫(9/x^2) dx from x=3 to 5 = π( -9/x) | 3 to 5 = π(-9/5 - (-9/3) ) = π(6/5) = 1.2π cubic units
*February 10, 2016*

**Algebra**

Well, you got it 4t^2 - 20t - 150 = 0 by the formula t = (20 ± √2800)/8 =9.11 or a non-admissible negative value
*February 10, 2016*

**Maths**

x^2+2xy+2y^2+6y = x^2+2xy+y^2 + y^2+6y = (x+y)^2 + y(y+6) = S x _ y _ S 0 0 0 1 0 1 2 0 4 3 0 9 4 0 16 ... 0 1 8 0 2 20 .. -------no future here, S gets bigger try negative values 0 -6 36 1 -6 25 .. 5 -6 1 5 -5 -5 1 -1 -5 2 -2 -8 3 -3 -9 <-------- LOOKS LIKE THAT IS IT 4 -4...
*February 10, 2016*

**Geometry**

I assume that you have listed the two triangles in matching vertices, that is, A <--> D , etc let AB = 2x then DE = 3x , must be in the ratio of 2:3 if AB = 2BC 2x = 2BC BC = x given: DE = 3BC DE = 3x , (we already knew that) then EF = 6x
*February 10, 2016*

**Math**

I will assume you mean m^9t^-10/(m^-4t^-5) = m^13 t^-5 or m^13/t^5 you are correct
*February 10, 2016*

**Cal 2**

no need for calculus. your solid is a fulcrum formed by the following: You have a cone on its side, (the x-axis is the axis of the cone) height = 3, radius = 9 the other : height = 5, radius = 15 V = (1/3)π(15^2)(5) - (1/3)π(9^2)(3) = (1/3)π (1125 - 243) = 882&#...
*February 10, 2016*

**math**

$1,4000 ?? I assume you meant $1,400 what is .65(1400) ?
*February 10, 2016*

**algebra**

complex roots always come in conjugate pairs, so we have x = -3i and x = 3i two factors are (x + 3i) and (x- 3i) (x+3i)(x-3i) = x^2 - 9i^2 = x^2 + 9 Using long algebraic division, you should get ( 3x^4+5x^3+25x^2+45x-18) ÷ (x^2+9) = 3x^2 + 5x + 2 the quadratic formula ...
*February 10, 2016*

**math**

Using the basic definitions: a + 4d = -12 a + 9d = 27 subtract them 5d = 39 d = 39/5 or 7.8 sub back in .... a+4(7.8) = -12 a = -43.2 sequence is: -43.2 , -35.4, -27.6, -19.8, -12, ... term15 = a + 14 d = ..... B) The first three terms of an A. P are x and the 10th term. That ...
*February 10, 2016*

**Math**

My crystal ball does not seem to be working today. I just can't seem to conjure up your parallelogram.
*February 10, 2016*

**Cal 2**

Just did this http://www.jiskha.com/display.cgi?id=1455128294
*February 10, 2016*

**Cal 2**

no Calculus needed. extend the sides to form the original cone. let the height of the added cone be h by ratios h/13 = (h+25)/30 30h = 13h + 325 17h = 325 h = 325/17 volume of fulcrum = (1/3)π(30^2)(25 + 325/17) - (1/3)π(13^2)(325/17) = (1/3)π[900(25+325/17) - ...
*February 10, 2016*

**math**

basic trig: sinØ = 5/8 = .. Ø = appr 38.7°
*February 10, 2016*

**Algebra 2**

from the first: y = -2x-11 into the 2nd 3x - 4(-2x-11) = 11 3x + 8x + 44 = 11 11x = -33 x = -3 No need to find y, the only one with x=-3 is the third one. To make sure, sub (-3,-5) into both equations.
*February 10, 2016*

**Math**

solve: 15m = 5m + 1100
*February 10, 2016*

**maths class8**

see your previous post
*February 10, 2016*

**maths**

now: son --- x father -- 5x 5 years ago: son = x-5 father = 5x-5 5x-5 = 7(x-5) solve for x
*February 10, 2016*

**algebra**

I started with x = ±1 and got x= 1 so (x-1) is a factor and also found x = ±2 to work so (x+2)(x-2) were factors so x^4+6x^3-11x^2-24x+28 = (x-1)(x-2)(x+2)(x .... ?) so far my constant multiply to get 4, but I need +28, so the last digit must be +7 x^4+6x^3-11x^2...
*February 10, 2016*

**let's try again - Math**

oops, just noticed my third equation is wrong Here we go again: I will use the notation a = (2,-1,1) , b= (1,-3,1) , c=(-2,1,-3) and d=(3,2,5) so 2p + q - 2r = 3 -p - 3q + r = 2 p + q - 3r = 5 add the 2nd and 3rd: -2q - 2r = 7 2q +2r = -7 ** double the 2nd , then add to the ...
*February 10, 2016*

**Math**

I will use the notation a = (2,-1,1) , b= (1,-3,1) , c=(-2,1,-3) and d=(3,2,5) so 2p + q - 2r = 3 -p - 3q + r = 2 -2p + q - 3r = 5 add 1st and 3rd: 2q - 5r = 8 ** double the 2nd , then add to the first: -5q = 7 q = -7/5 into ** -14/5 - 5r = 8 -5r = 54/5 r = -54/25 into the 1st...
*February 10, 2016*

**Math**

number of P5's --- x number of P1's --- y x+y = 16 5x + 1y = 44 subtract them: 4x = 28 x = 7 y = 9 check: 5(7) + 1(9) = 44
*February 10, 2016*

**math**

Case1: the number of hours is single digit hours --- h unit digit of minutes --x tens digit of minutes --y x+10y = 5h ** x+y+h = 15 h = 15-x-y 5h = 75 - 5x-5y *** equating ** and *** x+10y = 75-5x-5y 6x + 15y = 75 2x + 5y = 25 x = (25-5y)/2 --> 25 - 5y must be even so it ...
*February 10, 2016*

**Trigonometry**

Once you make your diagram, it is easy to see that we can use the cosine law. AC^2 = 560^2 + 320^2 - 2(320)(560)cos104° = 502704.8074 AC = appr 709 miles
*February 10, 2016*

**algebra**

f(g(-7)) = f(-14-6) = f(-20) = 60-4 = 56
*February 9, 2016*

**Mathh**

5 marbles out of 12 Prob(red) = 5/12
*February 9, 2016*

**math**

yes, but usually a unit of 1 is used 2.5 inches : 79 miles 1 inch : 79/2.5 mile 1 inch : 31.6 miles If you use the same units, they can be skipped in the scale ... 31.6 miles = (31.6)(12)(5280) inches 2002176 inches so you could state the scale as 1 : 2,002,176
*February 9, 2016*

**mathemathics**

Just did this in your earlier post of this.
*February 9, 2016*

**math**

let the unit digit be x then the hundred digit is 2x let the tens digit by y so the number is 100(2x) + 10y + x = 201x + 10y the number reversed is 100(x) + 10y + 2x = 102x + 10y 201x+10y - (102x+10y) = 396 99x = 396 x = 4 looks like y can be any digit from 0 to 9 the original...
*February 9, 2016*

**MATH**

let the angles be 3x and 2x their sum = 90° 5x = 90 x = 18 the smaller angles is 2x = 36°
*February 9, 2016*

**Math**

I attempted this question yesterday. Had some doubts about the typing http://www.jiskha.com/display.cgi?id=1454969855
*February 9, 2016*

**shelby**

rise --- x m hypotenuse -- x+32 run --- x+31 x^2 + (x+31)^2 = (x+32)^2 x^2 + x^2 + 62x + 961 = x^2 + 64x + 1024 x^2 - 2x - 63 = 0 (x-9)(x+7) = 0 x = 9, or x = -7 which would be silly the sides are 9, 40, and 41 check: 9^2 + 40^2 = 41^2, true!
*February 9, 2016*

**algebra**

L = k(1/d^2) for the given: 75 = k(1/225) k = 16875 L = 16875/d^2 then if d = 47 L = 16875/47^2 = 7.6 decibels
*February 9, 2016*

**college algebra**

b) .12x c).15y d) your equation should say .12x + .15y = 64500 times 100 12x + 15y = 6450000 divide it by 3 4x + 5y = 2150000 first equation times 4 4x + 4y = 2000000 subtract them: y = 150,000 then x = 350,000 check: .12(350000) + .15(150000) = 64500
*February 9, 2016*

**algebra**

"Type your answer in the box provided "... tells me that you simply want us to do your assignment for you. This question is of such fundamental nature, that you absolutely MUST know how to do it. What are your steps so far ?
*February 9, 2016*

**Cal 2**

the x-intercepts for both functions are c and -c If you look at your sketch there is symmetry about the y-axis as well, so we could just take our area from 0 to c 4∫(c^2 - x^2) dx = 230 from 0 to c ∫(c^2 - x^2) dx = [c^2 x- (1/3)x^3] from 0 to c = (c^3 - (1/3)c^3...
*February 9, 2016*

**algebra**

the simplest right-angled triangle has sides 3,4, and 5 If you did not know that, let the three sides be x, x+1, and x+2 x^2 + (x+1)^2 = (x+2)^2 x^2 + x^2 + 2x + 1 = x^2 + 4x + 4 x^2 - 2x - 3 = 0 (x-3)(x+1) = 0 x = 3 or x = -1, the last one is silly x=3 conclusion ....
*February 9, 2016*

**Math- Calc**

done, look back a few posts
*February 9, 2016*

**Algebra**

(6x^-2)^2(0.5x)^4 = (36x^-4)(1/16)(x^4) = 36/16 x^0 , but x^0 = 1 = 36/16 = 9/4
*February 9, 2016*

**Algebra**

at the x-intercepts, y = 0 , so ... x^2 + 0 + 8x - 0 - 49=0 using completing the square: x^2 + 8x +16 = 49+16 (x+4)^2 = 65 x+4 = ±√65 x = -4 ± √65 or appr 4.06 or appr -12.06 confirmation. Notice your equation represents a circle http://www....
*February 9, 2016*

**Math**

f(x) = |(x+9)(x-7)| the function y = (x+9)(x-7) would have x-intercepts at -9 and 7 , and it would dip below the x-axis between these two values. So the |...| flips that part above the x-axis, causing CUSPS at x =-9 and x=7 the derivative does not exist for those two values.
*February 9, 2016*

**Maths**

I will assume you meant to say: The first term of an arithmetic sequence is 23 and the 12th term is 72. So a = 23 , and a+11d = 72 23+11d = 72 11d = 49 d = 49/11 take over, all you have to do is use the formulas
*February 9, 2016*

**algebra equations**

Bosnian, you are correct if the number is 31/6 then 31/6 + 5(31/6) - 4 = 31/6 + 155/6 - 4 = 31-4 = 27
*February 9, 2016*

**Math**

if you want the prob of a 5 OR a 6 OR an odd, then it would be 4/6 = 2/3 If you want the prob of a 5 AND a 6 AND an odd, then it would be 0
*February 9, 2016*

**Math**

Not clear if the new monies are transferred from the other person's wallet, or if they are new monies. e.g. Do the 80 cents that Cheryl puts in her wallet come from Sally? Please clarify.
*February 9, 2016*

**math**

number of plates = 10x10x10 x 26x26 = 676,000
*February 9, 2016*

**Math**

just add them 4y = 28 y = 7 sub back into the 2nd x - y = 15 x - 7 = 15 x = 22
*February 8, 2016*

**optional math**

for AP first -- a fourth --a+3d ninth -- a+8d these are to be in GP (a+3d)^2 = a(a+8d) a^2 + 6ad + 9d^2 = a^2 + 8ad 9d^2 - 2ad = 0 d(9d -2a) = 0 d = 0 or a = 9d/2 reject d=0, because the sequence simply becomes a, a, a, .... which technically is an AP as well as a GP if a = 9d...
*February 8, 2016*

**Math**

From the many ways your ambiguous way of typing could be interpreted , I will choose (16x-12)/(4x^2+5x-6) - 3/(x+2) = 4(x-3)/( (x+2)(4x-3) ) - 3/(x+2) = (4(x-3) - 3(4x-3))/((x+2)(4x-3)) = (4x - 12 - 12x + 9)/((x+2)(4x-3)) = (-8x - 3)/((x+2)(4x-3))
*February 8, 2016*

**Maths**

make a sketch to see that the 10.5 cm becomes the hypotenuse of the cone and the circumference of the cone is the arc length of the sector. 160° = 160/180π radians = 2.7925.. radians arc = 2.7925(10.5) = 29.32153.. this becomes the circumf of the base of the cone 2&#...
*February 8, 2016*

**Algebra**

time = distance/rate 90 miles/hour = 90(5280) ft / 3600 seconds = 132 ft/s so time = 60.5 ft/132 ft/s = .45833... seconds = appr .46 seconds
*February 8, 2016*

**Geometry**

your value of a is correct. Actually your given triangle is a 30-60-90 right-angled triangle with sides in the ratio 1 : √3 : 2 = 50: 50√3:100 You didn't say which of the legs is the x and the other the y. Assume the x is opposite the 30° angle then the ...
*February 8, 2016*

**pre-calculus**

your x(x-3)<2 or x(x-3)<2 are the same expression did you mean: x(x-3)<2 or x(3-x)<2 ? some preliminary... clearly any negative value of x will work, since -(+) is negative which is < 2 notice that is true for all x < 1 so x < 1 also if x = 2, we have 2|-1...
*February 8, 2016*

**math**

(3^x)(5^x) + 1 = 20 (15)^x = 19 use logs x log15 = log 19 x = log19/log15 = appr 1.08729 Use your calculator to check, it works
*February 8, 2016*

**Math**

areas of similar shapes are proportional to the square of their corresponding sides ratio of their areas is 2^2 : 3^2 = 4 : 9
*February 8, 2016*

**basic algebra**

unit digit --- x tens digit ----x+4 x^2 + (x+4)^2 = 26^2 solve the quadratic
*February 8, 2016*

**basic algebra**

marko's rate --- 1/x carlo's rate --- 1/y clyde's rate --- 1/z combined rate of all three = (xy + xz + yz)/(xyz) xyz/(xy + xz + yz) = 6 xyz = 6((xy + xz + yz) ** Carlo and Marko 1/(1/x + 1/y) = 8 xy/(x+y) = 8 xy = 8(x+y) *** clyde and marko 1/(1/x + 1/z) = 9 xz = 9...
*February 8, 2016*

**math**

projection of <-5,3) onto <1,4> = (-5+12)/√(1^2+4^2) = 7/√17 or 7√17/17
*February 8, 2016*

**Pre-cal**

short cut 4cis (7pi/6)*3cis(pi/3) = 12 cis(7π/6+π/3) , by De Moivre's theorem = 12cis(3π/2) but you wanted it in rectangular form = 12(cos 3π/2 + i sin 3π/2) = 12(0 - 1 i) = -12i long way (if you don't know the above law): 4cis (7pi/6) = 4(cos ...
*February 8, 2016*

**MATH PLZ HELP!!!!**

no area = (1/2)(height)(sum of parallel sides) = (1/2)(8)(22.5+9.5) = 128
*February 8, 2016*

**basic algebra**

tens digit --- x units digit -- x+6 the value of the number is 10x + x+6 = 11x + 6 11x = 2(x + x+6) + 8 11x = 4x + 14 7x=14 x=2 the number is 28
*February 8, 2016*

**Math**

1.-2v-7=-23 ---> correct A.)15 B.)8*** C.)-8 D.)-15 4.-2(m-30)=-6m ----> no A.)-15 B.)-13 C.)-8*** D.)8 -2m + 60 = -6m 4m = -60 m = -15 5.3n+2=8+2n ----- no A.)3 B.)4*** C.)5 D.)6 <----- 6.Simplify the expression. -----no -6-7(c+10) A.)64-7c B.)-76-7c C.)4-13c D.)-16-...
*February 8, 2016*

**math**

how about solving the proportion t/279 = 6/372
*February 8, 2016*

**basic algebra**

let the width of the cardboard be x then it's length is 17-x 2 inches cut off each dimensions leaves the base of the box to be x-4 and 17-x-4 x-4 and 13-x (x-4)^2 + (13-x)^2 = 49 x^2 - 8x + 16 + 169 - 26x + x^2 = 49 2x^2 - 34x + 136 = 0 x^2 - 17x + 68 = 0 x = (17 ±...
*February 8, 2016*

**basic algebra**

old fraction: (x-4)/x new fraction: 2(x-4)/(x-2) and then it said: (x-4)/x + 2(x-4)/(x-2) = 3 multiply each term by x(x-2) (x-4)(x-2) + 2(x)(x-4) = 3x(x-2) x^2 - 6x + 8 + 2x^2 - 8x = 3x^2 - 6x -8x = -8 x = 1 the fraction was -3/1 ??? new fraction = -6/-1 = 6 The original ...
*February 8, 2016*

**math**

well, how many numbers on a cube are less than 6 ??
*February 8, 2016*

**Probability**

If we add two evens, we get an even If we add two odds, we get an even If we add an even and an odd, we get an odd Let's look at this simplified scenario, of 4 numbers +1 . 2 .3 .4 1: 2 3 4 5 2: 3 4 5 6 3: 4 5 6 7 4: 5 6 7 8 clearly half the sum's are even, half are ...
*February 8, 2016*

**basic algebra**

smallest angle --- x middle sized -----y largest ---------x+y x + y + x+y = 180 x+y = 90 *** x-y = (2/3)(x+y) 3x - 3y = 2x + 2y x = 5y sub into *** 5y + y = 90 y = 15 x = 75 smallest = 15 middle sized = 75 largest = 90
*February 8, 2016*

**math**

number of boys --- 3x number of girls ---- 7x total campers = 10x after leaving: total campers = 10x-87 number of boys = 3x/2 number of girls = (8/10)(7x) = 28x/5 3x/2 + 28x/5 = 10x - 87 times 10 15x + 56x = 100x - 870 -29x = -870 x = 30 number of girls at start = 7x = 210 ...
*February 8, 2016*

**math**

using elimination: first one times two: 6x + 4y = -36 2nd one times three: -6x + 15y = -78 add them ... 19y = -114 y = -6 sub back into the original first ..... take over
*February 8, 2016*

**Math**

deductions = 12% + 17% + 3% = 32% leaving him with 68% of his salary what is .68(26965) ?
*February 7, 2016*

**Business**

PV = 3000(1.04)^-1 + 3000(1.04)^-2 = ...
*February 7, 2016*

**math**

Why use all those variables? let the weight of the command module be x now just translate the given English into Math "the service module weighed 3000 lbs less than 5 times the weight of the command module" ---> sm = 5x-3000 "The lunar module weighed 1000 lbs...
*February 7, 2016*

**math**

My goodness! All those words for such a simple problem. And you posted it about 4 times. Florist: Income per click = 1125/500 = $2.25 per click income = 2.25c , where c is then number of clicks Pizza place: income per click = 200/100 = $2.00 per click income = 2c , where c is ...
*February 7, 2016*

**Pre Algebra**

amount into CD --- x amount into Ed Account --- 2x+7000 x + 2x+7000 = 52000 all yours ...
*February 7, 2016*

**math**

nP5 = n!/(n-5)! your equation: n!/(n-5)! = 14n!/(n-4)! n!/(n-5)! = 14n!/(n-4)(n-5)! 1 = 14/(n-4) n-4 = 14 n = 18 check: my calculator says P(18,5) = 1028160 and P(18,4) = 73440 and 14(73440) = 1028160
*February 7, 2016*

**math 2**

centre is the midpoint of the diameter, so (4,0) equation: (x-4)^2 + y^2 = r^2 plug in (5,1) to find r^2 all done!
*February 7, 2016*

**maths**

For your AP term4 = a+3d = 6 ** term11=a+10d = 34 *** subtract them 7d = 28 d = 4 sub in ** a+12 = 6 a = -6 the AP is -6, -2, 2, 6, 10, ...
*February 7, 2016*

**pre-calclus**

I have a feeling that you have a typo and this is supposed to be either a sine or cosine function Assuming I am correct ..... for any sine function in the form: y = a sin (k(Ø + d)) + c |a| is the amplitude the period is 2π/k the phase shift is d units to the left...
*February 7, 2016*

**Precalc**

just use a simple ratio newtax/85000 = 1500/64000
*February 7, 2016*

**radicals**

Is that √8( √(9ab)/√(3b) + √(27a) ) or √8 { √(9ab)/ [√(3b) + √(27a) ] } furthermore, is it (√9)(ab) or √(9ab) ? same for the other square roots .
*February 7, 2016*

**math**

400(1+i)^2 = 480 (1+i)^2 = 1.2 1+i = 1.095445 i = .095445 new rate = .095445 + .02 = .115445 new amount = 400(1.115445)^2 = 497.69
*February 7, 2016*

**Math**

assuming that at t = 0 the height was zero (at ground level) Let's use a sine curve. The amplitude is 34 and the period is 2.5 seconds 2.5 = 2π/k k = π/1.25 so our basic curve is h = 34sin(πt/1.25) We need to raise this 34 cm so it doesn't go below road ...
*February 7, 2016*

**Math**

I answered the first question back in 2012 http://www.jiskha.com/display.cgi?id=1326819217 See if you can follow the same way for the 2nd question. The second question is actually easier Be sure to use 60 seconds for 1 minute at the end
*February 7, 2016*

**Math**

In any cyclic quad, the opposite angles are supplementary, that is, they add up to 180°
*February 7, 2016*

**Is444**

number of dimes --- x number of quarters -- x+10 number of nickels = 2(x+10) now for the "value": 10x + 25(x+10) + 5(2(x+10)) = 530 solve for x, then plug into my definitions.
*February 6, 2016*

**algebra**

dimes --- d nickels -- n equation dealing with number of coins: n+d = 28 n = 28-d equation dealing with the value of your coins: 10d + 5n = 195 divide by 5 2d + n = 39 sub in the other equation: 2d + 28-d = 39 d = 11 n = 28-11 = 17 She has 11 dimes and 17 nickels check: total...
*February 6, 2016*

**Math**

remember , two of the sides would be equal let the base be x let each of the equal sides by y x + 2y = 36 or x = 36-2y *** 5x + 2 = 3y 5x - 3y = -2 sub *** into this last equation 5(36-2y) - 3y = -2 180 - 10y - 3y = -2 -13y = -182 y = 14 then x = 36-28 = 8 the base is 8 and ...
*February 6, 2016*

**Calculus with Analytical Geometry**

Sorry, I was using the "Amount" formula should have been: PV = 3500( 1 - 1.06^-3)/.06 = 9355.54
*February 6, 2016*

**Calculus with Analytical Geometry**

PV = 3500( 1.06^3 - 1)/.06 = ...
*February 6, 2016*

**@sam - math**

Sam, it would have been nice if you had given bobpursley credit for his solution that you just cut-and-pasted. http://www.jiskha.com/display.cgi?id=1402557272
*February 6, 2016*

**math**

Assuming you know the relationship between distance, velocity and acceleration, v = at , no constant since at t=0 , v=0 d = (1/2)at^2 , no constant since at t=0, d = 0 but when t = 10, d = 500 (1/2)a(100) = 500 a = 10 acceleration is 10 m/s^2,
*February 6, 2016*

**math**

no, since the 6% is compounded quarterly you must divide .06 by 4 i = .06/4 = .015 so 350(1.015)^32 in the next one you would have to divide .06 by 12 to get i = .005 using the annuity formula 150( 1.005^n - 1)/.005 = 8000 (1.005^n -1)/.005 = 53.3333... 1.005^n - 1 = .26666...
*February 5, 2016*

**Math, Help me check my answers**

the last two are correct for the first one, complementary angles add up to 90°, so it is angle 4 and angle 5 You picked opposite angles.
*February 5, 2016*