1)Solve 3+2(1x)>6 or 2x+14
26,132 results
Math check please
1. Solve the system of equations y=2x^23 y=3x1 a)no solution b)(1/2,5),(2,5/2) c)(1/2,5/2),(2,5)**** d)(1/2,5/2),(2,5) 2. How many real number solutions are there to the equation 0=3x^2+x4? a)0 ***** b)1 c)2 d)3 3.solve the equation by completing

How do I do this.?(Math.)
Use the Substitution method to solve the system of equations. y  2x = 5 3y  x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y  2x = 5 y = 2x  5 Now let's substitute 2x  5 for y in the second equation to solve for x:

maths
1.solve the set of linear equation by matrix method.a+3b+2c=3,2ab3c=8,5a+2b+c=9 solve for a,b,c 2.solve by Guassian elimination method, (a)a+2b+3c=5,3ab+2c=8,4a6b4c=2, (b)

Algebra
To solve the system of equations, which expression could be substituted for x into the first equation? 3x5y=14 x+4y=10 a)104y b)4y+10 c)(1/4)x+(5/2) d)(1/4)x+(5/2) I have another problem just like this one so if you could explain how to solve this one I

Math
Solve by eliminnation methods 2x4y=5 2x4y=6 solve the system by elimination method 5x+2y= 13 7x3y=17 Solve x+64 Determine whether the given numbers are solutions of the inequality 8,10,18,3 y8>2y3 Solve by the substitutioj method 2m+n=9 m5n=10

Math help please
1. Solve for x. 4(x  b) = x b = 4/3x b = 3/4x x = 4/3b x = 3/4b 2. Solve for y, then find the value of y when given x = 2. 6x = 7  4y 12 7/4 19/4 24 I need help solving these. Can you please explain how to solve these problems?

Math
Use your knowledge of exponents to solve. a) 1/2^x=1/(x+2) b) 1/2^x>1/x^2 So I know that these functions are rational functions.. and I am trying to solve for x. I tried to solve them by I keep getting stuck with the exponent 2 which is the exponential

algebra
solve for the indicated variable: a. temperature formula solve for F: K=5/9(F32)+273 b. annual interest rate solve for R: A=P+Prt

math
What is the first step in solving the linear system {2x − 3y = 11 {−x + 5y = −9 by the substitution method in the most efficient way? A. Solve the first equation for x. B. Solve the first equation for y. C. Solve the second equation for x. D. Solve

math
What is the first step in solving the linear system {2x−3y=11 {−x+5y=−9 by the substitution method in the most efficient way? A. Solve the first equation for x. B. Solve the first equation for y. C. Solve the second equation for x. D. Solve the

algebra
1. solve 2x + y = 7 for y 2. solve 2y  18x = 26 for y 3. solve 20x + 5y =15 for y 4. solve 9x  y = 45 for y 5. solve 6x  3y = 6 for y 6. solve 4x  5 = 7 + 4y for y

Algebra
Solve for x: h=(k/4)(x3L) Solve for B: v6Bxk=7B Solve for S: z+(1/7)sk=(1/6)yk^2 Solve for x: 3F=10hx+10hv+10xv

Math
Solve the system by addition or substitution. 3x – 4y = 8 6x – 2y = 10 Please get me on the correct track for 3x 4y =8 x=4, y=1 for 6x  2y =10 x= 2, y= 1 Solve one equation for x. 3x = 4y + 8 x = (4y + 8)/3 Insert that value for x in the other

math
Solve systems by substitution 5x  2y = 5 y  5x = 3 Substitute 5x + 3 for y in the first equation, and solve it for x. Once you have x, use either of the two equations you wrote to solve for y.

Math
1. Solve the equation. 6g = 42 a. g = 7 b. g = 7 c. g = 252 d. g = 252 2. Solve the equation. x/8 = 16 a. x = 128 b. x = 24 c. x = 8 d. x = 2 3. Solve the equation. 12m = 14.4 a. m = 120 b. m = 12 c. m = 1.2 d. m = 0.12 4. Solve the equation. x/3 = 15

equations & inequalities
1.simplify this expression 4p+9+(7p)+2=? a.3p+11 b.3p+7 {c.3p+11} d.11p+11 2.solve this equation 4y+228=352 a.y=31 {b.y=31} c.y=145 d.y=3 3.solve this inequality 3p16

Math
Factor the polynomial P(x)=x^32x^213x10. Then solve the equation P(x)=0. This is what I got: P(x)=(x+1)(x^23x10) P(x)=(x+1)(x5)(x+2) When it says solve the equation P(x)=0 does it means solve for x? If so then x=1 or 5 or 2 Correct??? please and

Algebra 2
would some one please check these for me 1. divide x^236y^2 over 5x^2+30y divide (x^26xy) A: x+6y over (5x)(x^2+6y) 2. Add. Express your answer in simplest form. 2x 0ver x^2+15x+54 + 4over x+6 A: 6 over x+9 3. solve: (9 over x5) 1= 8 over x+5 A: 10

math right triangle
the hypotenuse of a right triangle is 1 inch longer than one leg and 8 inches longer than the other. Find the length of each side of the triangle. Let l1, l2 be the legs. l1^2 + l2^2 = h^2 but h= l1+1 and h= l2 + 8 solve these for l1, l2, put them in the

Math
We have an important chemsitry test due and I want to make sure that I do not mess up on my algebra. I am dealing with the integrated rate law, but my question is purely algebraically in nature. I hope, somebody can help me. 1) ln(A) = kt+ln(B) solve for

math
actually, in a addition to the question i posted a few minutes ago, can someone please help me with a few actual specific questions? thanks so much i'm very confused and i've been working on these all day. *Literal Equations* ~solve for x ax + bx = 8ab

algebra
Solve the indicated variable: 1. Volume of a cone: solve for h: V=¨ir^2h/3 2. Temperature formula: solve for C: F=9/5C+32 pleaseeeee help me solve these! plzzz! i have nooo idea how to do these. THANKS! =)))

Alebra
Solve 5m  8 > 12 Solve 12  3a > 18 Solve 5m  4 < 2m + 11 Solve 2r  18 ≤ 5r + 3 Solve 26p  20 > 14p + 64 Can someone give me an example to one of these? I don't know how to do these.

algrebra
Iḿ doing a sensitivity analysis in the contants of the constraints 3+4y=40+h 2x+1y=20 2x+3y=60 I need to solve for x ....I know what to do later...I have to solve for y and then I have to solve for h in terms of X and Y.. so I just need you to help me

Intermediate Algebra
Combine like terms: 3x^2+2x4x^29+6x2x^2+8 Solve for x: 8x11= 11x+18 Solve for x: 2(x5)+7=z85x Solve for x: (x2)/5  3/2= (x+1)/10 Translate to an algebra statement; do not solve: Seven times the difference of six and a twice a number yields the

Math
I just don't understand this question: h(t)=A*b^x h(3)=4 h(5)=40 Solve for b Would you plug 3 into the x and set it equal to 4? (4=A*b^3) How would you solve for that because in the next question they go on to ask you to solve for A using the b you

MATH PLEASEEEEE
I have a question, if f(x)=x/2 and g(x)=3x+1 find: a) (f+g)(x) i know you go x/2+3x+1. but how do i solve that?? b) (fg)(x) i know you go x/23x+1, how do i solve? c)(f*g)(x) how do i solve? (f/g)(x) how do i solve?? f(g(x)) how do i solve?? thanks for

Algebra
There are 4 problems that I don't understand how to solve so, please help me. A numerical explanation with words explanation would be nice. Thank you tutors. Rewrite each equation so it is in the form ax + b = c or x + d/e = f, where x is a variable. Then

Math Analysis
6. Prove that f(x) = (3/4)x^4 + 2 and g(x) = (4sqrt(108x216))/3 are inverses. I know you solve it with composite functions f(g(x)) and g(f(x)), and I solved f(g(x)), but I can't seem to solve g(f(x)) to equal x, like it should. Can someone show me how to

Math  Algebra
Simplify and solve for x=2 and y=5. Please remember to group like terms. 1. 3x  2y + 4x 3y 2. y + x  y  x 1. 3x2  2x5 + 4x2  3x5 6  10 + 8  15 2. 5+252 75+2 yah i think that's how to solve it, basically sub in the x and ys and solve

Algebra
How do I solve this? ((1/t)  1)/ (t 1) NO CLUE :) :) :) :) :) :) :) :) :) :)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1 How do I solve this? ((1/t)  1)/ (t 1) 1/t  1 = 1/t  t/t = (1/t)(1  t) = (1/t)(t  1) The two t  1 terms cancel each

algebra
im trying to solve a literal equation, then solve the specific question first part is stumping me, im to solve for X ax=bxc this is what I got axbx=c, but don't know how to get x by itself

Algerbra
solve for x ac+x=xy have all terms with x on one side ac=xyx take x as common factor ac=x(y1) now solve for x 25a^2  9b^4 can u please help me solve and check these equations

Algebra 2
How do I solve these inequalities: e^3x>e^x1 6log (subscript of 4) x > 24 & how do I solve these: 8^x+1=3 e^x+2=50 8logx=16 I really don't understand how to solve these so can someone please explain them to me?

Calculus
How do you us implicit differentiation to solve x( y + 2 )^5 = 8 x( y + 2 )^5 = 8 ( y + 2 )^5 d/dx (x) + x d/dx(y+2)^5=d/dx 8 (y+2)^5 + 5x(y+2)^4 dy/dx=0 solve for dx/dy (Broken Link Removed) I assume you want dy/dx. Differentiate both sides of the

Algebra 2
How do I answer this f(x) = x  3 (x + 4)^(1/2) and am asked how to solve for x when y = 5 I have no idea how to do this and know that I could just solve it by guess and checking but I want to know how to do this algebraically when plugging in the 5 and

Algebra
Solve 3x +1 < 5 or 3x +1 > 4 By saying "solve," is it asking for me to show it on a line and in interval notation? Here's another: f(x) < 3 and f(x) > 4, where f(x) = 1/2x  7 I have no idea how to solve this! Please walk me through it! Thank you so much!

math
solve each equation for 0=/

algebra
solve for the indicated variable: a. temperature formula solve for F: K=5/9(F32)+273 b. annual interest rate solve for R: A=P+Prt im posting this the second time, but the first reply i got didn't help much :( can you show me how to do at least one of

Rational Zero Theorem
I know how to solve if the leading coefficient is 1, but how would i solve it if its not 1. Ex. f(x) = 2x^3 + 7x^2  7x + 30 Can someone help me start that out? Then I'll use synthetic divison to solve for it.

Math, Please Help! I don't understand!
I need help because I don't understand how to solve this equation. 37. x/a  1 = y/b for x So... does it mean solve for x? 39. V = 1/3 * pi * radius^2 * h for h So... does it mean solve for h? As you can see, I am really confused. Please help.

Algebra Problem
I've gotten confunsed. Please help. Solve: 2ya = a + 3b ____ ______, for y 3 4 Please show how to solve this. If you mean (2y a)/3 = (a + 3b)/4 then 2y  a = (3/4) (a + 3 b) 2y = (7/4) a + (9/4) b y = (7/8) a + (9/8) b f(x)=x(squared)4x+9 solve for x

Algebra
I'm having trouble with these problems, I'm not asking for just the answers, I need to know how to solve them, its a practice for my upcoming final, So I need to know how to do them. Name the property of real numbers illustrated. (2√7)*√3=2(√7*√3)

Algebra II
How do I solve the following problems?? 1. Factor: 4x^2100y^2 2. Factor: 3x^2+27 3. Solve 3x^2+9x=0 4. Solve 12^2+30x=12 5. 9a(a+1)=4 6. Solve 16x^2=25

Calculus  Seperable Equations
Solve the separable differential equation (dy/dx)=y(1+x) for y and find the exact value for y(.3). dy/dx = y(1+x) dy/y = (1+x)dx Integral (dy/y) = Integral (1+x)dx ln (y) = x + (1/2)x^2 + C y = e^(x + (1/2)x^2 + C) y(0.3) = e^(0.345 + C) I am stuck here.

calculus
I am suposed to apply L'Hospitals rule to solve. I can't seem to solve it tho. could someone explain the steps to me? Thanks! the limit as x approaches infinity of: xe^(1/x)x This is what I got so far: xe^(1/x)x x(e^(1/x)1) e^(1/x)1/(1/x) Now its in

Pre calculus
How do I solve this exponent problem? I understand the exponent rules, but I getting 1 but 1 is not the answer! I don't want anyone to solve the problem for me, I want to learn how to solve this type of problem. Thank you! Solve the equation: 8=36

algebra
how would i work out the following problems solve each formula in terms of the given variable 1. 5d2g=9 ;g The formula A=2h(l+w) gives the lateral area a of a rectangular solids with length l, width,w and height h. 2. solve this formula for h 3. solve

Algebra
FIND THE GCF OF THE PRODUCT (3B+6)(2B10) SOLVE... X^2=6X x(x+6)= 0 x = 6 or 0 it would = 0 help me solve this problem.. solve for W: 2L+2W=38 please and thank you!

MATH PLEASE HELP!
Solve each system 3x+2y= 2 9x y= 6 I know how to solve for x but i get really lost trying to figure out how to solve for the second variable

Algebra 2
Solve each system 3x+2y= 2 9x y= 6 I know how to solve for x but i get really lost trying to figure out how to solve for the second variable

algebra
I just need a quick check before I hand in my work if you would...Thanks. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6, 4)…Is this correct?

Algebra
91. Find the domain of: y=3x+1 a. all negative numbers b. x>0 c. all real numbers d. x=3 Can someone please show the work and how to solve this problem. There are many of these in my lessons and I don't understand how to solve them. Do you solve for x?

Math...
please help....Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. 108 is 36% of what number? Write and solve a proportion to solve the problem.

Business Math
a) Solve for x: 2x² + 5x = 3 b) Solve for x and y: x + y = 4 and x² + y² + xy  12 =0 c) Solve for x: 8 2x + 3 = ½x² d) Factorise: 6x²  7xy  3y² e) Factorise: 4x³ + 5x²y  4xy²  5y³

Algebra
I have some problems that I am having trouble with and I have some that need checking please. Thanks! Solve the equation. 4. (x+7/4)=2(x1/6) Find all the value(s) of x that make thedenominator(s) zero. Then solve the equation. 6. (x8/2x) +5= (x+6/x)

Algebra: Steve
I already asked this question,I just wanted to clarify the answer. Problem: The polynomial f(x) has degree 3. If f(1)=15, f(0)=0, f(1)=5, f(2)=12, then what are the xintercepts of the graph of f? Steve: clearly, f(0) = 0 so, f(x) = ax^3+bx^2+cx =

math 12
i got the wrong answer from the back, and i know that imnot dooing it right. please try to help me on this hard question. THE ANSWER WAS:16 solve the equation: 3log(x15)= (1/4)^x i don't know how to solve it algerbrically. the teacher doesn't want us to

Maths
solve the following pair of simultaneous equation: (x/a)+(y/b)=1 (x/b)+(y/a)=1 can someone help please?i have no idea how to solve it =( x/(ab) + y/b^2 = 1/b x/(ab) + y/a^2 = 1/a Subtract one from the other y(1/b^2  1/a^2) = 1/b  1/a y(1/b + 1/a)(1/b 

math
solve the following trig equation : 7 = 8sin(1/2)x. I can solve this using the halfangle indentity. But i need to solve this using period and phase change equation. how do i do this?

Algebra 1Please, help me!
Solve the following equation by graphing the related function. 1. 4x^2 + 8x = 32 A: ? Use the Zero Product Property to solve the following equation. 2. x(x + 3) = 32 A: ? 3. Solve 3x^2 + 5 = 21. Round to the nearest hundredth. A: x = 5.33 x = 5.0 or 5?

Math Algebra
hi wat method would i use and how would i solve this system of equations x^2+xy=3 3x^2+2xy2y^2=7 In your first equation, solve for y... you should have xy= x^2+3... divide this by x... so y = x^2+3/x plug what you solved for y into your second equation

Calc
how do I solve this arcsin(4/5) note that I am not looking for about 53 degrees I believe I'm suppose to solve euler's formula for x i.e. sin (x) = (e^(ix)  e^(ix))/(2i) where x is in radians hence I would do something like this sin (x) = (e^(ix) 

math
I have a linear equation problem I am trying to solve that has fractions in it  (x  2)/5  (x  4)/2 = 2 To solve, I first find the lcd which is 10, then multiply everything by 10, so: 10(x  2)/5  10(x  4)/2 = 2 * 10 This comes out to be: 2(x  2) 

math
uhm basically this is the part 2 of applications of percent quiz (GA connections academy) 108 is 36% of what number? write and solve a proportion to solve the problem 72 is what percent of 480? write and solve an equation to solve the problem Explain how

TO DRWLS/MATH HELP PLEASE
How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 yz=3 2x+3y+z=1 THE ANSWERS ARE X=3,Y=2,Z=1 i KNOW THE ANSWERS I JUST DON'T KNOW HOW THE BOOK GOT THE ANSWERS . i 'VE TRIED MANY DIFFERENT WAYS AND I STILL

algebra
i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y  1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 +

PreAlgebra
Can someone please show me how to solve these problems stepbystep so that I can understand how to do them? 1.Use inverse operations to write a related inequality and solve for the variable: d/6 < 12 2.Use inverse operations to solve the inequality:

math
I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them. 17. Solve the equation using the zero product property... 8n(5n+3) 19. Solve the equation by factoring 5z^22z3=0 20. Solve the equation by

Math
I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them. 17. Solve the equation using the zero product property... 8n(5n+3) 19. Solve the equation by factoring 5z^22z3=0 20. Solve the equation by

math
please anwer these: 1) how can i multiply and divide polynomials containing radicals? 2) how can i solve radical equations? 3) how can i solve qudratic equations by factoring ? 4) how can i solve quadratic equations graphically ? thank you !!!!!

Math
I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them. 17. Solve the equation using the zero product property... 8n(5n+3) 19. Solve the equation by factoring 5z^22z3=0 20. Solve the equation by

Precalc
I have a couple questions, I need to know how to solve these type of problems. X^2 4< X + 16 5/n+2  5/n = 2/3n 2X^3x^26X + 1/ X^2 + 5x  8 1) rearragne the terms to get x^2x20

Algebra 2(check) cont..
1)solve the inequality 3(r11)+15>_9 my answer = r

math
could someone please help. given each set of data for ∆ABC: a) solve for b given ∠B=88 degrees,a=31.5m,c=25.6cm b) solve for a given ∠B=66 degrees,∠C=28 degrees,c=11.6cm i) state whether the sine law or cosine law is required to solve the unknown

Math
Hello! I am studying for an upcoming math test and I'm trying to figure out how to solve this equation: Select the expression that is equivalent to (m^2  25). A. (m^2  10m + 25) B. (m^2 + 10m + 25) C. (m  5) (m + 5) D. (m  5)^2 I do NOT want the answer

math
just an algebra question. how would you solve: (3x^2 +5)(3x^2 +5) ^ means power :] Since you have not given us an equation, it is impossible to "solve" your problam. Please repost with the complete equation, so we can help you. I hope this helps a little.

English
1. He can not solve the math problem. 2. He cannot solve the math problem. 3. He can't solve the math problem. 4. He could not solve the math problem. 5. He couldnot solve the math problem. 6. He couldn't solve the math problem. (Are they all grammatical?

Trig
h t t p : / / m a t h c e n t r a l . u r e g i n a . c a / Q Q / d a t a b a s e / Q Q . 0 9 . 9 9 / a n g e l a 2 . 2 . g i f give that picture how do I solve for (h) I know that you you From the diagram tan(3.5) = h/(13 + x) and tan(9) = h/x. Solve the

Math
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. 108 is 36% of what number? Write and solve a proportion to solve the problem. Note: Enter your answer and show all the steps that you use to solve this

Trigonometry
Hi, I really need help in understanding how to solve trig equations. How do you solve this equation? Solve the equation on the interval 0 < or equal to x < or equal to 2pi. sinx = (square root of 3)/2 I appreciate your help. Thank you!

Substitution MethodPlz help
Use the Substitution method to solve the system of equations. x + y = 4 x  y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=4 (y+2) + y = 4 solve for y. Then, x= y+2 i don't get it.How did you get that?What

Physics/Science
A startled armadillo leaps upward rising 0.547 m in the first 0.202 s. (a) What is its initial speed as it leaves the ground? _____m/s (b) What is its speed at the height of 0.547 m? _____m/s (c) How much higher does it go? _____m Use distance vs time:

ALGEBRA 1!PLZ HELP!
Use the Substitution method to solve the system of equations. y  2x = 5 3y  x = 5 Solve the first equation for y. y = 2x5 Substitute that for y in the second equation and solve for x. Then use the value of x to substitute back into the first equation

Algebra
Solving quardratic equations using factoring. 2X^2+2X4=0 The book says the answer is 2,1. I got the 2,1 but not in the order of 2,1. I used FOIL to solve. When I use 2,1 I don't can not solve. When I use 1,2. I can solve. I am not clear.

math
solve for the indicated variable: a. temperature formula solve for F: K=5/9(F32)+273 b. annual interest rate solve for R: A=P+Prt can you please show how to do these? thanxx =)

Algebra1!Plz help I have test 2morrow!!!
so would the new eqaution be... 2x+8=10 then.. 2x=2 x=1? We know that y = x + 8. So if x + y = 10, then x + x + 8 = 10. but what about the y?ANd what do I do afetr that? If you know what x equals, then you can calculate what y equals. Once you've solved

Need all the help i can get
Hi i'm pretty new to this and i don't know what to do?So i put these questions up im not sure if my answers will show up because i used color letters, but i need help checking and explaining steps N 108 is 36% of what number? Write and solve a proportion

Algebra
Simplify this expression (DO NOT solve for x) 5x+6(x+2)8(x3) I have no clue, can someone tell me how to solve it? Please don't tell me the answer, only how to solve it. Thanks :D

subsitution method
Can some one show me how to use the Substitution method to solve the system of these equations. x + y = 4 x  y = 2 x + y = 10 y = x + 8 on the first set. Solve for either x or y in either equation, then put that value into the other equation. Example: x

Math
Solve for S: r^2s5s=7. Solve for b: L= 4a^2b. I'm confused about how to solve these problems. Could someone show me the steps?

Math
HOW WOULD I SOLVE SOMETHING LIKE THIS, IT IS AN EXAMPLE I MADE UP. ITS SIMILAR TO THE ONE I HAVE. I DON'T GET IT. THERE ARE TWO UNKNOW VARILABLES AND SOME NUMBERS. HOW DO I POSSIBLE SOLVE THIS. MAYBE I DON'T HAVE TO SOLVE ANYTHING THAT IS WHAT I WAS

math
Eight subtracted from six times a number is 134. What is the number? A) Translate the statement above into an equation that you can solve to answer this question. Do not solve it yet. Use x as your variable. solve for x

Help, Math.
Solve: 3e2x + 2 = 50 a. ln 8 b. ln 0.25 c. ln 14 d. 0.5ln 16  Solve: 1 = 7 ex a. ln 1/7 b. ln 1/7 c. ln 7 d. ln 7  Solve: e3x = 8 a. ln 5 b. 3 ln 8 c. ln 8 3 d. ln 3 8  ln 1 √ e a. √e b. 1 2 c. 1 e d. 1 2

Algebra
Ok, I am horrible at math so I am going to need someone's help..... 1. Solve. x+3

math
1. solve by using the quadratic formula. 5x^2+x=3 2. solve by completing the square. x^2=5x+2 3.solve by using the square roots method. 5(x2)^2=3

Algebra 1 Inequalities (help)
So, I'm kinda confused, How would I solve 1c < 400, I'm trying to go back, and practice my Inequalities, and I kinda forgot how exactly to solve them.... And I don't want to give any of my actual problems so I just created this one off the top of my head,

MATH HELP PLEASE
Bill has 30 coins, some nickels some dimes. They equal $2.10. How many nickels are there? What is the equasion used to solve this problem? When I solve it, I get 4.3 nickels, but how can there be .3? Please help me solve I posted the two equations for this

Math
1) Solve: 8x ¨C (6x + 4) = 8 x = 2 2) 7x > 1/15 the solution set is: {x  x > 105} 3) Solve 5> 4x + 4 or 10 ¡Ü 4x +3 the solution to the inequality is: [¡Þ, 7/4] U [1/4,¡Þ] 4) Use < or > to make the statement true: 9 < 3 5) Graph the

Matrh
How do you solve this problem? The avera&e (aritmeticmean)of x and y is 5 and the avera&e of x, y, and z is 8. What is the value of z? (a)19 (b)14 (c)13 (d)11 (e)3 I solved it by addin 8+5=13 So I chose (c)13. But it's wron& and the answer is (b)14. How