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The question tells us the value of y which is -3x +5

So we can substitute that with y in the 2nd equation.

5x - 4y= -3

5x -4(-3x + 5) = -3

5x + 12x - 20 = 3

17x = 23

x= 17/23

Hope that helps! :)

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I'm pretty sure H is correct, as it's showing the same time at two different distances. It's not possible for one person to be at two different places at the same time. But thank you!

There are 40%*20 = 8 cars.  Let n be the number of card James adds.  Then

(8 + n)/(20) = 0.75

8 + n = 15

n = 7

James must add 7 cars.

See https://web2.0calc.com/questions/ep-melody-cphil-please-come

3 and 9 form a 180^o  angle   ....2 and 10 form a 120^o   angle      ......    you can finish....

Thank you so much!

When I first tried to do the slope I couldn't figure out how to exactly set it up. 

And the last answer is: Correct?!

Thank you for all your help!!

Thanks Chris,

I'll give it a go too :)

Say you want to simplify the fraction    \(\frac{10}{15}\)

what you need to look for is common factors for the top and bottom, the common factor here is 5

\(\frac{10}{15}=\frac{5*2}{5*3}\)

I can cancel out the common factor and I will be left with     \(\frac{2}{3}\)

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It works exactly the same there are letters involved.

\(\frac{9(x+y)}{9}=\frac{{9}*(x+y)}{9*1}=\frac{(x+y)}{1}=x+y\)

\(\frac{3t+6t^2}{3t}=\frac{3t*(1+2t)}{3t*1}=\frac{1+2t}{1}=1+2t\)

Qué es la mitad de 30 pero no 15? por favor ayúdame con esto....

Mi nombre es Alexis     

Hiciste tu pregunta en español, así que supongo que cambiar de idioma está bien.  

Entonces, quiero usar un lenguaje matemático diferente.  

Quiero usar la base-4.  En base-4, la mitad de 30 es 12.  

The Question tells us that that Type A produces 20% more pears than Type B. This means that Type A produces 120% of what Type B produces.

So if 144 is 120% then we can do:

144 ÷ 12/10 (we do this to find what 10/10 or 100% would be which is what Type B is)

144 x 10/12

1440/12

120

Therefore, Tree B produces 120 pears.

Hope that helps!!! :)

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no problem

-8z + 12= - 12

-8z= -12-12

-8z= -24

Because both are negative, we can just take them as positive

8z=24

z= 24/8

z=3

Hope that helps :)

🙃🙃👌

Here's  the  easy  way

Suppose we  have 

6q^2  + 12 q

__________

        2q

Since  we have addition on the top....we can  just   divide  this up  as

6q^2                12q

_____  +        _____   =

  2q                    2q

3q   +  6     !!!

Works the  same with subtraction

Be careful,though

We CANNOT   split   multiplication

6x^2                                                   6             x^2

____    does   NOT EQUAL            ____ *       ____

 2x                                                     2x             2x

Here....we  just  cancel  on top/bottom  =   3x

Hope that helps....

Good, it pleases me to hear that. 

thanks elijah

So as we can see, vertical angles are involved here. That means that x is equal to the angle opposite to it which means that x is 35 degrees

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'z' is just an unknown to solve for ...it could be 'x'

-8x + 12 = -12        subtract 12 from both sides

-8x = -24                divide both sides by -8

x = 3     (or z = 3)

Just a slight mistake  by Elijah but no biggie.....

(-2.5, -1.5)

Every  x  is in the domain  except the x  that  make the denominator   =   0 

This is   -1

So

Domain  is

-inf < x <  -1   U   -1 < x  <  inf

First term  =    2

100th  term   =    2 + 5(100 - 1)   =  2 + 5(99)   =   497

Sum  =

[first term  +  100th term ]   * ( number of terms)  / 2   =

[ 2  + 497  ]  / (100)  /2   =

499 *  50    = 

24950

(-2.5,1.5)

lets say the large is 100 oz and cost 100$

assuming this:

Small contains 50 oz

Medium contains 80 oz

Small costs 35$

Medium costs 70$

so to buy large you get 1 oz per $1.00

to buy medium you get 1 oz per $1.14

to buy large you get 1 oz per $1.43

Therfore LMS is correct

This just involves   setting up  a linear equation  like you  might  normally do

Let 1990   = 0     so  2001  =   11

Let  the  first point  be     ( 0, 105)   and  let the  second point  be  (11, 248)

Find  the slope between these points

[ 248 -105  ]  / [ 11  -  0  ]   = 143 /  11  =   13

This is the  slope of our  line and it indicates  that the  tuition  increases by $13  every year

So    using (0, 105)   the  equation is

C  = 13x + 105

2004  is  14  years  after 1990

So...just  calculate     13 (14)  + 205

For the second  one  just  solve this

352  =  13x + 205

Remember  that  the  x you  find  here is the  number of years AFTER 1990

If you  get  stuck...let  me  know....

Thank you!!

*face palm*  thank you, you always make it so much simpler.

Need to see the graph..........

The removal of the rectangles  does  not affect the  perimeter.......the firgure has exactly the same  perimeter as that  of the  square

So

4 (8n + 1)   <  1000

32n +  4  <  1000

32n  <  996

n  <  996   /  32  

n <  31 + 1/8

So    n  =   31