CPhill

y=-2.59x-6.42

y=1.74x-1.52

The solution is about (5.77, 8.51)

sin (x) = 0.34425

We can use the sine inverse for this......so we have

sin-1 ( 0.34425) = about 20.14 degrees      ...... or, since the sine is positive in the second quadrant, too....about 159.86 degrees

For the first one, D is correct.....an obtuse angle is > 90....but 9(6.8)+ 27 = 88.2

For the second one, we have

5x + 7(-4) ≥ 22    simplify

5x - 28 ≥ 22        add 28 to each side

5x ≥ 50               divide by 5 on both sides

x ≥ 10

So C is correct

The ones I get wrong???  That will be  { }  = empty set.....

Well...we'll see how it all turns out .......!!!!

-1.1x>-5.5    divide both sides by -1.1 and remember to reverse the inequality sign

x < 5

And in interval notation, we have

(-∞, 5 )

I hate the Pats....but they hardly ever lose at home......Pats    (I'll be pulling like heck for your Lions, happy7 !!)

Watch out for the Rams.....that defensive front is good.....St. Louis

I like the Cards, but agian, the Seahawks at home are tough  ......Seattle

I agree with the rest

Let the length be L..... then the width is 24 - L

And area = L * W  = L(24 - L)......and this equals 143

So we have

L(24-L) = 143

24L - L^2 = 143     rearranging, we have

L^2 - 24L + 143 = 0     factor

(L - 11)(L - 13) = 0  and setting each factor to 0....we have that L = 11cm or L = 13cm

And......depending upon how we orient the rectangle, the width either = 13cm or 11cm.

I don't like ND......I'm just picking them...

I don't trust the Wolverines to beat ANYONE......!!!

Hee's another possibility......

[(1 + 9) + (7 + 8) ] * [(6-5)+(4-3)]*2 =

[10 + 15] * [ (1) + (1)]*2 =

[25] * [2]*2 =

[25] * [4) =

100

P.S. - I still like yours better......