Answer:
It's the law of cosines
Step-by-step explanation:
law of cosines states that 
so we know that a = 7, b = 4, and alpha would be 135 degrees, so just plugging it in gets us 49+16-2*7*4*(-0.707) = 65 + 39.59 = 104.59
Well, let us figure out what the first store will cost.
40*6.95=278
Now for the second store
325*0.8=260
So the first store is $278, while the second store is $260, so Elisa should buy shirts from the second store
it is b -30 plz give me brainlist
13 cm long is PQ in parallelogram .
What does parallelogram mean in a nutshell?
- A parallelogram is a geometric shape with parallel sides that exists in two dimensions.
- The pair of parallel sides in this sort of polygon with four sides, also known as a quadrilateral, are of equal length.
- In a parallelogram, the sum of the adjacent angles is 180 degrees.
Perimeter of ∥gm = - 40 cm
2(PQ+ PS) = - 40
2 ( PQ + 7 ) = 40
PQ + 7 = 20
PQ = 20 - 7
PQ = 13 cm
Learn more about parallelogram
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Answer:
−7(x + 3) + 8(1 + 8x)=57x - 13
Step-by-step explanation:
