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
The length of the pencil would be 17. This could be easily found by using a^2 + b^2 = c^2. Please mark me brainliest it would be pretty cash money of you
Answer:
Subtraction
Step-by-step explanation:
Subtraction
153 - 45 = g + 45 - 45
108 = g
volume = 7*7*2 = 49*2=98
she needs to get 98 cubic feet of sand