Given a (0,1,1) B (2, - 1,0) C (3,5,7) d (1,2,4), then the cosine of the angle between the line AB and the line CD is

Given a (0,1,1) B (2, - 1,0) C (3,5,7) d (1,2,4), then the cosine of the angle between the line AB and the line CD is

According to the question, ab (vector) = (2, - 2, - 1), CD (vector) = (- 2, - 3, - 3), then AB (vector) dot multiplied by CD (vector) = - 4 + 6 + 3 = 5, ab (vector) dot multiplied by CD (vector) = | ab | ×| CD | × cos Φ, | ab | = √ 5, | CD | = √ 22, so cos Φ = √ 110 / 22

(3 out of 4-36 out of 17-12 out of 7) × (- 36) seeking process seeking answer

=（27/36-17/36-21/36）*(-36)
=(-11/36)*(-36)
=11

Calculation: 1 + 316 + 5112 + 7120 + 9130 + 11142 + 13156 + 15172 + 17190

1+316+5112+7120+9130+11142+13156+15172+17190，=1+（3+16）+（5+112）+（7+120）+（9+130）+（11+142）+（13+156）+（15+172）+（17+190），=（1+3+5+7+9+11+13+15+17）+（16+112+120+130+142+156+172+190），=81+...

Three 5's and one 1's are added, subtracted, multiplied and divided. The result is twenty-four

5×(5-1÷5)=24

7. 3, - 7, - 3, the mixed operation is equal to 24
Be more detailed

7×[3+(-3)÷(-7)]=24
(-7)×[(-3)÷7-3)=24

What is the quotient of 3.8 minus 1.45 divided by 0.5?

(3.8-1.45)/0.5 = 4.7

What is the difference between the quotient of 6 / 5 divided by 12 and 1 / 3 of 18

Because it's division, not division,
12/（6/5）-18*1/3=12*5/6-6=10-6=4

What is 8 / 7 times 7 + 8 / 3?

8/7*7=8
8 + 8 / 3 = 10 and 2 / 3, that is 32 / 3
Or something like this:
8/7*(7+8/3)=232/21

How much is 400 square kilometers multiplied by 2 meters high?

0.8 cubic kilometers

How much is 909900 hundred 99 plus 13000 plus one times 10000

90990099+13000+1*10000 = 91 013 099