Answer:
30
Step-by-step explanation:
For a = <xa, ya> and b = <xb, yb>, the dot product is the sum of products ...
a·b = (xa)(xb) + (ya)(yb)
Substituting the given information, you have ...
a·b = 5·4 + 2·5 = 20 + 10
a·b = 30
_____
Some graphing calculators can do such math. There are also dot product calculators available on the Internet. If you have quite a few of these to calculate, you can put the appropriate formula into a spreadsheet.
The answer is 12 becasue you’re trying to find the leg
11 = -3k - 22 - 8k....combine like terms on the right side
11 = -11k - 22 ...add 22 to both sides
11 + 22 = -11k
33 = -11k....divide both sides by -11
-33/11 = k
-3 = k <===
Answer:
9
Step-by-step explanation:
(15×4+3)/4 ÷(4×1+3)/4= 63/4 ÷ 7/4= 9
