Answer:
A -60i - 14j
Step-by-step explanation:
u = -9i + 8j
v = 7i + 5j
2u = 2(-9i + 8j) = -18i + 16j
6v = 6(7i + 5j) = 42i + 30j
2u - 6v
(-18i + 16j) - (42i + 30j)
(-18i - 42i) + (16j-30j)
-60i - 14j
Answer:
a)35 cubic meters=35000 liters.
b)450 cubic centimeters= 450 milliliters.
c)19.74 cubic meters=19740 cubic decimeters.
d)926 cubic centimeters=0.926 cubic decimeters.
Step-by-step explanation:
a) since one cubic meter = 1000 liters,
35 cubic meters=35 X 1000=35000 liters
b) Since one cubic centimeters=1 milliliter,
450 cubic centimeters=450 milliliters.
c)Since one meter = 10 decimeters, one cubic meter=10³ decimeters.
Hence 19.74 cubic meters=
cubic decimeters.
d) Since once centimeter=0.1 decimeter, 1 cubic centimeter=0.1³ decimeters.
Hence 926 cubic centimeters=
cubic decimeters.
Answer:
94
Step-by-step explanation:
Average = Total / Number of Data

You have a total of 280 points after 4 quizzes.
4+4=8 quizzes in total
Total you need for average to be 82

Number of points you need to hit required:

You need 376 points in total for the next 4 quizzes.

You need an average of 94 points on the next 4 quizzes.
Answer: c) -4
Step-by-step explanation:
Get the variables on one side of 3x+y=-2x+8 and the constants on another side:
3x+y=-2x+8
(3x+y)+2x=(-2x+8)+2x
5x+y=8
Now, multiply 5x+y=8 by -2:
-2(5x+y=8)
-10x-2y=-16
Add this equation to -3x+2y=-10:
(-10x-2y=-16)+(-3x+2y=-10)
-13x=-26
x=2
Plug x=2 into -3x+2y=-10:
-3(2)+2y=-10
-6+2y=-10
2y=-4
y=-2
Therefore, (2, -2) is the solution to the system of equations, so xy=(2)(-2)=-4
2 in : 4 ft
Convert to like units
2 in : 48 in
Reduce and drop the units
1 : 24