Answer:
3/2 is the slope
Step-by-step explanation:
find the negative inverse to give the perpendicular slope
本题已由中国数学会官方解答（现有会员：3人）
Answer:
Water (H2O)
Step-by-step explanation:
When hydrocarbons undergo combustion reactions (I.e reactions with oxygen) carbon (iv) oxide and water are usually produced.
In this case, the only difference is the numbe of moles between the product and reactant
Equation of reaction;
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Reactants:
1. Ethane = C₂H₆
2. Oxygen = O₂
Product:
1. Carbon(iv) oxide = CO₂
2. Water = H₂O
Answer:
-176
Step-by-step explanation:
to evaluate this 8² - (3 +2 x 4²)
we shall first of all obey the BODMAS rule
Remeber that
B .................... bracket open
O.................... of
D...................... division
M................... .... multiplication
A....................... addition
S.........................subtraction
= 8² - (3 +2 x 4²)
= 8²- 3( 3+2 × 16)
= 64 - 3( 5 × 16)
= 64 -3(80)
= 64 - 240
= -176
Answer:
The mean of the test is 65
Step-by-step explanation:
Let the mean be x and SD be y
3 SD BELOW the mean means that we are taking away 3 SD FROM the mean
Mathematically, we have that as;
x - 3y = 41 •••••(i)
73 is 1 SD above mean
Mathematically;
x + y = 73 ••••••••(ii)
So let us solve both equations simultaneously
Simply multiply equation ii by 3 then add to i
x - 3y = 41
3x + 3y =219
4x = 41 + 219
4x = 260
x = 260/4
x = 65
