ANSWER
Option C and E
EXPLANATION
An arithmetic sequence has a constant difference among the consecutive terms.
The sequence

has a constant difference of -12.5

The sequence

also has a common difference of 16

Therefore correct answers are C and E
Answer:true
Step-by-step explanation:
It would be -6 which is less that -9
Answer:
38°
Step-by-step explanation:
Using the Cosine rule in Δ ABC
cos A = 
where a, b and c are the sides of the triangle.
Here a = 5, b = 3 and c = 7 , thus
cos A =
=
=
, thus
∠ A =
(
) ≈ 38°
SOLUTION - GIVEN = Sara has two bag with 60% & 28% peanut.
prove = How much the peanut is used to make 10 pound of 45%
peanut.
TO PROOF - Assume that
let x be the value of the peanut used by sara from the bag
60% peanut bag.
let ( 10 - x) be the value of peanut used by sara from 28% peanut
bag.
as given the bag become of the 10 pound which contain
45% of peanunt.
thus we have
0.60x + 0.28 ( 10 - x ) = 0.45 (10)
0.60x + 0.28 ( 10 -x ) = 4.5
0.60x + 2.8 - 0.28 x = 4.5
0.60x - 0.28x = 4.5 - 2.8
0.32x = 1.7
x = 5.3125 peanut is taken from the 60% bag.
& 4.6875 peanut from the 28% bag.