The expression that show the amount of money that Marvin has after his purchase is 400 - (4d + 12r + 8c)
Amount with Martin = $40
Since he buys 4<em> dolls</em> for d dollars each, 12 <em>race cars</em> for r dollars each, and 8 coloring books for c dollars each, the total value will be:
= (4 × d) + (12 × r) + (8 × c)
= 4d + 12r + 8c
Therefore, the expression that show the amount of money that Marvin has after his purchase will be:
= 400 - (4d + 12r + 8c)
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Step-by-step explanation:
law of cosine :
c² = a² + b² - 2ab×cos(C)
with c being the side opposite of C.
so, in our case
3² = 3² + 3²×3 - 2×3×3×sqrt(3)×cos(A)
0 = 3²×3 - 18×sqrt(3)×cos(A)
27 = 18×sqrt(3)×cos(A)
cos(A) = 27/(18×sqrt(3)) = 3/(2×sqrt(3)) =
= 0.866025404...
A = 30°
FYI : since it is an isoceles triangle, C = A = 30°.
and therefore B = 180 - 30 - 30 = 120°.
as the sum of all angles in a triangle is always 180°.
Answer:
B
Step-by-step explanation:
CosA = AB/AC = 12/20 = 3/5
Step-by-step explanation:
345x19=467 that's it good luck
Answer:
Price after sale: $4.04
$0.71 saved
Step-by-step explanation:
