Answer:
34⁰
Step-by-step explanation:
let unknown angle be x
cos x=19/23
cos x=0.826
x=cos inverse of 0.826
x=34.3⁰
X=number of girls.
y=number of boys.
We can suggest this system of equations:
2/7 x=3/5 y ⇒10x=21y ⇒x=21/10 y
y=x-165
We can solve this problem by substitution method:
x=(21/10)(x-165)
10x=21x-3465
10x-21x=-3465
-11x=-3465
x=-3465 /-11=315
y=x-165=315-165=150
Number of children=number of girls + number of boys
Number of children=315 +150=465
Answer: there were 465 children at the festival.
Answer:
65
Step-by-step explanation:
The supplement of 65° is the angle that when added to 65° forms a straight angle (180° ).
30 x 60
Step-by-step explanation:
the length of the perimeter would be 180, subtract 60ft for the fencing replaced by the wall and you meet the maximum 120ft
30X60 gives you the largest area with 1800ft^2
Start. With 4 divided by 5. =. .80. They cost 80 cents an ounce.
The second part is 1 divided by .80. = 1.25 ounces.
