First write the question:
3a^2 + 4b^2
Substitute:
3 x (2^2) + 4 x (3^2)
Simplify:
(3 x 4) + (4 x 9)
Simplify again:
12 + 36
Answer:
48
Hope it helped :)
5k-3+9+k=180
6k+6=180
6k=174
k= 174/6= 29
2(180-2h)+40=180
360-4h=140
4h=360-140=220
h=55
Answer:
20-d= x
d= money spent
x= money left
Step-by-step explanation:
Answer:
Step-by-step explanation:
The sides of a 30-60-90 triangle are in the ratio 1:√3:2
The side opposite the 30° angle is (12√6)÷2 = 6/√6.
The side opposite the 60° angle is √3×6/√6 = 6/√2 =3√2.
The sides of a 45-45-90 triangle are in the ratio 1:1:√2
The hypotenuse is 3√2, so the side opposite the 45° angle is 3.
x = 3
Answer:
cos A = 12/13 = 0.9231
(angle A = 22.62°)
Step-by-step explanation:
cos A = 12/13 = 0.9231