10d+5n=220
divide both sides by 5
2d+n=44
d=13+n
sub 13+n for d in other equatin
2(13+n)+n=44
26+2n+n=44
26+3n=44
minus 26 both sides
3n=18
divide both sides by 3
n=6
sub back
d=13+n
d=13+6
d=19
19 dimes
6 nickles
Answer:
The value of
is 10º.
Step-by-step explanation:
From Euclidean Geometry we remember that the sum of internal angles within a triangle equals to 180º. We present the resulting triangle after applying some geometric handling in the image attached below. Then, the triangle satisfies the following equation:
(1)


The value of
is 10º.
1. 8a+a^2-10
2. v-6w
3. -2c^2+4c
4. z^3+8z^2+5z+7
Is there a picture? I cannot answer without a picture
X+x²=30
x²+x-30=0
(x+6)(x-5)=0
x=-6 or x=5