Answer:
1. y = 12
x = 7.9
2. AB = 5
AC = 5√3
Step-by-step explanation:
1. If you call the straight up line of both triangles is z, then
(9 + 7)^2 = y^2 + z^2
=> z^2 = 256 - y^2
x^2 + 7^2 = z^2
=> z^2 = x^2 + 49
so 256 - y^2 = x^2 + 49
x^2 = 207 - y^2
for the left smaller triangle: 9^2 + x^2 = y^2
y^2 = x^2 + 81
Substitute:
y^2 = (207 - y^2) + 81
2y^2 = 288
y^2 = 144
y = 12
x^2 = 207 - y^2 = 207 - 144 = 63
x = 7.9
2. Sin(30) = AB/BC
=> AB = BC x sin(30) = 10 x 0.5 = 5
Cos(30) = AC/BC
=> AC = BC x cos(30) = 10 x √3/2 = 5√3
Answer:
8 weeks
Step-by-step explanation:
Given data
Matteo
Amount= $400
Spending per week= $10
Hence his balance after x weeks is given as
y=400-10x-------------1
Luca
Amount= $200
Spending per week= $15
Hence his balance after x weeks is given as
y=200+15x-------------2
Equate 1 and 2
400-10x=200+15x
collect like terms
400-200=15x+10x
200=25x
x= 200/25
x= 8 weeks
Hence it will take 8 weeks
Answer:
70%
Step-by-step explanation:
49/70 = 0.7
0.7*100 = 70
Answer:
C'est question pas difficile