7(x+4)=0
7x+28=0
7x=-28
X=-28/7
X=-4
Answer:
D would be the answer
Step-by-step explanation:
Answer:
The first angle is the smallest
Step-by-step explanation:
Step one:
given data
Angle 1= x+37
Angle 2= 90
angle 3= x+67
We know that the sum of angle in a triangle is 180
so
x+3+90+x+67= 180
collect like terms
2x+160= 180
2x=180-160
2x= 20
divide both sides by 2
x= 10
Step two:
so
Angle 1= 10+37= 47 °
Angle 2= 90= 90
angle 3= 10+67= 77 °
Answer:
76.4 m
Step-by-step explanation:
The race track has two straights and two semi circles.
Each straight is 80m
total perimeter for the straights is 80 * 2 = 160m
two semi circles which creates a full circle
perimeter of a full circle =
d
NB : (d) is the diameter
therefore we can find the value of the diameter
400 = 160 +
d
400- 160 =
d
240 =
d
d = 240/
d = 76.394.....
<u>d = 76.4 m</u>