Answer:
The measure of angle BCD is
Step-by-step explanation:
step 1
Find the value of x
we know that
-----> form a straight line
substitute the values
step 2
Find the measure of angle BCD
substitute the value of x
on a map of the country club golf course, 0.5 in. represents 45 yd. how long is the 7th hole if the map shows 3 in
1 answer:
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Answer:
Step-by-step explanation:
A)
attached , I used g o o g l e draw.
B)
0.8 m = 80 cm =800 mm /50 = 16 mm
C)
bed = 4cm x 3cm
4cm*50= 200 cm = 2 m
3cm*50 = 150 cm = 1.5 m
Answer:
5 cm
Step-by-step explanation:
We khow that the altitude of this triangle is 1cm shorter than the base
- Let H be our altitude and B our base and A the area of the triangle
- A= (B*H)/2 ⇒ 15=(B*H)/2
- H is 1cm shorter than B ⇒ B=H+1
- H*(H+1)/2=15 ⇒ H*(H+1)=30⇒ H²+H=30⇒H²+H-30+0
that's a quadratic equation . Let's calculate the dicriminant .
Let Δ be the dicriminant
- a=1
- b=1
- c= -30
- Δ=b²-4*a*c = 1²-4*1*(-30)=1+4*30=121≥0
- Δ≥0⇔ that we have two solutions x and y
- x= (-1-
)/2= (-1-11)/2= -6
- y= (-1+
We have a negative value and a positive one
The altitude is a distance so it can't be negative
H= 5cm