Answer:
19.34cm
Step-by-step explanation:
Rigth Angled triangle
use SOHCAHTOA
Cos°=adj/hyp
Cos 71=6.3/BC
BC=6.3/COS 71
COS 71°= 0.3256
BC=6.3/0.3256
BC= 19.34cm
Answer:
y= -3
Step-by-step explanation:
(-7/2)y =21/2
Divide both sides by (-7/2) = Multiply by (-2/7)
On the left side ,after cancellation you have only y
On the right side you multiply 21/2 by (-2/7)
y= (21*-2) / 2*7
y=(-42)/14
y=(-21)/7
y=- 3
check:
-(7/2) of- 3 is 10.5 21/2=10.5
Answer:
Step-by-step explanation:
To solve this exercise you need to remember the following properties:
1. The Distributive property states that:
2. The Addition property of Equality statest that:
If , then
3. The Subtraction property of Equality statest that:
If , then
4. The Division property of Equality statest that:
If , then
5. The Multiplication property of Equality statest that:
If , then
Given the equation:
You must solve for "g" in order to find its value:
- Apply the Distributive property:
- Apply the Addition property of Equality adding 30 to both sides of the equation:
- Apply the Division property of Equality dividing both sides by 2:
Answer:
2/3
Step-by-step explanation:
Given that:
Number of students = 80
Number of parents = 40
fraction of the ratio of students to the total number of people at the graduation
Total number of people at graduation =. (number of students + number of parents)
80 + 40 = 120
Number of students : total people
80 : 120
80/120 = 8/12 = 2/3
2/3x-1/5=x-1
Add similar elements 23x-15=8x
Subtract x from both sides 8x-x=x-1-x
Simply 7x=-x
Divide both sides by 7 7x = -1
__ __. *Simply: x=-1/7
7 7