6.70820393249936 i hope this helps
Answer:
x ≈ 77°, y = 103°
Step-by-step explanation:
Using the Sine rule in Δ BCD
= 
( cross- multiply )
2.9sinx° = 4sin45° ( divide both sides by 2.9 )
sinx° = 
, thus
x = 
( ) ≈ 77° ( to the nearest degree )
Since AC and DC are congruent then Δ ACD is isosceles.
Thus the base angles are congruent, that is
∠ ADC = ∠ CAD = y°
x and y are adjacent angles and supplementary, thus
x + y = 180, that is
77 + y = 180 ( subtract 77 from both sides )
y = 103°
Answer:
216 US dollars
Step-by-step explanation:
Let the amount he earned for babysitting be x
He spent 1/4 of x on guitar=(1/4)×x=1/4x
He gave 1/4 of x to charity= (1/4)×x=1/4x
Equation 1
Total amount left=(Total amount earned -Total amount spent)
Total amount earned=x
Total amount spent=(Spent on Guitar+Spent on Charity)=(1/4x)+(1/4x)=1/2x=0.5x
Total amount left=108 US dollars
Substituting in equation 1
108=(x-0,5x)
Solving
0.5x/0.5=108/0.5
x=216 US dollars
He started with 216 US dollars
Answ
BẠN GHI LẠI PT ĐI VÌ MÌNH THẤY PT B GỬI LÊN CÓ VẺ SAI THÌ PHẢI
Step-by-step explanation:
Answer:
The median.
Step-by-step explanation:
Mean is the average, if u add all the numbers including 175 and divide by 7, the answer is 30.
Median is the number in the middle, if u line all the numbers from smallest to largest, the middle number is 47. 47 > 30 which means that the median increases more
