10+10=20 = length
20 + 18 = 38 width = 18 or 9 on each side
10 x 9 = 90
Answer 90
Answer:
1. 8.4 2. 15
Step-by-step explanation:
1. 4x+8y= 40
wen y= 0.8
4x+8×0.8=40
4x=40-8×0.8
4x= 40- 6.4= 33.6
....x= 33.6/4 = 8.4
2. 3a+b= 54
wen b= 9
3a+ 9= 54
3a= 54- 9
3a=45
.....a = 45/3 = 15
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Since the two angles that you have are vertical angles, we know that vertical angles are congruent, so you have to set them to equal each other.
x+24=5x-36
-4x+24=-36
-4x=-60
x=15
We now have the value of x so now we plug it in for each expression of each angle.
x+24=?
15+24=39
5x-36=?
5(15)-36=?
75-36=39
14*sin(60°) = 7√3 ≈ 12.124 . . . is the altitude