The answers are (-3,-12), (-2,-10), (5,4)
<h2>Answer:</h2>
[1] Area of base = 13 × 13 = 169in².
Area of faces = 4 (1/2 × 13 × 8) = 208in².
Surface area = (169 + 208)in² = 377in².
[2] Area of base = 1/2 × 5.2 × 4.5 = 11.7in².
Area of faces = 3 (√3/4 × 5.2²) = 35.1in².
Surface area = (35.1 + 11.7)in² = 46.8in².
[3] Area of base = 7 × 10 = 70in².
Area of faces = 2(1/2 × 7 × 6) + 2(1/2 × 10 × 4.8)
= 98in².
Surface area = (70 + 98)in² = 168in².
Answer:
-3
Hope this helps :)
Have a great day !
5INGH
Step-by-step explanation:
![-5\frac{1}{2} - 4\frac{1}{4} +6 \frac{3}{4} = -5\frac{2}{4} - 4\frac{1}{4} +6 \frac{3}{4} = -9\frac{3}{4} +6\frac{3}{4}=-3](https://tex.z-dn.net/?f=-5%5Cfrac%7B1%7D%7B2%7D%20-%204%5Cfrac%7B1%7D%7B4%7D%20%2B6%20%5Cfrac%7B3%7D%7B4%7D%20%3D%20-5%5Cfrac%7B2%7D%7B4%7D%20-%204%5Cfrac%7B1%7D%7B4%7D%20%2B6%20%5Cfrac%7B3%7D%7B4%7D%20%3D%20-9%5Cfrac%7B3%7D%7B4%7D%20%2B6%5Cfrac%7B3%7D%7B4%7D%3D-3)
First, you need to figure out hoe many boys and girls there are.
40% = 0.4
0.4 x 20 = 8 boys
20 - 8 = 12 girls
25% of the boys have glasses
0.25 x 8 = 2 boys who wear glasses
50% of the girls have glasses
0.5 x 12 = 6 girls who wear glasses
2 + 6 = 8
8 students wear glasses