Answer: B
Step-by-step explanation:
Perimeter = 2(length+width)
'CD' = 20×cos(30) = 17.3205
width 'AD' = 20×cos(60) = 10
Perimeter = 2(17.3205+10)
= 2(27.3205)
= 54.641 =54.6
Answer:
10 and 14
Step-by-step explanation:
Let the first number be x and the second number be y, then
x + 18 = 2y → (1)
y + 16 = 3x → (2)
Rearrange (1) expressing x in terms of y by subtracting 18 from both sides
x = 2y - 18 → (3)
Substitute x = 2y - 18 into (2)
y + 16 = 3(2y - 18) ← distribute
y + 16 = 6y - 54 ( subtract 6y from both sides )
- 5y + 16 = - 54 ( subtract 16 from both sides )
- 5y = - 70 ( divide both sides by - 5 )
y = 14
Substitute y = 14 into (3) for corresponding value of x
x = (2 × 14) - 18 = 28 - 18 = 10
The 2 numbers are 10 and 14
The simplified version of this expression is -4x.
Work
1. 1x-7x-(-2x)
2. 1x-7x+2x
Now just combine the terms.
3. -6x+2x
4. -4x
A sign has 64 rows<span> of </span>lights<span> with </span>128 lights<span> in </span>each row<span>. How </span>many lights<span> are on - 685853. ... on the </span>sign<span>? </span>Choose exactly two answers<span> that are </span>correct<span>. A. </span>multiplication B<span>. </span>division C<span>. </span>2 D<span>. </span>8,192<span>. 1 ... </span>128 light each<span>. (or </span>128 rows<span> with </span>64 light each<span>) so per </span>each row<span> there are </span>128<span> so </span>64<span>* </span>128<span>give the total </span>answer.<span>A </span>sign has 64 rows<span> of </span>lights<span> with </span>128 lights<span> in </span>each row<span>. How </span>many lights<span> are on - 685853. ... on the </span>sign<span>? </span>Choose exactly two answers<span> that are </span>correct<span>. A. </span>multiplication B<span>. </span>division C<span>. </span>2 D<span>. </span>8,192<span>. 1 ... </span>128 light each<span>. (or </span>128 rows<span> with </span>64 light each<span>) so per </span>each row<span> there are </span>128<span> so </span>64<span>* </span>128<span>give the total </span>answer<span>.</span>