PLEASPLEPALEPALSEPALSE HELPPPPPPPPPPPP

Answers

Answer 1

Answer: i think it line b but i am so sorry if it is wrong

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1 pair of opposite sides that are parallel

Answers

a trapezoid has only 1 pair of parallel sides the other 2 sides will join at some point the other 2 sides will never touch so they are parallel.

Hope that helps.

What is the answer to 1/2 of 1/5?

Answers

'of' can be translated to as multiply for fractions so
1/2 times 1/5=1/10

The answer is 0.1 , hope that helps :)

Divide mentally.

1.2 ÷ 3,000 = ?

Answers

It would equal 0.0004.

0.0004 is the answer.

Sarah purchased a set of art supplies for $20.90 and a pair of jeans for $18.95.The sales tax rate in the state is 7%.How much change did Sarah receive from $50

Answers

Total purchase she did : $20.90+$18.95=$39.85
7% tax means that we have to 7% or (7/100) extra
7% X 39.85= 2.79
total pay: 39.85+2.79=42.64
total cash: $50
what she gets back: 50-42.64=7.36

Verify the identity tan x + cot x / tan x - cot x = 1/ sin^2x - cos^2x

Answers

$(\tan x+\cot x)/(\tan x-\cot x)=(1)/(\sin^2x-\cos^2x)\n\n\text{use}\ \tan x=(\sin x)/(\cos x),\ \cot x=(\cos x)/(\sin x)\n\n\tan x+\cot x=(\sin x)/(\cos x)+(\cos x)/(\sin x)=(\sin x\cdot\sin x)/(\sin x\cos x)+(\cos x\cdot\cos x)/(\sin x\cos x)\n\n=(\sin^2x+\cos^2x)/(\sin x\cos x)\n\n\text{use}\ \sin^2x+\cos^2x=1\n\n=(1)/(\sin x\cos x)\n\n\tan x-\cot x=(\sin x)/(\cos x)-(\cos x)/(\sin x)=(\sin^2x-\cos^2x)/(\sin x\cos x)$

$L_s=(\tan x+\cot x)/(\tan x-\cot x)=((1)/(\sin x\cos x))/((\sin^2x-\cos^2x)/(\sin x\cos x))=(1)/(\sin x\cos x)\cdot(\sin x\cos x)/(\sin^2x-\cos^2x)\n\n=(1)/(\sin^2x-\cos^2x)=R_s\n\nL_s=R_s\Rightarrow The\ identity.$

There were 24 boys and 20 girls in a chess club last year. This year the number or boys increased by 25% but the number of girls decreased by 10%. Was there an increase or decrease in overall membership?

Answers

original=24+20=44
ok so find increase and decrease
25%=1/4
10%=1/10

24 TIMES 1/4=6
increase by 25%
24+6=30

girls decrease by 1/10
20 times 1/10=2
20-2=18

38+18=48
48>44
increase

There was an increase in the overall membership