• ### How to get from (1 - 0.2^n)/0.8 to 1.25(1 - 0.2^n) ?

Best answer: (1/0•8) (1 - 0•2^n) 1•25 ( 1 - 0•2^n )
Best answer: (1/0•8) (1 - 0•2^n) 1•25 ( 1 - 0•2^n )
2 answers · Mathematics · 1 week ago
• ### Traveling at 65 miles an hour, how many feet can you travel in 22 minutes?

Best answer: 60 mins _______65 x 5280 ft 22 min______22/60 x 65 x 5280 ft = 125,840 ft
Best answer: 60 mins _______65 x 5280 ft 22 min______22/60 x 65 x 5280 ft = 125,840 ft
7 answers · Mathematics · 2 weeks ago
• ### Find the eqn of normal to the curve y=(2x-3)² at the point x=-2.?

Best answer: y = f (x) = 4x² - 12 x + 9 f ' (x) = 8x - 12 f ' (2) = 4 = m1 m2 = (-1/4) is gradient of normal f (-2) = 49 Point (- 2 , 49) y - 49 = (-1/4) ( x + 2 ) y = (-1/4) x + 97/2________equation of normal
Best answer: y = f (x) = 4x² - 12 x + 9 f ' (x) = 8x - 12 f ' (2) = 4 = m1 m2 = (-1/4) is gradient of normal f (-2) = 49 Point (- 2 , 49) y - 49 = (-1/4) ( x + 2 ) y = (-1/4) x + 97/2________equation of normal
2 answers · Mathematics · 1 week ago
• ### Find the acute abgle between lines 2x-4y+5=0 and x+4y=0?

Best answer: Line 1 4y = 2x - 5 y = (1/2) x - 5/4 m1 = tan ∅1 = 1/2 ∅1 = 26 • 6 ° Line 2 4y = - x y = (-1/4) x m2 = tan ∅2 = - 1/4 ∅2 = 166 ° Angle between = 139 • 4 ° Acute angle = 40 • 6 °
Best answer: Line 1 4y = 2x - 5 y = (1/2) x - 5/4 m1 = tan ∅1 = 1/2 ∅1 = 26 • 6 ° Line 2 4y = - x y = (-1/4) x m2 = tan ∅2 = - 1/4 ∅2 = 166 ° Angle between = 139 • 4 ° Acute angle = 40 • 6 °
5 answers · Mathematics · 1 week ago
• ### Simplify cos^2 x/cos (2x)+sin^2 x?

Best answer: Taking a guess that you may mean :- cos²x / [ cos 2x + sin²x ] cos²x / [ 2 cos²x - 1 + 1 - cos²x ] cos²x / cos²x = 1
Best answer: Taking a guess that you may mean :- cos²x / [ cos 2x + sin²x ] cos²x / [ 2 cos²x - 1 + 1 - cos²x ] cos²x / cos²x = 1
3 answers · Mathematics · 1 month ago
• ### Trig help?

Best answer: 2/5 1320/b b = 660 x 5 b = 3300 ft c² = 3300² + 1320² c² = 12632400 c = 3554 • 2 ft tan ∅ = 1320 / 3300 ∅ = 22 °
Best answer: 2/5 1320/b b = 660 x 5 b = 3300 ft c² = 3300² + 1320² c² = 12632400 c = 3554 • 2 ft tan ∅ = 1320 / 3300 ∅ = 22 °
4 answers · Mathematics · 3 weeks ago
• ### If cosB=(-2/3) and π<B<3π/2, find sin2B?

Best answer: y² = 9 - 4 = 5 y = - √5________3rd quadrant sin 2B = 2 sin B cos B sin 2B = 2 (- √5/3) ( - 2/3) = 4 √5 / 9
Best answer: y² = 9 - 4 = 5 y = - √5________3rd quadrant sin 2B = 2 sin B cos B sin 2B = 2 (- √5/3) ( - 2/3) = 4 √5 / 9
5 answers · Mathematics · 3 weeks ago
• ### Using an identity show that sec(π/2- θ) = cscθ.?

Best answer: sec ( π/2 - ∅ ) = 1 / cos (π/2 - ∅) = 1 / sin ∅ 1 / sin ∅ = csc ∅
Best answer: sec ( π/2 - ∅ ) = 1 / cos (π/2 - ∅) = 1 / sin ∅ 1 / sin ∅ = csc ∅
1 answer · Mathematics · 3 weeks ago
• ### Write as an equation. 60 is 2 more than the product of 5 and N. 60 = 2 + 5/N 60 = 2N + 5 60 = 2 + 5 + N 60 = 2 + 5N?

Best answer: 60 = 5N + 2
Best answer: 60 = 5N + 2
8 answers · Mathematics · 3 weeks ago
• ### Why is it that when I enter -4^4 on my TI-84 Plus calculator I get -256 when it should be 256?

Best answer: Use brackets (-4)⁴ = 256
Best answer: Use brackets (-4)⁴ = 256
10 answers · Mathematics · 3 weeks ago
• ### Why is x*2 + x*2 = 2x*2 instead of x*4?

Best answer: 1 x² + 1 x² = 2 x²
Best answer: 1 x² + 1 x² = 2 x²
10 answers · Mathematics · 1 month ago
• ### T + 9 = 3 − R make R the subject of the formula?

Best answer: R = 3 - 9 - T R = - 6 - T
Best answer: R = 3 - 9 - T R = - 6 - T
3 answers · Mathematics · 1 month ago
• ### Express 2sin^2𝜃+3cos𝜃 in terms of cos𝜃?

Best answer: 2 sin²∅ + 3 cos ∅ 2 ( 1 - cos²∅ ) + 3 cos ∅ 2 + 3 cos ∅ - 2 cos²∅
Best answer: 2 sin²∅ + 3 cos ∅ 2 ( 1 - cos²∅ ) + 3 cos ∅ 2 + 3 cos ∅ - 2 cos²∅
2 answers · Mathematics · 2 months ago
• ### Maximum value of sin¢+cos¢?

Best answer: Let cos x + sin x = k cos ( x - a ) cos x + sin x = k cos a ( cos x ) + k sin a ( sin x ) 1 = k cos a 1 = k sin a 1² + 1² = k² k = √2 tan a = 1____________a lies in first quadrant a = π/4 cos x + sin x = √2 cos ( x - π/4 ) Max value is √2
Best answer: Let cos x + sin x = k cos ( x - a ) cos x + sin x = k cos a ( cos x ) + k sin a ( sin x ) 1 = k cos a 1 = k sin a 1² + 1² = k² k = √2 tan a = 1____________a lies in first quadrant a = π/4 cos x + sin x = √2 cos ( x - π/4 ) Max value is √2
7 answers · Mathematics · 2 months ago
• ### HELP ME! SIMPLIFYING POLYNOMIAL EXPRESSIONS!!!?

Best answer: 49 x² + 28x + 4 - [5x] [ - 3x - 9 ] 49 x² + 28x + 4 + 15x² + 45x 64 x² + 73 x + 4
Best answer: 49 x² + 28x + 4 - [5x] [ - 3x - 9 ] 49 x² + 28x + 4 + 15x² + 45x 64 x² + 73 x + 4
4 answers · Mathematics · 2 years ago
• ### Precalculas 11 finding the sum in an arithmetic series?

Best answer: . Sn = (n/2) [ 2a + (n - 1) d] 186 = 6 [ 2a + 11 d ] 2a + 11 d = 31 a + 19 d = 83 2a + 11 d = 31 2a + 38 d = 166 27 d = 135 d = 5 a + 95 = 83 a = - 12 S40 = (40/2) [ - 24 + 39 x 5 ] S40 = 20 [ 171 ] S40 = 3420
Best answer: . Sn = (n/2) [ 2a + (n - 1) d] 186 = 6 [ 2a + 11 d ] 2a + 11 d = 31 a + 19 d = 83 2a + 11 d = 31 2a + 38 d = 166 27 d = 135 d = 5 a + 95 = 83 a = - 12 S40 = (40/2) [ - 24 + 39 x 5 ] S40 = 20 [ 171 ] S40 = 3420
3 answers · Mathematics · 1 month ago
• ### 4 (p-2q) = 3p + 2 So I expanded the brackets first to get: 4p - 8q = 3p + 2 added the 8q to the left to cancel out. subtracted the 3p on?

Best answer: . 4p - 8q = 3p + 2 p = 2 + 8q
Best answer: . 4p - 8q = 3p + 2 p = 2 + 8q
4 answers · Mathematics · 1 month ago
• ### 9 subjects in one semester.Can you do it?I struggle and I cant function and I m very smart.?

Best answer: You have to spread your time such that all subjects are covered. Some subjects may require more time than others.
Best answer: You have to spread your time such that all subjects are covered. Some subjects may require more time than others.
1 answer · Primary & Secondary Education · 1 month ago
• ### I struggle in engineering school.How to study more effectively?I have past papers and books.?

Best answer: A tried and tested way is to read the notes , look at the worked examples then do the exercises. It may be that text books can help as a back up to your notes.
Best answer: A tried and tested way is to read the notes , look at the worked examples then do the exercises. It may be that text books can help as a back up to your notes.
1 answer · Mathematics · 1 month ago