Answers
Related Questions
Use the product-to-sum identities to rewrite the following expression as a sum or difference.
2cos(2x)cos(2x)
Answers
= cos4x
Explanation:
cosAcosB = [cos(A-B)+cos(A+B)]
Given: 2cos(2x)cos(2x)
= 2[cos(2x-2x)+cos(2x+2x)]
= 2cos4x^2
What is the equation of a hyperbola with a = 5 and c = 15? Assume that the transverse axis is horizontal.
Answers
Answer:
[tex]\frac{x^2}{25} -\frac{y^2}{200} =1[/tex]
Step-by-step explanation:
Recall that the equation of hyperbola centered at the origin with transverse horizontal axis has the general form:
[tex]\frac{x^2}{a^2} -\frac{y^2}{b^2} =1\\and\,\,\,\, with\\c=\sqrt{a^2+b^2}[/tex]
since we know that a = 5 ,and c = 15,we can solve for b:
[tex]15=\sqrt{5^2+b^2} \\15^2=25+b^2\\b^2=200\\[/tex]
then the equation of the hyperbola becomes:
[tex]\frac{x^2}{5^2} -\frac{y^2}{200} =1\\\frac{x^2}{25} -\frac{y^2}{200} =1[/tex]
If a carton of a dozen eggs cost $3.99 how much would 3 eggs be?
Answers
If a carton of a dozen eggs cost $3.99 how much would 3 eggs be?
Answer:
2. Mr. Cautious has $10 in his wallet and decides to walk dogs for his neighbors to earn more money. He
charges $4 to walk each dog around the block. How many dogs will Mr. Cautious need to walk to have 130$ in his wallet?
Answers
Answer:
34
Step-by-step explanation:
What's 1+1? PLZ answer.
Answers
Answer:
1 + 1 = 2
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
1+1 =2
Y is directly proportional to x when x=540 y=10 calculate the value of y when x=540.
Answers
Answer:
Step-by-step explanation:
Y should still be 10 since x is 540
Which of the following represent functions that have the same rate of change?
Answers
The answers are A and C.
What is the solution for 2X- 5=7
Answers
Answer:x = 6
Step-by-step explanation:
Answer:
x=6
Step-by-step explanation:
Add 5 to both sides of the equation:
2x -5 = 7
2x -5 +5 =7 +5
Simplify:
2x=12
Divide both sides of the equation by the same term:
2x = 12
2x/2 = 12/2
Simplify again:
x=6
Answer:
x = 6
The equation of a line is y = 2/3x + 5. What is an equation of the line that is perpendicular to the given line and that passes through the point (4, 2)?
Answers
Step-by-step explanation:
line that is perpendicular to the given line :
y = 2/3x + 5
m1 × m2 = -1
m1 = the coefficient of x
m1 = 2/3
remember : m1 × m2 = -1
2/3 x m2 = -1
2m2 ÷ 3 = -1
(let m2 = x)
2x ÷ 3 = -1
(cross multiply)
2x = 3 × -1
2x = -3
(divide both sides by the coefficient of x)
x = -3/2
Remember : m2 =x
m2 = -3/2
The line that passes through the point (4,2) ;
( note : x¹ = 4 , y¹ = 2)
m = (y - y1) ÷ (x - x1 )
-3/2 = (y - 2) ÷ (x - 4)
(cross multiply)
-3(x - 4) = 2 (y - 2)
-3x +12 = 2y - 4
(make y the subject of formula )
-3x + 12+ 4 = 2y
-3x + 16 = 2y
(
(divide through by the coefficient of y)
-3x/ 2 + 16/2 = y
-3/2x + 8 = y
HOPE IT WAS HELPFUL
Rewrite 1/4 / 1/3 as a unit rate
Answers
Answer:
0.25 and 0.33?
Step-by-step explanation:
The distance between (2, 3) and (6, -2) is
Answers
Answer:
(4, -5) should be the correct answer
Step-by-step explanation:
I hope this helps, please mark brainliest if correct!
What is 12% of 1350?
Answers
Answer:
162
Step-by-step explanation:
If the Semi Monthly is $4,000
A) How much is the Annual?
B) How much is the Bi Weekly?
C) How much is the Monthly Pay?
D) How much is the Weekly Pay?
E) How much is the Hourly Pay?
Im at a loss on how to answer this I reallyy need help
Answers
A- if semi monthly is half a month, then 4 times 2 is 8, and 8 times 12 is 96,000.
B- If there are 4 weeks in a month and 4000$ accounts for half of that pay, then the weekly pay is 2000, making the bi-weekly pay 1000.
C- The monthly pay is 8,000$ because 4,000 x 2 is 8,000
D- The weekly pay is 2,000$ because the monthly pay is 8,000$ and there are 4 weeks in a month
E- I do not know the hours at this job and therefore cannot answer this
Which is a correct frost step for solving this equation
Answers
Answer:
you have to post the equation
Step-by-step explanation:
Find the volume of figure B. Round your answer to two decimal places.
Answers
Answer:
I wanna say 60, I just doubled 30
30 x 2 = 60m. Could be wrong.
please answer see the image below
Answers
Answer:
64.8Step-by-step explanation:
total area = rectangle + semi circle
= (11 x 5) + (1/2 * π * 2.5²)
= 55 + 9.8
= 64.8 sq. units
The exchange rate for 1 dollar is 1.3021 euros
Answers
Answer:
889.021796 (or simplifyed, 889.02)
Step-by-step explanation:
1 USD = 1.3021 EU
so what we do here is multiply 1.3021 and 682.76
1.3021 x 682.76 = 889.021796
For a party, you buy 4 3/8 lbs of salt water taffy. If 150 people are attending, how much salt water taffy does each person get?
Answers
Answer:
..
Step-by-step explanation:
determine the slopes below.
Answers
What is the equation for (-3,-14) and (0,-9)
Answers
f(x)=−10x2−x and g(x)=−2x2−x, find (f−g)(x) and (f−g)(−2)
Answers
Answer:
(f - g)(x) = -8x²
(f - g)(2) = -32
General Formulas and Concepts:
Algebra I
Combining like termsStep-by-step explanation:
Step 1: Define
f(x) = -10x² - x
g(x0 = -2x² - x
(f - g)(x) is f(x) - g(x)
(f - g)(2) is f(2) - g(2)
Step 2: Find (f - g)(x)
Substitute: (f - g)(x) = -10x² - x - (-2x² - x)Distribute -1: (f - g)(x) = -10x² - x + 2x² + xCombine like terms: (f - g)(x) = -8x²Step 3: Evaluate
Substitute: (f - g)(2) = -8(-2)²Evaluate: (f - g)(2) = -8(4)Multiply: (f - g)(2) = -32And we have our answers!
anybody know the answer?
ive been stuck on this math question foreverrrrrr theres no context they just want a explanation of the answer
Answers
Answer:
count the colors
Step-by-step explanation:
count the green, then the red, then the blue
2h + (6 + h) + 6 ∙ 2
Answers
Answer: 3h+18
Step-by-step explanation:
2h+6+h+12
add like terms (add all the the h’s) which equals 3h and add 6+12 which equals 18 so your answer is 3h+18
IF UR GOOD IN GEOMETRY THIS QUESTION IS FOR YOU !! PLEASE HELP I SUCK AT MATH !
Answers
Answer:
(2,3 is dilated to 8,12 by a scale factor of 4)
Step-by-step explanation:
multiply 2,3 by numbers until it gets to 8,12, once you multiply by 4 you get 8,12 which means the answer is a scale factor of 4
Find the small positive integer solution that solves the equation. if there is no solution, type NONE.
(8x)(mod 13)≡4
x=?
Answers
9514 1404 393
Answer:
x = 7
Step-by-step explanation:
The equation can be rewritten to ...
8x = 13n +4 . . . . for some integers x and n
x = (13n +4)/8
For x to be an integer, 13n must be an odd multiple of 4. Since 13 is an odd number, n=4 will do.
x = (13·4 +4)/8 = 56/8
x = 7
__
The graph shows a "trial and error" method of solution. Only values of x less than 13 need to be examined.
Given △XPS≅△DNF, find the values of x and y.
Answers
Answer:
x = 3
y = 15
Step-by-step explanation:
If △XPS ≅△DNF, their corresponding sides would be congruent. This implies that:
XP ≅ DN
PS ≅ NF
XS ≅ DF
Given that:
XP = 4y - 3
DN = 57
NF = 51
XS = 17x + 3
DF = 54
Therefore:
XP = DN
4y - 3 = 57 (Substitution)
Add 3 to both sides
4y = 57 + 3
4y = 60
Divide both sides by 4
y = 60/4
y = 15
Also,
XS = DF
17x + 3 = 54 (substitution)
Subtract 3 from each side
17x = 54 - 3
17x = 51
Divide both sides by 17
x = 51/17
x = 3
Find the coordinates of point P that lies along the directed line segment AB in a 2:3 ratio given A (-2, 1), B (3, 4).
Answers
Answer:
[tex]P(x,y) = (0,\frac{11}{5})[/tex]
Step-by-step explanation:
Given
[tex]A = (-2,1)[/tex]
[tex]B = (3,4)[/tex]
[tex]m:n = 2:3[/tex]
Required
Determine the coordinates of P
The coordinate of a point when divided into ratio is:
[tex]P(x,y) = (\frac{mx_2 + nx_1}{m + n},\frac{my_2 + ny_1}{m + n})[/tex]
Where
[tex](x_1,y_1) = (-2,1)[/tex]
[tex](x_2,y_2) = (3,4)[/tex]
[tex]m:n = 2:3[/tex]
This gives:
[tex]P(x,y) = (\frac{2 * 3 + 3 * -2}{2 + 3},\frac{2 * 4 + 3 * 1}{2 + 3})[/tex]
[tex]P(x,y) = (\frac{6 - 6}{5},\frac{8 + 3}{5})[/tex]
[tex]P(x,y) = (\frac{0}{5},\frac{11}{5})[/tex]
[tex]P(x,y) = (0,\frac{11}{5})[/tex]
what is the decibel level of the noise from a fire alarm with intensity 10^-1 watts per square inch
Answers
Answer:
110 db
Step-by-step explanation:
Serious explination on this one with the answer guys? First to answer gets brainliest!
Answers
Answer:
the answer is -5x + -8x-5/2x^2-3
Step-by-step explanation:
:)
emilio is tiling a countertop with square tiles. Each tile covers 64 square inches. THe total area of the countertop is 5,184 square inches. What is the minimum number of tiles Emilio will need to tile the entire countertop. Use explanation or reported