Answer:
16/81
Step-by-step explanation:
Given the expression, 81y'' = -16y where y = coskt,
We want to know the value of k that satisfies the expression
y' = -ksinkt
y" = -k²coskt
Substitute y and y" into the expression given;
81y'' = -16y
81(-k²coskt) = -16(kcoskt)
-81k = -16
Divide both sides by -81
-81k/-81 = -16/-81
k = 16/81
Hence the value of k is 16/81
What is the standard form of y=2/5x-6
Answer: 5y=-2x-30
Move the x to the same side as y
2x+5y= -30
hello lol
HELP! ASAP!
Select all the expressions with a value of less than one.
Answer: all but the first one because anything to the power of 0 is one and -1 is lower than 1
Answer:
B, C, D, E
Step-by-step explanation:
A band expects to put 16 songs on their next CD. The band writes and records 62.5% more songs than they expect to put on the CD. During the editing process, 50% of the songs are removed. How many songs will there be on the final CD?
#3 An art-supply store sells a pad of watercolor paper after a 78% markup. If the store sells the paper for $46.99, what is the wholesale price? *
Answer:
$36.65
Step-by-step explanation:
You change 78% to .78 and multiply that by $46.99 and get 36.65.
RSTU is a parallelogram. Solve for x. Please help!
There is 1/3 of a pizza left to split between 3 of your friends. If you split the pizza equally what fraction of the pizza will each s get
Answer:
1/9
Step-by-step explanation:
The age of the older of two boys is twice that of the younger; 5 years ago it
was three times that of the younger. Find the age of each. pls include steps will mark brainiest
Answer: The older boy is now 20, the younger boy is now 10.
Step-by-step explanation: Explanation:
Let the age of the older boy now be y
let the age of the younger boy now be x
y = 2x
y-5 = 3(x-5)
simplifying
y = 3x - 10
substituting for y in equation 1
2x = 3x-10
simplifying
x = 10
substituting into 1
y = 20
They were 64 dogs and cats at the pet store. If 25% were cats, how many cats were at the pet store?
Answer:
16 are cats
Step-by-step explanation:
64 x 25%
64 x .25
16
Answer:
there are 16
Step-by-step explanation:
beacuse 25% of 64 is 16 like duh
A busload of campers stopped at a dairy stand for ice cream. They ordered 74 cones, some soft serve at 1.50 each and the rest hard pack at 1.25 each. If the total bill was 100, how many of each type of cone were ordered?
Answer:
40 of the hard pack, 33 of the soft serve
Step-by-step explanation:
x1.25+b1.50=100
100÷2=50
40×1.25=50
33×1.50=49.5
self check
50+49.5=100
(40) 1.25 + (33) 1.50 = 99.5, cant go any higher than that because the price was 100. 50 cents isnt going to buy the 1.25 hard pack or the 1.50 soft shell. so the answer would be 40 of the hard pack and 33 of the soft serve
write each as a fraction
Answer:
18) 7/10 20) 58/100 or 29/50 22) 2/3 24) 8/10 or 4/5 26) 3/10
Step-by-step explanation:
Answer:
18. 7/10 20. 29/50 24. 4/5 26. 3/10
Step-by-step explanation:
Umm im sorry i cant find number 22
Jacob made 12 out of 36 shots he attempted during a basketball game.
What percent of shots did he make?
Answer:
33.3333.....%
Step-by-step explanation:
A dinner party is being organized with the option of 7 dinner choices to serve at the venue. Since catering is expensive, the host asks everyone attending to rank each dish. The top ranked dish will be served at the venue. What is the probability that your favorite dish is the chosen dish served at the venue?
Answer: 1/7
Step-by-step explanation:
There are seven dishes in total. Only one dish will be served at the venue and you can only have one top-ranked dish. Thus, there is a one in seven probability of your favorite dish is the one chosen to be served.
Solve for n.
2-1/2n=3n+16
Answer:
N= -4
Step-by-step explanation:
The segments shown below could form a triangle.
O A. True
O B. False
#1) An airplane has 165 seats for passengers. Eleven-fifteenths of the seats
are full on a particular flight. How many passengers are on this flight?
Answer: 121 seats
Step-by-step explanation:
11/15 of the seat taken out of 165 so
11/15× 165= 120.9999≈121 seats
There are 10 balloons in an arrangement and 7 of them are red. What percentage of red balloons are in the arrangement?
Answer:
70% are red.
Step-by-step explanation:
Divide this: 7 divided by 10 equals 0.7
0.7 is 70% in percent
Please give me brainliest
Which step in the solution contains the first error?
9514 1404 393
Answer:
Step 4
Step-by-step explanation:
In Step 1, the first equation is correctly multiplied by 2.
In Step 2, the two equations from step 1 are correctly added.
In Step 3, the value of x is correctly determined by dividing by 11.
In Step 4, the value of x is incorrectly substituted for y in the original first equation.
The first error is in Step 4.
if you drink two 12 ounces soda a day, how much soda do you drink per week?
Answer:
168
Step-by-step explanation
12+12=24 so 24x7=168
Determine the value of the expression below.
60 - (9÷3)² + 15
Answer:
60-3^2+15
60-9+15
the answer is 66
Helpp with this math.
Answer:
it's c lol
Step-by-step explanation:
Answer: I think it D
Step-by-step explanation:
Because you have to -1.3 +5x(2 2/3-1/4)
I think 0.25=1/4
3,145 divided by 5 equal
Answer:
629
Step-by-step explanation:
bruh
Help please xxxxxx please
Answer: x = 84°.
Step-by-step explanation: The sum of interior angles of a quadrilateral is equal to 360°. We are given three of the interior angles and asked to find the remaining angle. To do this, we can add the three given angles and subtract the sum from 360°. 53° + 125° + 98° = 276°. 360° - 276° = 84°. Thus, x = 84°.
Sue is upholstering a rectangular ottoman that measures 21 centimeters by 18 centimeters by 15 centimeters. What will be the total square centimeters of fabric that Sue must use to cover all faces of the ottoman?
Answer:
1926cm²
Step-by-step explanation:
Given
Dimension = 21cm by 18cn by 15cm
The illustration in this question is to determine the surface area of the fabric and this is calculated using the surface area of a cuboid as follows:
[tex]Surface\ Area =2(LB + LH + BH)[/tex]
Where L, B and H are the dimensions.
So,
[tex]Surface\ Area = 2(21 * 18 + 21 * 15 + 18 * 15)[/tex]
[tex]Surface\ Area = 2(378 + 315 + 270)[/tex]
[tex]Surface\ Area = 2(963)[/tex]
[tex]Surface\ Area = 2 * 963[/tex]
[tex]Surface\ Area = 1926cm\²[/tex]
Hence, 1926 cm² of fabrics are needed to cover all surfaces.
To make 1 batch of sky blue paint, Clare mixes 2 cups of blue paint with 1 gallon of white paint.
a. Explain how Clare can make 2 batches of sky blue paint.
Claire can mix
[ Select ]
cups of blue paint with
[ Select ]
gallons of white paint.
b. Explain how to make a mixture that is a darker shade of blue than the sky blue.
You could mix
[ Select ]
2 cups of blue paint with 1 gallon of white paint or use less
[ Select ]
paint with Clare's recipe.
c. Explain how to make a mixture that is a lighter shade of blue than the sky blue.
You could mix
[ Select ]
2 cups of blue paint with 1 gallon of white paint or use more
[ Select ]
paint with Clare's recipe.
parallelogram pqrs is shown. find the m
Anita opens a savings account by making a deposit of $272.95. Every week, she deposits another $45.25 in the account. How much will be in the account after 6 weeks?
$318.20
$453.95
$499.20
$544.45
Answer:
D. $544.45
Step-by-step explanation:
step 1:
6 x 45.25 = 271.5.
step 2:
271.5 + 272.95 = 544.45
A photograph of a strand of human hair shows the hair magnified by factor of 200. If the photo shows the hair as 2cm wide, what is the actual width of the hair
Answer:
i need points and i dont know this answer to the guestion
Step-by-step explanation:
Find the solution set for 8x^-9x=-1
Answer:
[tex]\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}[/tex]
[tex]x=\frac{1}{8},\:x=1[/tex]
Step-by-step explanation:
Given the equation
[tex]8x^2-9x=-1\:\:[/tex]
Add 1 to both sides
[tex]8x^2-9x+1=-1+1[/tex]
[tex]8x^2-9x+1=0[/tex]
as
[tex]\left(8x-1\right)\left(x-1\right)=8x^2-9x+1[/tex]
so the equation becomes
[tex]\left(8x-1\right)\left(x-1\right)=0[/tex]
Using the zero factor principle:
[tex]\:If}\:ab=0\:\mathrm{then}\:a=0\:\mathrm{or}\:b=0\:\left(\mathrm{or\:both}\:a=0\:\mathrm{and}\:b=0\right)[/tex]
so
[tex]8x-1=0\quad \mathrm{or}\quad \:x-1=0[/tex]
solving
[tex]8x-1=0[/tex]
[tex]8x=1[/tex]
[tex]\frac{8x}{8}=\frac{1}{8}[/tex]
[tex]x=\frac{1}{8}[/tex]
also solving
[tex]x-1=0[/tex]
[tex]x=1[/tex]
[tex]\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}[/tex]
[tex]x=\frac{1}{8},\:x=1[/tex]
Each side of a square is increasing at a rate of 6 cmys. At what rate is the area of the square increasing when the area of the square is 16 cm2?
Answer:
k I think it is 16v cm 4
Step-by-step explanation:
A train travels 25 miles in 20 minutes. What is the train’s speed in miles perhour?
Answer:
So,
The rate of the train is 25mi/20mins. We need (x)mi/hr. We can do that by multiplying by 3.
25(3) = 75
The train's speed in mph is 75 mph.
Step-by-step explanation: